This blog post is going to be a little different than my previous ones, so bear with me as I tread on new ground. I wanted to cover a little of what life is like down here in McMurdo Station while we’re launching our balloons for the Long Duration Balloon campaign here on the Ross Ice Shelf. My opening photo for today was taken from the top of Observation Hill, which is a 750-foot summit that overlooks McMurdo Station, and it took me about 45 minutes to climb one way, so enjoy! Now back to ballooning…
When we launch from most other locations around the globe, we have pretty set times for conducting our launches. In Fort Sumner, New Mexico we pretty much show up at about 3 a.m. for all attempts. With the very rare exception, we might have a night launch opportunity, but those are few and far between. In Palestine, Texas, where the Columbia Scientific Balloon Facility is located, we launch balloons in the late afternoon which gives us pretty consistent night flight opportunities. All of this is really dependent on the prevailing winds at that time of the season. Esrange in Kiruna, Sweden and Wanaka, New Zealand (Spoiler: this is where the next series of blogs are going to come from!) aren’t quite as predictable, but are usually around the same time of day.
But here in Antarctica, the winds and weather are not nearly that predictable. So far this campaign, we’ve shown up at our camp for multiple launch attempts at 11 a.m. in the morning, 7 p.m. in the evening, and most recently we’ve been leaving at about 1-3 a.m. If this schedule sounds a little rough, well, that is because it is. I’ve already talked a little bit about SuperTIGER’s delay that was four hours, so even when trying to predict a start time that doesn’t mean the weather is going to cooperate.
As far as getting around, this place is like an off road testing facility of continental sized proportions! I’m not going to be able cover every type of vehicle that is roaming around down here, but I CAN show you some of my favorites! Since Christmas, we’ve essentially been working straight nights to conduct our launch attempts. Mostly, we’ve left McMurdo Station in a couple of off-road vans and a Delta shown above. As you can see in the picture, it’s a really big off road vehicle. Most of them down here were turned over to the National Science Foundation (NSF) when the U.S. Navy gave them the facility. So that shows that they were built to last and to take a beating.
When our schedules are a little more consistent, we get a ride from the United States Antarctic Program Shuttles Operations team for our daily commute. The Shuttle Ops team has a few different vehicles they use for our daily transport, but the most iconic is “Ivan the Terra Bus.” Ivan was also made by the same company that continues to provide the DELTAs.
And if you truly need to go where no one has gone before, you can take a Tucker Sno-Cat. I haven’t had the “pleasure” of riding around in one of these, but apparently they are a pretty rough and energetic ride. Oh, and loud. Really, really loud for the passengers. But since they are a treaded vehicle, they really don’t need roads to get where they’re going.
Like I said at the start, this isn’t my usual forte for my blogs, but the engineer in me is always fascinated by big machines that work in extreme environments. And here in Antarctica, everything has to perform or none of the amazing science that is done here would be possible. I have to also say that the support we get from NSF and their team makes all of our launches possible and we wouldn’t be able to launch our balloons without them. Thanks again for checking in and I hope you liked this glimpse into our daily lives here.
As we were finishing up the preparation of the sleds used on the 88S Traverse, we realized that we were missing a couple of fittings that pair our propane tank to 2 Coleman cook stoves. It seems like a small part, but that part is fundamental in allowing us to cook meals while simultaneously melting water to stay hydrated. So we were stuck…
We called the science-support crew in McMurdo that had the fittings and they tried to get the part on the next plane to the South Pole. That plane would be the last one to arrive before a long 2-day break associated with the New Year holiday. The science-support crew in McMurdo went so far as to chase down the vehicles headed to the airfield to hand them this part! But they couldn’t chase them out onto the ice shelf, to the airfield associated with aircraft equipped with skis. So we ended up spending New Year’s Eve at the South Pole.
While time at South Pole is arbitrary, the convention here is to be on New Zealand time, primarily based on the air support through Christchurch. About a couple hundred yards from Amundsen-Scott South Pole Station is a large camp associated with expeditioners that come to the South Pole, with a commercial logistics provider. Their air support is through South America. Thus, people that are just a couple hundred yards celebrated the New Year 16 hours apart.
The coolest thing about spending the New Year at the South Pole is the 1 January ceremony to place a geodetic benchmark on the geographic South Pole, or 90°S. Ice sheets are dynamic; they move under their own weight very slowly, like thick maple syrup moving toward the edge of your pancakes. Thus, South Pole Station is slowly moving away from the geographic South Pole. Every year, on the first of January, a new benchmark is placed on the surveyed geographic South Pole. The benchmark itself is designed by the science-support crew that spends the long, isolated winter at the station, ensuring that continuous scientific observations are kept running!
The old benchmarks are removed and put on display inside the station. They often represent current happenings at South Pole Station, such as the year that the new station was completed. The older benchmarks contain the names of the US Geological Survey personnel that used to come down and survey the geographic South Pole; I used to work with many of those folks and it was pretty cool to see their names again! The newer benchmarks often contain the names of all of the winter-over science-support personnel, or the folks that designed the new benchmark.
For the past couple years, we have conducted a 450-mile ground-based traverse collecting highly accurate GPS elevation data. These data have been used to validate elevations from NASA’s ICESat-2 satellite mission. You can see videos from the previous 2 traverses here and here. And you can see results from the previous traverses here.
Over the past three weeks, we have traveled quite a bit to get to the South Pole. We started in Maryland and flew via commercial airlines to Christchurch, New Zealand. We spent a couple days in Christchurch, where we were provided with special clothing for the extreme cold temperatures of Antarctica. Next, we flew from Christchurch to McMurdo Station, Antarctica, on a New Zealand military C-130 aircraft. That was about a 7-hour flight, with pretty modest accommodations. We spent about a week in McMurdo collecting the gear that we will need for the traverse, such as sleeping bags, tents, radios, etc. Once we had (most) of our gear, we flew from McMurdo Station, which is on the coastline, to Amundsen-Scott South Pole Station, which is in the center of the Antarctic Ice Sheet. That was aboard a US Air National Guard LC-130, which is an aircraft equipped with skis, for landing on the ice sheet.
One comment about the South Pole: It’s very high. We are at about 9300 feet above sea level, but the dryness makes it feel more like 10,000 feet or even more, depending on the barometric pressure. Thus, the first few days here are very challenging as your body tries to acclimatize to the altitude. In general, after we arrived, we took it very easy.
Once we arrived at South Pole, we started to rig up our sleds for the traverse. The 88S Traverse is a two-week endeavor using tracked vehicles called PistenBullys to haul sleds that contain all of our equipment needed to live and work on the Antarctic Ice Sheet. The sleds carry our sleeping and eating tents, fully deployed, so we set up camp just once for the entire 2-week traverse! The sleds also carry the survey-quality GPS instruments that we use to collect the elevation data. GPS units in your car are accurate to about 10 to 15 feet. The GPS units that we use are accurate to well within an inch!
The Antarctic summer field season is from about late October to about early February, with the warmest part being in early January. As such, we spent Christmas here at South Pole. The folks here on station do an amazing job to make the holiday great, even though folks are thousands of miles from family. The galley does an especially great job; Christmas dinner was fantastic. The next day, the station hosted the annual Race Around the World, which is a roughly 2-mile running race that intersects every line of longitude. The male winner and the female winner earn a 10-minute shower here at Pole, which is a luxury relative to the usual 2-minute showers that we are allowed, twice a week. Two of the 88S Traverse team members ran the race; Thomas came in second, earning a 5-minute shower!!!
I realize that, you know, its New Year’s and all. But while everyone is waiting for that big ball to drop in Times Square, here outside McMurdo, we’ve been working to send balloons UP! We just had a super successful launch of a 0.6 million cubic foot (MCF) balloon. Now, for us at in the Balloon Program Office, that’s a pretty small balloon; we generally launch balloons that are anywhere from 4 to 39 MCF. But the 0.6 MCF platform gives us a capability to support a whole lot of scientists that have small and very sensitive instruments with the ability to go where only we can take them. Up above you can see how these small balloons look just prior to launch.
This flight really supported two missions for us. First of all, the instrument that we launched on the balloon was a part of a program ran by Dr. Robyn Millan at Dartmouth College. Robyn and her team are using the BARREL instrument to study electron losses from the Van Allen Radiation Belts. The instrument is able to capture when electrons literally fall out of the sky and measure their energy. One of the big things that their work will help everyone with is how to better protect satellites from the radiation in space.
The second thing we want from this launch is for the balloon to be a pathfinder for a future NASA Explorers Program mission. We will use the trajectory that this flight follows, a similar flight from last year, and another follow on flight scheduled for next year to help bound the expected flight path for the future GUSTO mission. GUSTO will be studying emissions from the particles that are in interstellar (between the stars) space and help shed light on the lifecycle of stars in our galaxy.
Now, I realize that 0.6 MCF is a pretty abstract number, so for those of you (like me) that think in real dimensions I wanted to give you an idea of just how “small” these balloons really are. When fully inflated, the 0.6 MCF balloon is 72.5 feet by 124.5 feet (yes, I said feet), and it quite frankly looks like a pumpkin! So if you take your average pumpkin from October and make it 55 times bigger then you have a 0.6 MCF balloon. Easy, right? Another way to visualize it is if you took three full sized school buses and put them end to end, then that’d be the diameter of this balloon. Sounds pretty small to me.
I also want to circle back to that “pumpkin” shape I mentioned earlier. Another thing that made this launch super was that this was a Super Pressure Balloon. This design of balloon actually maintains constant pressure during its entire flight (just like a party balloon), and that gives us very good altitude stability during day and night transitions and long flight durations. Our record from last year’s Antarctic campaign was 73 days.
My picture today is of the BARREL instrument at the foot of our flight line with Mt. Erebus in the background. And if you look behind BARREL, the red plastic on the ground is our balloon in its covering that protects it while we lay it out prior to launch. Thanks again for checking out my Notes from the Field: Balloons for Science blog. And most importantly, have a happy New Year!
December 18th, 2019 by Andy Hynous, NASA Balloon Program Office
Welcome again to below the 77th parallel. I know it’s only been a few days since my last post went live, but I have some great news from WAY down south. Today, I wanted to cover the picture-perfect launch of the SuperTIGER mission from our Long Duration Ballooning Camp from here outside McMurdo Station, Antarctica.
On the 16thof December, we left McMurdo Station at 1 p.m. to catch a ride to our camp for a 10 p.m. launch attempt. Once we got there, our Weather Wizard (most people would call him a meteorologist, but what he does seems like magic to me) told us that the time we could launch the balloon would be later than we thought. How much later you ask? Try four hours later!! So with that bit of good news, the launch crew and science team that were there to support launch did what they could to get ready and then we waited. Once we finally had a handle on how the winds were blowing, we started our launch operations. Aside from the delay, everything went as smooth as silk.
The fist picture shows the SuperTIGER instrument on our Mobile Launch Vehicle. Because we like our acronyms so much, we usually just call it the “MLV.” The first thing that is done on a launch day is we take the instrument out and put in on our launch vehicle so the science team can make some final checks of their communication systems. Down here in Antarctica, we use a lot of satellite radios for transmitting the data from the instrument back to the computers that the scientists use to do their work. All of this happens on the launch vehicle.
The second picture shows SuperTIGER, the almost quarter mile flight train, and the very top section of the balloon waaaaaaaay in the back! Between SuperTIGER and the balloon is all the equipment we need to make the mission safely fly. There is a parachute, some more communication systems, and other stuff that allows us to track the balloon and make sure that it’s flying just fine.
The last photo for today is from the actual launch right after the balloon was released from the ground. It was a bit of a cloudy day, but for us all that really matters is that the winds aren’t too strong.
I know… I know… Enough of this launch stuff, now you want to know what SuperTIGER does. Well, once again I’m just completely blown away but what our scientists can do. The SuperTIGER instrument is trying to see what kind of elements (like hydrogen, helium, iron… Stuff from the periodic table) are created when stars go supernova. SuperTIGER is primarily wanting to measure elements that are heavier than iron. The scientists that are taking these measurements are trying to understand how our own (home, sweet home) solar system was made. In the words of the principal investigator Brian Rauch: “It is true that the information we gather will help us understand how the stuff that we, our world, and indeed the rest of the visible universe are made of is created from the basic building blocks left over from the Big Bang. We are after all made of star dust, and we are measuring individual pieces of that.” That’s pretty out of this world if you ask me!