Published in the Antarctic Sun
In the next few days, a giant floating bubble will appear over Williams Field and climb high into the heavens. It will circle Antarctica for about two weeks, and return to Earth nearby.
The bubble is a helium-filled balloon 100 feet tall. It will carry a scientific payload almost 24 miles into the sky, from which altitude it will still be visible to the unaided eye.
The Flare Genesis Experiment, as the project is called, is looking at the origin of solar flares to determine what causes them. What is known at present is that flares emerge from sunspots in which the magnetic field changes, becomes unstable and erupts in a flare.
“We want to know how flares are born,” said David Rust of Johns Hopkins University’s Applied Physics Laboratory, the lead scientist on the project.
Using the 32-inch solar telescope, the second-largest in the world, Rust and his team can look at sunspots very closely.
By measuring the polarization and shifting wavelength of the light emitted from a specific sunspot, Rust and his team can calculate the magnetic field acting on the area.
He and others have spent 25 years trying to put together a space mission to do this work. It would cost $800 million, though it would yield years of observing opportunities from a space vehicle.
The balloon launch, on the other hand, costs $16 million for about two weeks of observing the sun. The last time the telescope went aloft, in 1997, it stayed up for 18 days.
The scientists are supported by the NASA-funded National Scientific Balloon Facility, based in Palestine, Texas. The facility takes care of elements of the project apart from the telescope and its housing.
“We provide the vehicle, we provide the telemetry system,” said Steven Peterzen, the NSBF’s on-site coordinator. The facility’s staff also rigs the balloon, performs the launch, monitors the flight, and pops the balloon to end the flight. But even then, the job isn’t done. The payload’s valuable instrumentation must be recovered.
“We do this all over the world,” Peterzen said. Antarctica is a good place to send up balloons because of the emptiness of the space, but more importantly because of the regular wind pattern
which stabilizes over the continent in midsummer. The balloon, when launched from Williams Field, will circle the continent and most likely return nearby, to be brought down on the Ross Ice Shelf for easy recovery.
During the first 20 hours of the balloon’s flight, the scientists can communicate extensively with the payload because it is within line-of-sight. They run tests to be sure everything is working
properly, and collect some early data. All data is stored on board for the duration of the flight.
After those first hours, though, the balloon and its payload are only reachable for a few minutes every couple of hours. If something goes wrong, the scientists can load all of their equipment into
the back of an LC-130 and fly closer to the payload, to regain line-of-sight communications.
The NSBF team at Williams Field has enough equipment to have the two balloons in the air at once, though that has never happened before in Antarctica.
They can only have one at a time in line-of-sight, though, meaning a second launch can follow the first only after a day or two.
Later this season a similar launch will lift a project run by a research team led by scientists at the University of California-Berkeley and the University of Washington, who didn’t even expect
to launch their project in Antarctica this season.
They had hoped to launch in Alaska last June, but were unable to. Then, in August, they got a phone call: Another group wasn’t ready to come to Antarctica.
They scrambled to make the trip, helped by the fact that they’d never really unpacked in June.
“It was all still in boxes,” said Robyn Millan, a graduate student at UC Berkeley’s Space
Sciences Laboratory.
The instruments will show them more about aurora, the ghostly lights in the sky at high latitudes. Aurora are caused by electrons from space entering the Earth’s atmosphere. They release energy in the electrically-charged areas of the upper atmosphere, emitting visible light and X-rays.
The balloon’s altitude allows X-rays to be observed before they are absorbed by the atmosphere. The balloon also allows a relatively heavy payload to be launched, as compared with satellites, where weight is at a premium.
Further, while a satellite moves very quickly through a large range of areas, a balloon stays relatively stationary.
This permits the researchers to determine whether what they observe is related to the location of its observation or the time of the event.
Millan emphasized the academic value of a balloon-based project, which has a slower timetable than a satellite mission. The extra time lets students take a more active role in the work. They build the equipment, receive the results and analyze the data within the time frame of an advanced degree program.
Also on the X-ray payload is what is called a “piggyback” experiment, using space and weight within the allowed limits but unused by the primary research.
NASA is testing shielding materials for space vehicles. Some payloads have been “fried” by the solar energy, which can be absorbed into the payload vehicle and cause overheating of components.
Sunday, December 26, 1999
Sunday, December 12, 1999
Out on a wire: Electronics techs keep McMurdo grounded
Published in the Antarctic Sun
Airplanes are flying and weather reports are coming in. Making it all possible are a small group who have their feet firmly planted on the ground.
Behind the scenes of the weather and air-traffic-control operations in Antarctica is an unsung team of electronics technicians who keep all the equipment running properly.
They’re part of the Aviation Technical Services contingent in McMurdo Station. Led by Mike Rugg, the team has two major elements.
Out at the airfield, there are the “Ice Elecs,” who keep the radios and navigational instruments working for the proper operation of the airport. They also maintain the weather equipment that records conditions at the runway, which often differ greatly from the situation in town.
And in MacTown, there are the “Mac Elecs,” who work with the air-traffic-control and weather instrumentation here and across the Ross Ice Shelf.
“It’s probably the best job on the continent,” said Jon Shields, the supervisor of the team in town.
They travel to Williams Field and automated weather system sites, he said, to install and maintain equipment. They also have some flexibility about where they work. Devices need to be
checked in a number of nearby locations. Shields likes being able to choose where he’ll stop by next.
Like a lot of material in Antarctica, the equipment isn’t necessarily all that modern, but it’s functional and durable, which is more important.
A few years ago, one team’s members invented and built an instrument for the air traffic control group. There’s no book for it, and no spare parts. But it’s still working.
Even for things which do have manuals, the parts occasionally aren’t handy. Technicians sometimes have to look at the spare bits and pieces they have lying around and make repairs with them.
In addition to repairs, the electronics technicians have recently been installing automated weather stations around the Ross Ice Shelf to help meteorologists measure and predict weather at McMurdo and the airfield.
They put in 10 stations last week after waiting two weeks for the weather to clear enough to fly. One of them took seven hours to put in, drilling and chipping through ice, but most of them take
between 60 and 90 minutes, since they’re installed in snow.
In preparing to move the airstrip from the sea ice to Williams Field, the runway technicians have been setting up and testing the navigational aids pilots need to land and take off.
“Things have been going pretty well,” said Larry Lainey, the team leader at the runway.
Lainey is happy that they now have two control towers and two navigational beacons. It means they’ve had a spare of each this season, and will have a spare when the move to Williams is complete.
But the crucial difference, Lainey said, is that they can have both runways fully functional at the same time when the move is taking place. In previous years, they’ve had to take down the control equipment at the sea ice runway, move it to Williams, and set everything up again.
Now they can set things up at Williams Field ahead of time and be ready when the move happens.
Weather is a factor in this, too. While the buildings are being dragged to their new location, they have no heat. This can cause problems trying to use the equipment right away in the new site.
“Electronic equipment works a whole lot better when it’s had a chance to warm up and get to a stable temperature,” Lainey said.
The electronics technicians have an unusual job, in that if they do their work properly, nobody knows they work; all the instruments just run well. But when things go wrong, they’re the ones in demand. Usually things work well, but it’s rarely just one piece of gear which goes down at a time.
“Everything breaks at once,” Shields said. But then, usually, it gets fixed quickly and the technicians can return to maintenance, upgrades and new installations.
Airplanes are flying and weather reports are coming in. Making it all possible are a small group who have their feet firmly planted on the ground.
Behind the scenes of the weather and air-traffic-control operations in Antarctica is an unsung team of electronics technicians who keep all the equipment running properly.
They’re part of the Aviation Technical Services contingent in McMurdo Station. Led by Mike Rugg, the team has two major elements.
Out at the airfield, there are the “Ice Elecs,” who keep the radios and navigational instruments working for the proper operation of the airport. They also maintain the weather equipment that records conditions at the runway, which often differ greatly from the situation in town.
And in MacTown, there are the “Mac Elecs,” who work with the air-traffic-control and weather instrumentation here and across the Ross Ice Shelf.
“It’s probably the best job on the continent,” said Jon Shields, the supervisor of the team in town.
They travel to Williams Field and automated weather system sites, he said, to install and maintain equipment. They also have some flexibility about where they work. Devices need to be
checked in a number of nearby locations. Shields likes being able to choose where he’ll stop by next.
Like a lot of material in Antarctica, the equipment isn’t necessarily all that modern, but it’s functional and durable, which is more important.
A few years ago, one team’s members invented and built an instrument for the air traffic control group. There’s no book for it, and no spare parts. But it’s still working.
Even for things which do have manuals, the parts occasionally aren’t handy. Technicians sometimes have to look at the spare bits and pieces they have lying around and make repairs with them.
In addition to repairs, the electronics technicians have recently been installing automated weather stations around the Ross Ice Shelf to help meteorologists measure and predict weather at McMurdo and the airfield.
They put in 10 stations last week after waiting two weeks for the weather to clear enough to fly. One of them took seven hours to put in, drilling and chipping through ice, but most of them take
between 60 and 90 minutes, since they’re installed in snow.
In preparing to move the airstrip from the sea ice to Williams Field, the runway technicians have been setting up and testing the navigational aids pilots need to land and take off.
“Things have been going pretty well,” said Larry Lainey, the team leader at the runway.
Lainey is happy that they now have two control towers and two navigational beacons. It means they’ve had a spare of each this season, and will have a spare when the move to Williams is complete.
But the crucial difference, Lainey said, is that they can have both runways fully functional at the same time when the move is taking place. In previous years, they’ve had to take down the control equipment at the sea ice runway, move it to Williams, and set everything up again.
Now they can set things up at Williams Field ahead of time and be ready when the move happens.
Weather is a factor in this, too. While the buildings are being dragged to their new location, they have no heat. This can cause problems trying to use the equipment right away in the new site.
“Electronic equipment works a whole lot better when it’s had a chance to warm up and get to a stable temperature,” Lainey said.
The electronics technicians have an unusual job, in that if they do their work properly, nobody knows they work; all the instruments just run well. But when things go wrong, they’re the ones in demand. Usually things work well, but it’s rarely just one piece of gear which goes down at a time.
“Everything breaks at once,” Shields said. But then, usually, it gets fixed quickly and the technicians can return to maintenance, upgrades and new installations.
Sunday, December 5, 1999
Mac Center, nerve center
Published in the Antarctic Sun
Attention aircraft over Antarctica: this is where to report. Passengers and crews on U.S. planes and helicopters anywhere on the Ice rely on Mac Center for safety and information.
When things are going well at McMurdo Station, Mac Center is hopping. Helicopters and fixed-wing aircraft over much of the Antarctic continent are controlled from a small room in Building 165.
When things are going badly, the search-and-rescue team gathers here, as does the mass-casualty response team.
But most of the time, work at Mac Center is about air traffic control. Three thousand square miles of area, from sea level up tens of thousands of feet, are kept in order at Mac Center. And without radar, the controllers have to keep a mental picture of this huge region in their brains.
There are large areas of Antarctica which don’t have air traffic control, but the people in Mac Center have to keep tabs on those areas as well, since many of the planes crossing the continent fly through its area of control somewhere on the flight path.
Flights from Africa to Australia and New Zealand routinely cross Antarctica on great circle
routes; Qantas, Australia’s airline, offers sightseeing flights over Wilkes Land which sometimes
brush the edge of Mac Center’s responsibility range.
Juggling radios, telephones, and pencils, the people who work in Mac Center track everything, in their heads and on paper. There are route-checkpoint forms, radio-contact forms and weather updates which shuffle past the control desk.
“You have to do all this for each plane,” said air traffic control manager Dave Ferguson, gesturing at a set of papers including a long form with spaces for weather conditions, time, and flight direction, among other data.
It’s not self-contained. Telephone calls have to be made to Auckland when planes fly across 60 degrees south latitude, the northern boundary of Mac Center’s responsibility area. Pilots and controllers depend on reports from Mac Weather, the field camps and aircraft in the air for flying condition information.
Tapes are rolling the whole time, too. They’re used for quality control and for training, as well as providing backup in the event of an emergency, so investigators can try to piece together what happened.
Even when most of the planes are on the ground or out of Mac Center’s airspace and things are a bit slow, it is not the time to slack off. Someone might radio in any minute, needing information or help. Mac Center stands by.
Attention aircraft over Antarctica: this is where to report. Passengers and crews on U.S. planes and helicopters anywhere on the Ice rely on Mac Center for safety and information.
When things are going well at McMurdo Station, Mac Center is hopping. Helicopters and fixed-wing aircraft over much of the Antarctic continent are controlled from a small room in Building 165.
When things are going badly, the search-and-rescue team gathers here, as does the mass-casualty response team.
But most of the time, work at Mac Center is about air traffic control. Three thousand square miles of area, from sea level up tens of thousands of feet, are kept in order at Mac Center. And without radar, the controllers have to keep a mental picture of this huge region in their brains.
There are large areas of Antarctica which don’t have air traffic control, but the people in Mac Center have to keep tabs on those areas as well, since many of the planes crossing the continent fly through its area of control somewhere on the flight path.
Flights from Africa to Australia and New Zealand routinely cross Antarctica on great circle
routes; Qantas, Australia’s airline, offers sightseeing flights over Wilkes Land which sometimes
brush the edge of Mac Center’s responsibility range.
Juggling radios, telephones, and pencils, the people who work in Mac Center track everything, in their heads and on paper. There are route-checkpoint forms, radio-contact forms and weather updates which shuffle past the control desk.
“You have to do all this for each plane,” said air traffic control manager Dave Ferguson, gesturing at a set of papers including a long form with spaces for weather conditions, time, and flight direction, among other data.
It’s not self-contained. Telephone calls have to be made to Auckland when planes fly across 60 degrees south latitude, the northern boundary of Mac Center’s responsibility area. Pilots and controllers depend on reports from Mac Weather, the field camps and aircraft in the air for flying condition information.
Tapes are rolling the whole time, too. They’re used for quality control and for training, as well as providing backup in the event of an emergency, so investigators can try to piece together what happened.
Even when most of the planes are on the ground or out of Mac Center’s airspace and things are a bit slow, it is not the time to slack off. Someone might radio in any minute, needing information or help. Mac Center stands by.
Cold Hard Facts
Published in the Antarctic Sun
Does the water in the sink, toilet or tub spin down the drain in opposite directions in the Northern and Southern Hemispheres? If so, why?
You probably learned about the Coriolis Effect in high school or college science classes. This effect, caused by the rotation of the Earth, does mean that weather patterns and ocean currents spin counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.
But this effect is fairly small, and does not make much impact on such small amounts of water as those in a sink or toilet. Amounts of water along the lines of a swimming pool, however, do tend to exhibit the results of the Coriolis Effect, but only when they are drained relatively slowly and
when the water is very still prior to draining.
In reality, sinks and toilets drain in either direction in both hemispheres, depending largely on the designs of the basin and direction of flow of the water toward the drain.
What’s the coldest temperature recorded in Antarctica? The hottest? The highest wind speed?
Here are those statistics according to the website glacier.rice.edu:
Coldest: -129 F at Vostok on the polar plateau, on July 21, 1983. This is also the world’s low-temperature record.
Warmest: 59 F at Vanda Station, Scott Coast, on January 5, 1974.
Convergent katabatic winds flowing from the East Antarctic Ice Sheet make the Cape Denison-
Commonwealth Bay region of Adelie Land the windiest spot on Earth. The mean annual wind speed is 50 miles per hour and maximum measured wind velocities exceed almost 200 mph.
Does the water in the sink, toilet or tub spin down the drain in opposite directions in the Northern and Southern Hemispheres? If so, why?
You probably learned about the Coriolis Effect in high school or college science classes. This effect, caused by the rotation of the Earth, does mean that weather patterns and ocean currents spin counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.
But this effect is fairly small, and does not make much impact on such small amounts of water as those in a sink or toilet. Amounts of water along the lines of a swimming pool, however, do tend to exhibit the results of the Coriolis Effect, but only when they are drained relatively slowly and
when the water is very still prior to draining.
In reality, sinks and toilets drain in either direction in both hemispheres, depending largely on the designs of the basin and direction of flow of the water toward the drain.
What’s the coldest temperature recorded in Antarctica? The hottest? The highest wind speed?
Here are those statistics according to the website glacier.rice.edu:
Coldest: -129 F at Vostok on the polar plateau, on July 21, 1983. This is also the world’s low-temperature record.
Warmest: 59 F at Vanda Station, Scott Coast, on January 5, 1974.
Convergent katabatic winds flowing from the East Antarctic Ice Sheet make the Cape Denison-
Commonwealth Bay region of Adelie Land the windiest spot on Earth. The mean annual wind speed is 50 miles per hour and maximum measured wind velocities exceed almost 200 mph.
Y2K: Is Antarctica ready?
Published in the Antarctic Sun
A thousand years ago, some Europeans feared the world would end with the first millennium. Now, at the close of this millennium, concern has spread to all levels of societies around the world. Some people say the end is near.
Others seem less alarmed but forewarn of gas, cash and other shortages as people hoard supplies they fear will become unavailable.
In Antarctica, and in our support structure back in the U.S., there is relative calm. While it’s likely that there will be problems in some areas of the world where technology lags, the U.S. Antarctic Program has spent over a million dollars since 1997 to ensure that the remote, resource-limited stations in Antarctica will not have problems.
“Basically anything that plugs in or has a battery backup was assessed in some way,” said Beth Bradley, ASA’s Year 2000 project manager.
While many people are concerned about computers, Bradley said, they are not the primary concern with the Antarctic program.
The problem is caused by confusion in pieces of electronics which have internal clocks. If they fail to properly recognize January 1 as the year 2000 and not 1900, problems could arise. In addition, the fact that next year is a leap year compounds the issue.
With power plants, a TV and radio station, medical equipment, and science equipment, as well as the research vessels and the ubiquitous GPS units, Antarctica is a very technology-dependent place.
“We have more than most companies,” Bradley said.
It is perhaps a blessing, then, that some of the equipment in use is so old. Korean War-vintage radios, for example, have no internal clock, and thus aren’t expected to have any problems, Bradley said.
One problem area Bradley didn’t anticipate was the monitoring system on the heat traces, which warm the outdoor utility pipes at McMurdo and the Pole. If it hadn’t been fixed, the monitoring computer would have failed, potentially freezing all of the pipes at both stations.
It’s not just equipment in Antarctica which was scrutinized. Also examined were the resources of organizations with which ASA and NSF work.
The Air National Guard, Aviation Technical Services, the U.S. Coast Guard, vendors and suppliers of equipment, and subcontractors, as well as the New Zealand and Chilean governments, were all checked for potential problems.
“If anyone thinks of anyone who touches our system in any way I’ll call them and talk to them,” Bradley said.
The computer systems have also been thoroughly checked. Some equipment has been replaced, according to McMurdo computer supervisor Scott Ferguson. Some software has been upgraded or replaced as well, Ferguson said.
Protecting network operations is most important, and involves the checking of all computers that arrive at McMurdo.
“Before it gets attached to the network we test it,” Ferguson said.
E-mail and telephone connections are made via satellite link directly with stations in the United States. Ferguson does not anticipate any problems with those connections. E-mail from Christchurch takes a long route through a number of connections on the ground and in space, but Ferguson is confident those connections will remain intact.
Ferguson also noted that there are multiple methods of communication available. If telephones, for example, do not function properly, radio and e-mail connections will still be possible.
Across the board, Bradley said, equipment has been upgraded or replaced. The project has also required a careful inventory of all items in use throughout the program, which was never fully done before.
“It’s really forced us to update and take a closer look at what we have,” Bradley said.
Now the project is in its final testing phase, verifying readiness of all equipment for the new year
changeover.
“We continue to test and retest,” Bradley said.
Fifty people will work overnight on New Year’s Eve to monitor equipment and make sure everything goes smoothly.
A team in Denver will be awake early to support the Christchurch offices, Pole and McMurdo. The team will then wait for the new year to turn at Palmer Station and in Chile.
Denver’s own new year will come next, and then an hour later Port Hueneme will head into the year 2000. Only then will the Denver team be done for the day.
Bradley is anticipating some small problems, she said, but none with critical equipment. The NSF says it has a high level of confidence the transition to the new year will happen without an
interruption to science research or support.
A thousand years ago, some Europeans feared the world would end with the first millennium. Now, at the close of this millennium, concern has spread to all levels of societies around the world. Some people say the end is near.
Others seem less alarmed but forewarn of gas, cash and other shortages as people hoard supplies they fear will become unavailable.
In Antarctica, and in our support structure back in the U.S., there is relative calm. While it’s likely that there will be problems in some areas of the world where technology lags, the U.S. Antarctic Program has spent over a million dollars since 1997 to ensure that the remote, resource-limited stations in Antarctica will not have problems.
“Basically anything that plugs in or has a battery backup was assessed in some way,” said Beth Bradley, ASA’s Year 2000 project manager.
While many people are concerned about computers, Bradley said, they are not the primary concern with the Antarctic program.
The problem is caused by confusion in pieces of electronics which have internal clocks. If they fail to properly recognize January 1 as the year 2000 and not 1900, problems could arise. In addition, the fact that next year is a leap year compounds the issue.
With power plants, a TV and radio station, medical equipment, and science equipment, as well as the research vessels and the ubiquitous GPS units, Antarctica is a very technology-dependent place.
“We have more than most companies,” Bradley said.
It is perhaps a blessing, then, that some of the equipment in use is so old. Korean War-vintage radios, for example, have no internal clock, and thus aren’t expected to have any problems, Bradley said.
One problem area Bradley didn’t anticipate was the monitoring system on the heat traces, which warm the outdoor utility pipes at McMurdo and the Pole. If it hadn’t been fixed, the monitoring computer would have failed, potentially freezing all of the pipes at both stations.
It’s not just equipment in Antarctica which was scrutinized. Also examined were the resources of organizations with which ASA and NSF work.
The Air National Guard, Aviation Technical Services, the U.S. Coast Guard, vendors and suppliers of equipment, and subcontractors, as well as the New Zealand and Chilean governments, were all checked for potential problems.
“If anyone thinks of anyone who touches our system in any way I’ll call them and talk to them,” Bradley said.
The computer systems have also been thoroughly checked. Some equipment has been replaced, according to McMurdo computer supervisor Scott Ferguson. Some software has been upgraded or replaced as well, Ferguson said.
Protecting network operations is most important, and involves the checking of all computers that arrive at McMurdo.
“Before it gets attached to the network we test it,” Ferguson said.
E-mail and telephone connections are made via satellite link directly with stations in the United States. Ferguson does not anticipate any problems with those connections. E-mail from Christchurch takes a long route through a number of connections on the ground and in space, but Ferguson is confident those connections will remain intact.
Ferguson also noted that there are multiple methods of communication available. If telephones, for example, do not function properly, radio and e-mail connections will still be possible.
Across the board, Bradley said, equipment has been upgraded or replaced. The project has also required a careful inventory of all items in use throughout the program, which was never fully done before.
“It’s really forced us to update and take a closer look at what we have,” Bradley said.
Now the project is in its final testing phase, verifying readiness of all equipment for the new year
changeover.
“We continue to test and retest,” Bradley said.
Fifty people will work overnight on New Year’s Eve to monitor equipment and make sure everything goes smoothly.
A team in Denver will be awake early to support the Christchurch offices, Pole and McMurdo. The team will then wait for the new year to turn at Palmer Station and in Chile.
Denver’s own new year will come next, and then an hour later Port Hueneme will head into the year 2000. Only then will the Denver team be done for the day.
Bradley is anticipating some small problems, she said, but none with critical equipment. The NSF says it has a high level of confidence the transition to the new year will happen without an
interruption to science research or support.
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