Podcaster: Dr Jacinta Delhaize and Dr Daniel Cunnama ; Guest: Prof. Phil Diamond

Title: Cosmic Savannah – Ep. 037: Square Kilometre Array telescope is go for construction!

Link :

@cosmicsavannah (twitter, facebook & instagram)


Welcome to Season Four! We start with a bang and speak with the Director General of the Square Kilometer Array Telescope, Prof. Phil Diamond! Phil tells us how it feels to finally have the green light for construction of this giant telescope, after nearly 30 years of preparation.

Phil shares what it’s like to lead such an enormous international endeavor. We also discuss the challenges involved in building the SKA, the formation of the Square Kilometer Array Observatory (SKAO) and what will happen next.

We hear about plans to ensure the environmental sustainability of the SKAO and how it can be a tool for international cooperation and diplomacy.

Bio: Dr Jacinta Delhaize and Dr Daniel Cunnama are astronomers based in Cape Town, South Africa. Jacinta is a Research Fellow at the University of Cape Town. She spends her time using huge radio telescopes to study gas and black holes in distant galaxies. Daniel is the Science Engagement Astronomer at the South African Astronomical Observatory. He likes to use large supercomputers to create simulations of galaxies. Both Jacinta and Daniel love to promote the incredible astronomy happening across the African continent.

Prof Phil Diamond – Director General of the SKA

Today’s sponsor:  Big thanks to our Patreon supporters this month: Rob Leeson, David Bowes, Brett Duane, Benett Bolek, Mary Ann, Frank Frankovic, Michael Freedman, Kim Hay, Steven Emert, Frank Tippin, Rani Bush, Jako Danar, Joseph J. Biernat, Nik Whitehead, Michael W, Cherry Wood, Steve Nerlich, Steven Kluth, James K Wood, Katrina Ince, Phyllis Foster, Don Swartwout, Barbara Geier, Steven Jansen, Donald Immerwahr

Please consider sponsoring a day or two. Just click on the “Donate” button on the lower left side of this webpage, or contact us at

Please visit our Patreon page:

or you can consider to sponsor a day of our podcast :


Jacinta: [00:00:00] Welcome to The Cosmic Savannah with Dr Jacinta Delhaize

Dan: [00:00:05] and Dr Daniel Cunnama. Each episode, we will be giving you a behind the scenes look at world-class astronomy and astrophysics happening under African skies.

Jacinta: [00:00:14] Let us introduce you to the people involved, the technology we use, the exciting work we do, and the fascinating discoveries we make.

Dan: [00:00:22] Sit back and relax as we take you on a safari through the skies.

Jacinta: [00:00:30] Hi, everyone. Welcome to season four.

Dan: [00:00:33] Welcome to season four of The Cosmic Savannah!

Jacinta: [00:00:35] How exciting that we made it here, Dan!

Dan: [00:00:38] Yeah, who would have thought? 36 episodes. So far?

Jacinta: [00:00:41] 37. Episode 37.

Dan: [00:00:43] Number 37. Yeah, phew! It’s gone by in a flash.

Jacinta: [00:00:49] Kind of. Yeah, it has. I can’t believe that we’ve made it this far. It’s so exciting.

Thank you for all of our returning listeners. Welcome back. And for our new listeners, a big warm welcome.

Dan: [00:00:59] Yeah. And maybe we should just give a sort of brief recap of who we are and what we do. And why we talk.

Jacinta: [00:01:07] Yeah, sure! Yes

Dan: [00:01:09] Jacinta!?

Jacinta: [00:01:09] Yes, well I am Jacinta and I am a research fellow at the University of Cape Town. And I am, as you can hear from my accent, I’m from Australia originally. And I moved to Cape Town in 2018, just in time for the launch of,  just after the launch of a brand new radio telescope in South Africa called MeerKAT, which is in the Karoo region, producing so much amazing science.

And I’m very privileged to be able to use the data from that for my work. And this is all in the lead up for a telescope called the SKA, the Square Kilometer Array, which we’ll be talking a lot about today. And I’m one of the co-hosts of The Cosmic Savannah podcast, which is just talking about amazing astronomy coming out of the African continent, which we don’t often hear about, but there really is some amazing stuff happening.

And so we wanted to share that with everyone around the world.

Dan: [00:02:02] Yeah, we’re pretty psyched about astronomy coming out of Africa and you’ll, if you keep listening, you’ll hear that over and over.

Jacinta: [00:02:09] Dan, tell us about yourself.

Dan: [00:02:11] Why thank you.

My name is Daniel. You can call me Dan and I’m the science engagement astronomer at the South African Astronomical Observatory.

So the South African Astronomical Observatory is responsible for all of the optical and infrared astronomy that happens in South Africa. And we have our head office in Cape Town South Africa. And we have our optical and infrared telescopes, about four hours north in a town called Sutherland. My role at the observatory is to promote the research we do and the science we do as well as astronomy in general.

And I do that in various ways, the obvious ways and sort of press releases, TV, radio, podcasts. And then also in some kind of new and exciting ways, I’m responsible for the construction of a new visitor center. And I’ve made two planetarium films now.

Jacinta: [00:03:08] Two??

Dan: [00:03:09] Yeah, there’s a new one.

Jacinta: [00:03:11] Yeah. We talked all about your previous one Rising Star in our last season.

So what what’s going on with the new one? What have you been up to?

Dan: [00:03:18] Yeah. So in our break season break, I’ve been a busy bee and we have created our second planetarium film now. This one focusing on San star law. So the Xhomani San people from the Kalahari desert in the Northern part of South Africa. And we went there, we worked with the community there in collecting some of their stories about the sky.

And then we’ve incorporated that into a film which involves a lot of the sort of general feel of the area, but then also some animation we’ve animated the story sort of just to try and get it across because it’s a little bit fantastical. Is fantastical a word?

Jacinta: [00:04:01] It is now. And you told me some pretty cool stories of your time up there in the Karoo filming this.

And it’s got to do with our new podcast art.

Dan: [00:04:12] How did we get that far without saying we got a new, new art?

Jacinta: [00:04:15] Yeah!

Dan: [00:04:16] You may have noticed, or if you’re a new listener, you may not have noticed, that we have a new logo. New podcast art or a slight facelift and yeah, on my trip to the Kalahari, I had a mission to film a planetarium show. But then I was also sent on another mission by a certain Dr Jacinta Delhaize to, to get us a nice picture of the Milky Way , with an Acacia tree in the foreground. So one of the nights when we had been we’d finally wrapped our shooting at 10:00 PM or something, we bundled up into the car and drove off to try and find a tree, which was great fun.

We spent a few hours there and manage it to get a couple of great shots and one of them, which we have now incorporated into us into our logo. I hope you like it, Jacinta?

Jacinta: [00:05:03] Yeah. Well, I love it. I really love it. I hope our listeners like it. I mean, I loved our previous one as well. It was a picture of a comet over table mountain and it was beautiful, but it wasn’t a savannah.

And  the name of our podcast is The Cosmic Savannah. So I really wanted an Acacia tree because when I think of the savannah, that’s what I think of. And I wanted elephants too, but Dan said, no.

Dan: [00:05:25] Well, there’s no elephants in the Kalahari, well not in that part of the Kalahari.

Jacinta: [00:05:29] Oh, well that makes sense that we have to be authentic.

Dan: [00:05:32] So I should give a shout out to the film crew who helped take this photo Carl Jones, Jared Keiser, Telmo Dos Reis, who we all bundled into the car and went to take these photos. It was super funny evening and we got some great shots. We also saw some cooler. No elephants,

Jacinta: [00:05:49] What did you see?

Dan: [00:05:50] Yeah, well, it was amazing.

Cause we were out there and just worrying about the stars, which were incredible and trying to take photos of them and painting trees with light and all sorts of cool stuff. And then we climbed in the car. We were like, well, we better get back now it’s getting late. And climbed in the car. And we just started seeing these eyes on the road and we saw a little bat-eared fox.

We saw spring hares, which are like these amazing things as in Australia, and they look like kangaroos, but they’re like half a kangaroo, half a rabbit. So like they’re way cuter than kangaroos naturally. Yeah. Talking about animals, but yeah, super fun evening and thanks to, to Carl , Jared and Telmo for that super experience, and the great photo we got out of it.

Jacinta: [00:06:33] Yeah. And you had an awesome graphic designer as well, who helped put together.

Dan: [00:06:37] So then we handed it over to Susie Caras, who’s a graphic designer and she’s worked her magic and made it look absolutely stunning.

Jacinta: [00:06:46] All right. That’s enough about art. So our listeners can see that when they click subscribe, hopefully to our podcast.

Okay. So we’ve gotten this. We still haven’t introduced what our topic is for this episode or our guest. So let’s do that now. Who do we have on the podcast today?

So today we are joined by the illustrious Professor Phil Diamond who is the SKA Director.

He is the Director General. So the big, big, big boss of the entire SKA.

Dan: [00:07:15] The SKA organization as it is now.

So the SKA is the Square Kilometer Array, which is the telescope and the SKA organization has now formed formally all the countries, all the partner countries have signed. And very recently the SKA was given the green light for construction.

Jacinta: [00:07:34] Yes, that was very exciting. But before we get into that, and Phil’s going to tell us all about that.

Dan, do you just want to run us through quickly for listeners who they’re joining us for the first time? What is the SKA and why is it such a big deal?

Dan: [00:07:46] Sure.

So the SKA is a radio telescope and  MeerKAT is a radio telescope to slightly smaller one, which Jacinta mentioned earlier. And radio telescope is something which looks at radio light.

So radio waves, which are coming from space and we collect them, we combine them and we try and make images of distant galaxies and gas and various objects out in space, which we can map with a radio telescope. A radio telescope looks quite different to a regular telescope. It’s a dish in South Africa.

We have these things called satellite dishes. I’m not sure if they’re the same around the world to get TV, but they there’s a small sort of dish that sits on your roof and MeerKAT and SKA have very large ones, 15 meters across and a whole array of them. So MeerKAT has an array of 64 dishes, each 13 meters across, and the SKA will have about 200 of those, or at least in the first phase.

And those will be about 15 meters across. So we’re looking at,  a huge array of these satellite dishes sitting out in a desert somewhere and trying to collect very, very faint radio waves from across the universe.

Jacinta: [00:09:00] Yes, exactly.

Dan: [00:09:02] Well I hope exactly.

Jacinta: [00:09:03] Well, this telescope is going to be the biggest one that has ever been built. In the history of,  the earth. And it’s really special because it’s going to be built across two continents. Right? So part of it will be built in Southern Africa. And the other part will be built in Western Australia, where I come from. So essentially it’s going to be two telescopes, one observatory, and the headquarters are in Manchester, in the UK.

And Phil’s going to tell us all about that in a moment.

Dan: [00:09:29] As you mentioned the Australian,  portion of the SKA it has a slightly different look, actually. So it’s still an array of radio telescopes, but these are sort of wire Christmas tree things. All right. So we’re going to be hearing from Professor Phil Diamond.

who is the SKA Director General. And he’s going to be telling us about this and more, and just a note for football fans, that this was recorded a couple of days before the Euro 2020 final.

Jacinta: [00:09:54] You’ll hear why that’s relevant. All right. Let’s hear from Phil.

Dan: [00:10:03] So joining us today is the square kilometer array observatory director general Professor Phil Diamond.

Jacinta: [00:10:10] Welcome to The Cosmic Savannah, Phil.

Phil: [00:10:13] Hi guys. Good to meet you.

Jacinta: [00:10:14] Great to have you here.

Dan: [00:10:15] Thanks for joining us. First question I wanted to get straight into if Italy wins on Sunday. Are they kicked out of the SKA?

Phil: [00:10:24] I cannot answer that question. In my heart, I know what I would do, but

look, it’s 55 years mate, 55 years and the 1966 world cup final is the first football game I ever remember.  Because we had to go and watch it at my neighbors because my parents didn’t own a TV. So it was a, it was an event for me. And that was the last time we won anything.

Dan: [00:10:59] Sure.

Jacinta: [00:11:00] I assume we’re talking, are we talking about some sort of football tournament?

Phil’s shaking his head and he’s speechless.

Phil: [00:11:12] Yes,

Dan: [00:11:14] Please excuse my co-host.

Jacinta: [00:11:19] All right. Okay. Phil, could you just start by telling us in your own words, what is the SKA and what it means to be  director general?

Phil: [00:11:27] So the SKA stands for square kilometer array, which is somewhat of a misnomer because the square kilometer is still our aspiration for the long-term goal, for the amount of collecting area that we hope to build in the next generation.

 Radio telescope or radio telescopes, plural. But  the name is, has been around now for nearly 30 years and it is stuck with us, but really what the  SKA is, what the SKA observatory is. Is an organization that’s been put together a global organization to design and build and ultimately operate two next generation radio telescopes, each of which in the frequency range in which they  operate  will be the largest radio telescope, indeed the largest telescope on or off the earth. So a very complex program that we’re engaged in very complex international relationships that we have to deal with. But the ultimate goal is to build two telescopes that will observe the universe and each will have an enormous.

Range of science that they will address. I hope that captures it in a few


Dan: [00:12:46] Radio telescopes, I mean was 30 years ago. Was this the goal? Why not  another science experiment? Why did this one get so big?

Phil: [00:12:57] It was the late 1980s, early 1990s, that that scientists from around the world were thinking about the next big scientific challenges.

 One of those core challenges,  one of those that emerged was being able to look back. Pretty much to the Dawn of the universe using hydrogen, the most common element in the universe. By looking back through time to that dawn, to see the first stars, the first galaxies that were formed out of those stars, first black holes, and then to watch the universe

evolve and develop to what it is now. One of the ways, in fact, the, the only way that you can follow that full evolution is through the study of hydrogen. And hydrogen has a specific emission line, which in the rest brain that is local to our own galaxy, emits it’s a wave length of 21 centimeters. If you look back in time because the Universe

is expanding that 21 centimeters grows the further back we look, but all of that sits within what we call the radio spectrum, the radio parts of the electromagnetic spectrum. What we see with our eyes is a particular part of that spectrum with very tiny wavelength radio is on a much longer wavelength.

And so in order to detect these radio signals, one need, large steel structures, such as radio telescopes, which are the radio equivalent of our eyes, but picking up radio waves instead of optical waves. So that was the goal study the evolution. of the universe, but the signal from hydrogen is incredibly weak.

So in order to detect it in the, the time soon after the big bang, you know, over the huge distances that it has to travel, the telescopes had to be huge to detect this very weak signal. That’s sort of the motivation behind the journey that we set out on 30 years ago. And the design of those telescopes has now been  developed hugely from those early concepts to what we’re about to start constructing now.

 Jacinta: [00:15:20] So Phil, you, you mentioned sort of the epoch of re-ionisation studies,  and as to one of the main reasons why the SKA was originally sort of dreamed up. But of course there’s a lot of other sites that we will be able to do with it.

And the way it’s designed, it’s flexible to do quite a lot of different types of science. What are you most interested in personally? I mean, I know you’re not allowed to pick favorites in terms of the science goals, but you know, what is your background in science and what, what are you really interested to see what the SKA will find?

Phil: [00:15:50] Oh, I think  I’m allowed favourites. We have our veryhigh priority key science goals, which is understanding the epoch of reionisation, the Cosmic Dawn, and it’s using pulsars to probe fundamental physics and general relativity, gravitational waves. So those are fantastic goals. They’re not areas of science in which I have any expertise. I’m interested, but I’m not, I don’t have the expertise.

The areas that I am most interested in there’s two of them. One is molecular spectroscopy, molecular astronomy. So using the SKA to understand in detail, the nature of, and the physics of molecules in the universe, and the SKA will have the sensitivity to detect the weak emission from heavy bio molecules, the precursors to amino acids, you know, potentially enabling us to look for the signature of the origins of life out there in the universe.

So that’s one area that I’m keen on. Another is magnetism. Magnetism is… in colloquia and in seminars that are given in astronomy departments, there’s always some smart ass if I’m allowed to use that word…  puts his, or her hand up at the end of the seminar and says have you considered the effect of magnetic fields?

Because it’s hard and we don’t really understand the impact, the effect of magnetic fields on the various phenomena that we observe. We can see their effects on the strong sources that we can observe right now. But again, with the SKA, because of its unique sensitivity, we’ll be able to study magnetic fields and all sorts of phenomena and try to unlock how they influence the, the universe that we see.

And that  we live in.Those are my two favorite areas. 

Jacinta: [00:17:58] That’s a pretty good answer. Signs of life  and magnetic fields.  I actually made a  bingo card once for a conference I was at. And one of the things on there was have you considered magnetic fields? So the SKA will answer all of that. Dan you were going to say something.

Dan: [00:18:14] I was just going to say. So does your sort of current interests  in the SKA, how did you come to be involved in the SKA?  I mean, how long have you working here and what was your research?

Phil: [00:18:26] So I did my undergraduate degree in physics with astrophysics, the University of Leeds in the UK, way back before you two were born, it was 76 to 79.

I was an undergraduate. And then I went to Jodrell Bank, which is part of the University of Manchester to do my PhD. Yeah, as an interesting little connection. Of course the SKA headquarters is now at Jodrell Bank. So I’ve sort of had that connection through, through my history, but, but back back then SKA wasn’t even a concept.

Jacinta: [00:19:07] Neither were we!

Phil: [00:19:09] No! When did your PhD at Jodrell Bank, you either you either did hydrogen pulsars or interferometry. And I came in and I was most interested in the interferometry side of things. Having built a small solar interferometer as an undergraduate experiment. So I got involved in, in Merlin, the multi element radio, LinkedIn to from it and network at Jodrell Bank.

And was using that to observe the hydroxyl molecule in late type stars. So you can see why I have my interest in molecular astrophysics. It comes from those early days. I then got involved in very long baseline interferometry, which is connecting telescopes around the globe to get very high resolution observations, like a zoom lens.

If you imagine a single telescope being a wide angle lens, VLBI gives you that zoom lens ability to see the detail. And if you’re involved in VLBI, just because you have to talk to people at other observatories, you have to point your telescope at the same object at the same time, record your data with the same format.

You have to know what time it is. Of course you get to know a lot of people. And in those early days there, the software for VLBI was very limited. So I was involved in the science, but I also got involved in the software for VLBI. So I had that sort of joint science, technical interest, and I pursued that for many years.

And then there was this meeting in. Oh, the famous meeting for the one might say the birth of the SKA idea at Albuquerque New Mexico. It was a conference celebrating the 10th anniversary of the VLA. And that’s where the first paper was given that mentioned. At that time it was called the hydrogen array, which pulled together the ideas from various scientists.

I know I was around in, I was employed at NRAO at that time, but I wasn’t at that meeting and it wasn’t until many years later I figured out why. And it’s, it was staring me in the face. My son was born two days before that.

Jacinta: [00:21:27] Oh, wow.

Phil: [00:21:28]  So I had an excuse as to why, you know, because I know I was at the barbecue for the meeting, my wife and I took our son on his first outing when he was just a few days old.

And so for the next 10 years, I wasn’t really attached. I came back to the UK in 1919. Just as the SKA’s scientific the, what was called the international SKA steering committee was being formed. And this was one third us one third European, one third rest of the world. And at that time, actually, South Africa was not part of that.

It was pre the South African involvement and they had a meeting in Manchester because the IAU general assembly was meeting there. And I put my hand up to organize the meeting of the international SKA steering committee. And I was appointed to the steering committee as one of the two UK members. I was the director of Merlin at that time, I’d come back full circle back to the UK and.

How I really first got fully engaged. Of course I knew all about the SKA activities, but that’s when I first got fully engaged and then worked with various aspects. I’ve already talked for long enough, but yeah, the journey went on and on. And then in October, 2012, I was appointed as director general of the SKA organization, or then just a few months ago.

Inaugural director general of the SKA observatory. So absolutely privileged to be involved in the project. It’s been great.

Jacinta: [00:23:09] You skipped the bit where we met in Western Australia, Phil.

Phil: [00:23:13] Oh yeah. Well, yeah. I should have mentioned that Jacinta! Yeah. Well that’s when I was on sabbatical though. Wasn’t it?

That’s right. Yeah.

Dan: [00:23:26] Pretty nice though. That  you’ve been involved from the very birth, even if you missed the birth for another birth.

Jacinta: [00:23:33] What year was that Albuquerque meeting?

Phil: [00:23:36] 1990 October, 1990. My son’s birthday is the 6th of October. And this paper was given on the 8th of October.

Jacinta: [00:23:45] It’s his birthday present then?

Phil: [00:23:47] Pretty much, although I’m not sure he fully appreciates that.

Jacinta: [00:23:53] He’s not, he’s not an astronomer as well.

Phil: [00:23:55] No, no. He works in science communications, but actually you, I don’t know if you, you may have come across him Jacinta.

Jacinta: [00:24:01] Yeah. We’ve met ,we’ve met.

Dan: [00:24:04] And admirable career.

Jacinta: [00:24:06] So Phil you’ve been kind of involved in the SKA for so long, even since 1990.

How does it feel to right now be on the precipice of it? This thing is starting to actually be built. You announced , I think it was a couple of weeks ago that construction is approved to begin on the SKA. Finally, after all this time, how does that feel?

Phil: [00:24:25] Well, absolutely fantastic. The actual decision was made by the observatory council on the 25th of June, the second day of the two-day council meeting.

There was a third meeting of the observatory council, which of course built on many, many governance meetings in different organizations before that. And at the start of that week, I sent out an email to all my senior staff saying, right, for me personally, this is the most momentous week of my professional career.

And so let’s not let anything mess it up because  it was, almost a done deal as we entered the council meeting, but I  have enough gray hairs or lack of hair to know that something can always upset things. But luckily we’ve got through it all very smoothly. We ended up with a decision to proceed and actually 1st of July, everything kicked off.

And I should say that the team are already putting out market surveys, which is the precursor to going out for invitations to tender for companies to tender for the infrastructure work and software contracts and things like this. So we didn’t sit around and congratulate ourselves. The team got right into it.

They were raring to go. So, yeah, it’s a wonderful, absolutely wonderful feeling after all this time, you know, to be. Starting down that road to construction. And it’s, it’s not just me who feels that way because we’ve had a team within the SKA Observatory and across all the partnership, the global partnership. That’s been desperate for this decision for a long time. And I think. A sigh of relief that we’re finally there.

   Dan: [00:26:24] What are the big milestones? What are the future gray hairs?

  Phil: [00:26:28] Well, there’s always money. Of course. You know, one has to talk about money in these big projects and we’ve got a large majority of the money committed, but not all of it.

So part of my job is that I, I have a strategy, a funding strategy approved by the council to go out there and raise the minority of funds that we still need. So that I’m sure will add some gray hairs. I actually had a meeting this morning. About a groundbreaking ceremony or ceremonies, on the two sites.

So this is something we’re looking forward to quarter one of next year. It’s going to be complicated of course, by the pandemic situation, you know, whether we can get appropriate people to the sites, you know, with the appropriate gold plated shovels and you know, everything that you need to do for a groundbreaking ceremony.

So that’s sort of another milestone.

Jacinta: [00:27:27] Can we come?

Dan: [00:27:28] I was going to say, I’ll be there. I can hold a gold-plated shovel. No problem.

Phil: [00:27:34] Absolutely. It looked, these will be media events. Yeah. So im sure.

Dan: [00:27:39] Savannah podcast will be there.

Phil: [00:27:43] So that’s in the short term. And then of course we’ve got various construction milestones leading all the way up to sometime in 2028 or 2029, the completion of construction, we will be starting science observations. Well, before then, as, as we start to commission the SKA. Get scientists involved in early science. No guarantees it’ll be perfect. There is no instrument like this is ever perfect on day one. It takes many years to iron out all of the bugs, but we’re hoping to be delivering science well before the end of the decade.

Jacinta: [00:28:22] It’s so exciting.

Dan: [00:28:25] We’ve talked on this podcast a lot about the precursors to SKA and you know, MeerKAT and ASCAP and the MWA. And you say that there’s going to be a learning process in terms of getting these telescopes up and running. And a lot of that learning I imagine has already happened, which was the idea behind these precursors.

And with MeerKAT in particular, the SKA dishes. If I’m not mistaken additions to the array, does that speed the process up a bit? I mean, is there still complications in terms of that?

Phil: [00:28:58] There are so many complications because you know what we’re building is larger and next generation in terms of a lot of the digital hardware, the software, et cetera, but the precursors have been absolutely critical in terms of assisting in the whole program. Not least because, in both cases in South Africa and in Australia, the precursors landed on essentially virgin site. And established and develop the sites that SKA eventually will soon be built on. So that single aspect they’ve been critical.

But also if I just focus on MeerKAT, for example, and I think I’ve pronounced it correctly, your, one of your previous science ministers corrected my English pronunciation of MeerKAT and taught me how to say it properly. But the system engineering approach that was adopted by SARAO is something we looked at. We’ve learned from.

The SKA dishes are not identical. They’re slightly larger than the MeerkKAT dishes, but they’re also a bit lighter and I think they will come in as an considerably cheaper, but that’s because of the lessons learned through MeerKAT that have been transferred to the project. It’s many different aspects like that.

The software, I think is one of the key areas. The, the software developed not only to run MeerKAT, but to process the data that is finding its way into the SKA software. And very similar things are happening with ASCAP and MWA, different learnings from those projects are being incorporated into different aspects of the SKA.

So, and LOFAR as well as in the Netherlands and even Merlin the eMERLIN array. Yeah. We’ve learned a lot from them on time synchronization, over fiber optic systems and things like that. So, you know, we, we will take our learnings from wherever we can get it.

  Jacinta: [00:31:05] Yeah. We stand on the shoulders of giants. To change the topic a little bit.

Phil, you mentioned that these telescopes were built sort of on Virgin land in terms of, you know, the technology, but I know that you’ve also, the SKA organization has been very careful to engage with the local people, the traditional owners of the land on both sites with the Watjarri Yamatji people in Western Australia and the Koi and the San people here in South Africa.

Could you mention a little bit more about that?

Phil: [00:31:34] Sure. Well, we’re extremely conscious that we’re only going to be guests on these sites, guests of the governments, but also guests of the indigenous and the local communities. And we’re building this into our core values for the observatory.

We will absolutely be good neighbors in all respects. So yes, we are developing those relationships with both the Watjarri Yamatji and the sort of more diverse local communities in South Africa. But again, that is building on the work of CSIRO, ICRAR, that’s the Universities of Western Australia and Curtin in Western Australia and the federal government, and also the SARAO, SKA South Africa, National Research Foundation and the South African government have been doing in the Karoo.

So they again have led on the path in both of those engagements, we have watched and learned very carefully. We’re now getting engaged ourselves, but we’ll continue to work with both SARAO and CSIRO and ICRAR of course, in those future engagements. So it manifests itself in several ways. Where possible we want to engage with local companies.

In terms of construction contracts, there will be numerous contracts for the ongoing operations, maintenance services and things like that. So we want to be a good neighbor and make sure we work closely with the communities we want to get involved in the outreach and educational activities and things like this.

So, you know, we have a lot of thinking, a lot of planning around this. And we do watch and learn from other unfortunate experiences elsewhere in the world. That’s not the reason we’re doing it. We were determined to do this, before all of that happened. Yeah. It’s right at the heart of what we are as an observertory.

Dan: [00:33:43] Yeah, absolutely. It’s something we feel very passionately about too. I mean, both at the observatory and then personally, it’s really something which is pivotal to you. Interactions going forward and something which is astronomers really need to take consideration of in all of their activities. I think on that note, what considerations are being taken with regard to the SKA in terms of climate and sort of environmental impact?

Phil: [00:34:08] Yeah. Well, that’s a, that’s another, another aspect. So as well as being good citizens locally, we need to be good citizens globally. And every aspect of what we’ve been trying to do in terms of designing the telescope. We’ve been looking at long-term sustainability. Now that’s driven by two reasons. One is that sort of global good citizen aspect, but the other is more pragmatic.

We can design devices that use low power, a relatively cheap and long life. Then that assists us in terms of our costs, but also moves towards, you know, sustainability. We don’t have to replace systems as often. So we’ve taken good account of this in the design activities. Both of our sites are remote necessarily because they have to be away from people, but radio quietness. So power has been a big issue. And I have to say that 10 years ago, power was top one of the top things in my risk register. It really worried us how we were going to get the level of power we needed. So, first of all, in our design, we reduce the power requirements of the SKA by a factor. Through these design efforts, so that helped, but it didn’t solve the problem.

But in the 10 years, since we started the design activities, the solar power techniques and the systems and technology has improved vastly and also battery backup systems, and the cost has come down. So it’s now affordable. So the whole of the site, the SKA low site in Western Australia will be powered by solar power with battery backup.

We will, of course have to have diesel generators as the final backup, but we don’t anticipate using them in any routine sense at all. To ship diesel 350 miles out into the merchants. It is a ridiculous thing to do. And similarly in South Africa, we are connected to the grid and we will be looking at making sure the power coming in is as green as it can be.

But we’re also putting solar PV stations in some of the more remote dishes in the SKA mid array. And we’re looking at a longer-term future, which might have solar PV for the whole of SKA mid. That’s, something being looked at. It’s it’s not a certainty yet.

 Jacinta: [00:36:49] Thats awesome. I guess, astronomers know almost better than a lot of people that there is no planet B you know, we see a lot of science fiction, but you know, we’re looking, that’s part of what the SKA will do is looking for other habitatal planets and we know that there just isn’t one, this is it. And so we do have to take care of it. And also our South African listeners will be well aware of the power problems that we have here in South Africa. We have load shedding all the time, which is regular power outages. So I guess, you know, you wouldn’t want the SKA to be affected by that. So I guess you have to have these backup power options.

Phil: [00:37:23] Yeah, that’s exactly the case. We’re well aware of the pressures on Eskom on the South African power infrastructure. And we don’t want to add to that. I mean, we’re not going to be a big user in terms of some industries and populations. But still cost is a driver, but also sustainability as a driver and solar PV systems.

Now are very large scale systems, very comparable in cost to the traditional fossil fuel generated power, if not cheaper. So it’s a sensible way to go.

Dan: [00:37:57] That was presumed. And you’re going to get better as we get into second phase and stuff.

Jacinta: [00:38:02] What is the difference between phase one and phase two of the SKA and will other African nations be involved in phase two?

Phil: [00:38:09] So phase two is our longterm goal to true aspiration. And it’s not something that’s fantasy because I have government members who are always. Not always, but to ask me on occasion, what is the timetable for phase two? Do you have a cost estimate? We’ve given them a cost estimate, which is large based on concept engineering studies and the timescale is definitely after phase one.

Governments want to see that we can build the first phase because what our plan is for phase two is something that is of order 10 times larger. So maybe two thousand to two and a half thousand dishes across Southern Africa, not just South Africa, but Southern Africa, all the way up to the equator and similarly large expansion of the SKA low in Australia.

And so necessarily if we, in Africa, in particular, if we spread across the Southern half of the continent. We will need to involve and engage with other Southern African countries. The South African government has strong links and connections and arrangements with eight African Southern African countries.

And they are not formally part of the SKA observatory, but at the time that we expand, we’ll have to talk to them, bring them into the observatory in some form, but that’s for the next director general, that’s not going to be my job.

Jacinta: [00:39:49] Dan and I might throw our hat into the ring.

Dan: [00:39:53] Ooh. I don’t know. I quite like the color of my hair.

I was about to ask on that. You’ve presumably had a lot of experience and now international diplomacy. It’s a hugely international project with many international partners and the current era there’s increased nationalism and issues like that. Something like the SKA. Do you see it as a sort of vessel of peace or some way to bring countries together?

Phil: [00:40:22] I do, I honestly do. It’s projects like it because we’re, we’re not alone in global scales where we’re relatively small scale activity compared to the many of the other things out there. But what it does is it brings a diverse range of countries. Government officials from those countries, scientists from the countries, they sit around the table and they solve problems jointly.

They work together. They provide resources to the project and it’s like the analogy I gave with very long baseline interferometry earlier, where we had to get telescopes to record data in the same format at the same time, from the same object. Here we have to have dishes built in one country, integrate with software developed elsewhere and receivers from another country, plug in and the whole package has to work seamlessly.

So we’re working on a very detailed level with scientists and engineers and companies in those different countries. And then on a governance level, all of the countries, once they are members. They get an equal voice in how all of this happens. They get to guide the policy, they get to work together. And so a project like SKA and you know, ITER you know, the big nuclear fusion power project in Southern France, space agencies and things like this.

These are all key elements in governments that might have trade conflicts, even, much more serious conflicts happening. They continue to work together and, and I think it helps do you know, the project Sesame. You should look it up. This is a fascinating project. So it’s, it’s a small scale accelerator.

Built in the middle east. And it has countries like Jordan, Egypt, Israel, Lebanon, Syria, et cetera, involved doing science on this accelerator, the synchrotron, I think it’s the synchrotron acceleraor. There’s purely civil science, but these countries in other regards are in serious conflict are working together on a scientific project.

And it seems like they said that a wonderful, very long baseline interferometry in the sixties was one way in which the Soviet Union. And the Western powers, primarily the U.S engaged in low-level dialogue or through scientific exchanges. And I’m not saying it caused the wall to come down, but it was one element of that sort of soft diplomacy, that connection between countries. So I feel very passionately about this as I hope you can tell from what I was saying.

   Jacinta: [00:43:24] Yeah, that’s really awesome, Phil. And we say this on the podcast all the time, but we’re all under one sky. And that’s really what unifies us as humans on this planet. You know, we’re all under one sky. So the SKA telescope can really unite us in its findings because it belongs to all of us really.

So, Phil before Dan and I consider applying for your job when you’re ready to move on, or to retire. Tell us what actually does it mean to be direct to general and like, what do you do as part of this role and how does it feel.

Phil: [00:43:54] Well, it’s a wonderful job. It’s the best job I’ve ever had. And it’s a, it’s a privilege that the board previously and the council have trusted me to have this role of director general for 10 years or so. And actually to continue for a while longer. What do I do? And I spend a lot of time, you know, pragmatically daily, a lot of time on the phone, on email and more over the last year on zoom. A lot of it is about communication. It’s there is that diplomatic aspect and it’s staying engaged with the senior stakeholders in the various partner countries, because they all come at it with slightly different perspectives, slightly different goals, depending on their national situation and national agendas, and it’s pulling all of this stuff together to make the whole thing work. And then to work with my team, Joe McMullin, my deputy who runs the, what we call the program, the technical activities. Simon Berry, who is, is the main person looking after international relations.

And, you know, then, then Caroline Whiteley who runs the finances, they’re just three members of a broader team that I interact with also on a daily basis to make sure the mechanics of things are working smoothly. Because if there’s a problem there, I often have to get on the phone or email with, with one of the governments to try and sort out particular things.

Sometimes there are conflicts to resolve. Sometimes I have to take decisions that some people are unhappy with, but you have to move the project forward. And the secret is maintaining the relationship, even when the tough decision has to be made. And some, sometimes it’s, it’s hard, but I sleep well at night generally because I know we’re doing the right thing here and that the project’s moving forward.

Dan: [00:46:02] Thank you once again for your time and for explaining your view on the SKA and the experience that’s been for you. I think just taking us on that journey has been very special. The journey will be passed on now to the younger generation, and perhaps you have a couple of messages or to the listeners or to the younger generation as hard to take this forward and what you’d like to pass on.

Phil: [00:46:25] Well, first of all, I wish I was 40 years younger and just starting out on my career because. I don’t know, you may have heard me say this in talks I give, but I am envious of what the future is in astronomy and science in general, for the younger generation. The facilities, the techniques that will be available to them are truly wonderful.

So if I was in that situation, and looking to be engaged in a project like SKA. I mean, first of all, it’s for the scientists, it is the science. I mean, choose your subject. Well, I would say don’t confine yourself to an area that limits you to one telescope or one facility. You should be looking at the world of astronomy and the various facilities that are available to you and, and be bold.

Be bold. And the ideas that you have, but make sure you’ve got the right skills. So it’s not just, you know, the physics or the chemistry or the, the astrophysics side of things. These days. It’s very much understanding the data as well. The data science is a key element of what the younger generation will be involved with much more so than my generation.

We thought we were overwhelmed with data. Thats not the case, but also the skills that the younger generation will gain in preparing for these things will also serve them if they decide to move on elsewhere in society, because society is becoming data rich and somebody skilled in data informatics and things like that, will be able to get a job anywhere, but, you know above all. I dunno, how many of your, what age profile your listeners are, but stay at school, do the tough subjects. The maths, the science, the engineering, the technical stuff. It’s fun and it’s easier than you think it is. It also opens up a whole world of opportunity, which is really what we’re all after we want a fair crack of the opportunities in front of us.

So, maybe that’s my, my message to the young listeners. Sorry. If I sounded as if I was preaching a bit,

Jacinta: [00:48:53] Not at all. Thank you so much Phil, for that. And I’m hoping that you’ve inspired many, a young listener to get involved in stem subjects and get involved with the SKA. Where can our listeners find out more? How can they follow you on social media and learn more about the SKA.

Phil: [00:49:11] So I do have a Twitter account, which, I tend to keep fairly factual. There may be the occasional football comment on that.

@SKA_DG. Of course the SKA observatory has its own Twitter, Facebook, Instagram, YouTube accounts. We also have a website which is currently being revamped from the ground up the website’s 10 years old now, and we’ve taken the opportunity of moving across to the SKA observatory to revamp that. So I don’t know what the new website URL will be, but the current one is SKA I’m told the new website will be, exciting.

Dan: [00:50:01] Yeah. Thank you so much for joining us, Phil. I mean really some inspirational words and really special to hear from you. One last question from me is have you considered magnetic field?

Jacinta: [00:50:11] Lame Dan, lame.

Phil: [00:50:13] Wait 10 years, wait 10 years.

Jacinta: [00:50:21] All right. Thank you so much, Phil. And this has been really awesome to talk to you. Thanks for joining us on the Cosmic Savannah.

Phil: [00:50:27] Thank you. I’ve enjoyed it.

Dan: [00:50:36] Okay. So, the awkward news is, that Italy won on penalties

Jacinta: [00:50:43] oh dear

Dan: [00:50:46] I mean I haven’t checked the news since Like I don’t know what’s happening with the SKA

Jacinta: [00:50:55] We jest, we jest. Of course they’re still in!

Dan: [00:50:59] But yeah I mean great to chat to Phil. Really a momentous achievement to get the SKA to this point, we’ve been talking about it for years. He’s been talking about it for decades and for it to finally be in construction. And I mean, in my email, I’m seeing the tenders going out for people to build infrastructure and roads and it’s really  happening now.

Jacinta: [00:51:23] That’s hectic.

Dan: [00:51:23] Yeah. So an incredible achievement, it is going to be a very exciting telescope and experiment for many, many years. But yeah. Great to speak to Phil and to mark this occasion, I think that we should all be very proud of how far we’ve come in the astronomy  community.

Jacinta: [00:51:43] And I can’t wait to see where we going. It’s going to be so exciting.

All right. Well, this episode is long enough, so I think we can end it there and we will be back in a fortnight, hopefully with some more cool stuff coming from Africa.

Dan: [00:52:00] Yeah. Thanks again very much for listening and we hope you’ll join us again. On the next episode.

Jacinta: [00:52:05] You can visit our website,, where we’ll have the transcript links and other stuff related to today’s episode.

Dan: [00:52:13] You can follow us on Twitter, Facebook, and Instagram @cosmicsavannah thats spelled S A V A N N A H.

Jacinta: [00:52:21] Thanks today to professor Phil Diamond for speaking with us.

Dan: [00:52:24] Thanks to our social media manager Sumari Hattingh.

Jacinta: [00:52:27] Also to Mark Allnut for music production, Jacob Fine for sound editing me. Michal Lyczek for photography. Carl Jones for astrophotography and Susie Caras for graphic design.

Dan: [00:52:38] We gratefully acknowledge support from the South African National Research Foundation and the South African Astronomical Observatory, as well as the University of Cape Town Astronomy Department.

Jacinta: [00:52:47] You can subscribe on Apple Podcasts, Spotify, or wherever you get your podcasts. And we would really appreciate it, if you could rate and review us and recommend us to a friend.

Dan: [00:52:56] And we’ll speak to you next time on The Cosmic Savannah.

It’s really, really happening now.

Jacinta: [00:53:06] Oh that’s hectic!

Dan: [00:53:07] Is hectic a South African term?

Jacinta: [00:53:09] Yes! I was trying to impress you! 

Dan: [00:53:12] You’ve become South African! I was like hearing you say that. I was like what? Oh my gosh, you’re coming across to our side.

Jacinta: [00:53:20] I have been here for a while Dan.

End of podcast:

365 Days of Astronomy

The 365 Days of Astronomy Podcast is produced by Planetary Science Institute. Audio post-production by Richard Drumm. Bandwidth donated by and wizzard media. You may reproduce and distribute this audio for non-commercial purposes. 

This show is made possible thanks to the generous donations of people like you! Please consider supporting to our show on and get access to bonus content.