What the Frack's a Fryxell?

Baby steps.  That's a method to success in many difficult projects.  This latest helicopter based skyTEM project is one of those.  We are in the proving grounds now.  We have crawled, walked and are beginning a light jog now.  Two days ago the array I wrote about in my last entry was flown around the vicinity of Mcmurdo Station in its initial calibration flights and was ready to re-position for beginning actual data collection in the Dry Valley region of Antarctica.  This is the story of the first couple days of field test flying and the success seen so far.

Initial hook up of the day to the skyTEM array

After being asked a few times what this gear was and how it works, I'll try to reexplain a but with my simple pilot brain. The array is constructed from kevlar reinforced wood.  The cross members (the white pieces on the truss) are actually only PVC.  The joints are actually only held together with kevlar cords. The rig is set to fly level around 25 knots, they can adjust it accordingly based on wind speeds, the quality of the data being processed, etc.  The wind limit is around 45 knots--that's really a structural thing as the drag will fold the array in two if exceeded.  Its rather simple and ingenious overall.  That's why the people in the tent around me have a collection of  4-5 PhD's amongst them.  As far the the operation, there is a generator in the sling that sends power to a bank of capacitors that send about a 500 amp pulse through a coil that goes around the frame's exterior.  That happens at about a millisecond cycle.  Basic physics tells you when you move an electrical field via the coil on the array through space it generates a magnetic field.  In between those cycles of the capacitor each second as that pulse field breaks down, the receivers are recording the residual eddy current fields in the ground below down to about 300-400m.  Every mineral, substance has its own unique fingerprint when these eddy currents occur. So they record this and the footprint in the ground is a few hundred meters wide so they are able to three-dimensionally map the subsurface and determine exactly what is down there, how the water is flowing under ground, under ice, etc.  

Liftoff of the array coordinated via the ground handlers

A look at the camp from the ice

Yesterday I was able to fly up to the staging area for the team at Lake Fryxell Camp located at the east end of the Taylor Valley.  The team has six members (Danish, U.S. and German) assigned to it that are camping there for around two weeks. The facilities are semi-permanent with a few structures for lab work, cooking, lounging etc.  Being a "dry" valley, there is very little snow and the camp site is on sand and pebbles along the lake shore of Lake Fryxell.  

A good scale perspective of the size of the array

The source of the lake is the melt off of the Canada Glacier. During the winter the lake is frozen solid, in the summer it begins to melt with the surrounding exposed soil radiating heat back to the ice and slowly the lake's edges melt away by summer's end.  All kinds of microbial critters live in the water and streams in these valley lakes however that is not the story here for this entry!

Beautiful ice fracture patterns in the lake ice

While observing the hoist and let-down maneuvers of the array, it was clear the planning had paid off and the right people were doing the right jobs.  The data being collected was coming back usable and faster than the project had anticipated, covering a much wider area right off the bat.  
One of the best parts of the day was being able to explore the surround area of the camp while the helicopter was flying its tracks through the upper valley. Many areas are controlled and restricted in order to preserve the untouched environment of Antarctica, however there are some established paths and the lake ice is solid providing access to some spectacular scenery.

The mummified remains of a seal that became VERY lost and off track.  There are quite a few in these valleys.

Reflections on thin ice

A broad shot of the Canada Glacier on the west side of the lake

Looking across the ice at the massive glacier

The terminus of the Canada Glacier--about a 200' wall of ice

About a 2 mile each way hike on ice for a picture. Well worth it.

Boulders that are carried along and deposited as the glacier melts

A nice airborne shot for a side perspective

Again, while photos look amazing, they hardly express the stark beauty of these valleys.  I headed back from this hike to meet the helicopter and take care of that business. 

A nice advert for North Face...

Inbound with skyTEM

Final recovery of the day

Gentle placement on terra firma is key

Shut down and debrief time

As we said earlier the flying went extremely well.  The pilots got the hang of the operation quickly and performed flawlessly.  The project has been extremely happy with the work thus far and are very excited based on the pace of operations to be able to collect a large amount of data in hopes of mapping some of the critical features around here in order to better understand the ecosystem, potentially open doors for new studies and answer some questions posed by previous projects.

 That's about all for now.  Just this last week left down here before I head home for the holidays.  I can't wait to head north.  Plenty to do this week.  Penguins, PIGs and more later this week.  Stay tuned!

View of tabular icebergs embedded in the sea ice en route home.

Greetings from Superman's Fortress of Solitude

Sorry for the radio silence from down south lately.  It's been about a week since my last entry.  This is not due to a holiday, it's really due to NOTHING happening here.  Since last Monday midday, we have not flown once. The weather has been awful.  Pretty much snow, blowing snow, ice crystals, snow pellets, freezing fog the works which all adds up to no flying around these parts.

It is also the week of Thanksgiving here, however since we typically have a six day work week and the holiday falls on a weekday--we observed it last night, Saturday night (as well as a rare two day weekend).  The irony of yesterday is that the aviators have all sat around weathered out this week and the planned day off  for the holiday was absolutely beautiful for flying.  Typical Murphy's Law!

I opted to start off the holiday right with a run and did the 5K Turkey Trot Race here. The good news was it was sunny and looked beautiful out.  Beyond that it was c-c-c-c-c-c-c-c-old and windy!

Ready...set...gooble...

Nearing the turnaround with Mount Discovery in the background

Uphill with Ob Hill in the background

The rest is downhill from here!

I think it was around 14 F with around a 30 knot breeze straight uphill on ice.  The good news was I finished, however I won't be using this time for any future race resume or qualification purposes!  Around 200 folks ran and I did finish in the middle of the pack for the under 40 men's group.  The winner ran around a 20:45 time.  I think I would have trouble doing that on pavement downhill let alone here. Next year I get to change groups to the over 40.  Look out!

The rest of the pre-gorging day was spent out on the sea ice.  The recreation folks put together the first organized tours of the pressure ridges with a mountaineer.  These monoliths are amazing.  The forces of nature are amazing and beautiful.  Its like getting to watch plate tectonics in high speed (i.e. over weeks versus 100 million years).

My immediate takeaway walking among the troughs and peaks of these frozen 25' waves was I know where the writers for Superman came up with the idea for his "Fortress of Solitude"! 

From the comic...

...to reality!

Fire and Ice! Pressure Ridges with Mount Erebus in the background

 The beauty here is amazing.  Pictures are pretty, however hardly do justice to the reality walking through this ice field.

The ice is truly blue.  Nothing touched up on these at all.

A wall 20' of lifted blue ice

A crevasse runs through this ridge

 These ridges are in constant motion.  Tidal forces act upon them daily.  As the cracks form, seawater floods into the voids, freeze and cause uplift.  This in combination with the Ross Ice Shelf flowing into this transition zone causes a mangled mass of blue and white beauty.

Erebus frames by two ridges

Flags mark the safe route.  Wander off and you may slip into a hidden crevasse 

The other beauty of these ridges is that they attract marine wildlife.  These crack do the work for the seals so they do not have to grind their way through the ice to find a breathing hole.  Weddell Seals were the mammal of choice today as we walked through the lazily snorted and rolled over, caring less that we were interrupting their sun bathing.

Life among the ridges.

Huh? Wha? Oh, back to sleep now.

A skua joining in the fun, looking for a spare scrap of fish

Zzzzzzzzz.

A look back through the ice field at Mount Terror as we walk back to Mcmurdo.

I couldn't have imagined a better Thanksgiving down here than what I did.  Lots of fun.  While I wish I was home to spend it with family and friends, this will suffice for now!  Back to the work week.  Hoping for some better weather!   Some neat projects are about to start so I can't wait to check them out and share what I can.

Talk to everyone soon!  Happy Thanksgiving!

Flight of Pegasus

So the weather finally turned a bit more traditional over the past few days with temps in the -10 below range and snow.  We received about 3-4" of fresh powder last night and it put a nice clean coat over everything. The town is normally very brown from the volcanic soil and rocks around us so its a welcome change.  

Looking out from my dorm across Winter Quarter's Bay to Scott's Hut.

Fresh powder on Observation Hill

A view across the harbor at Hut Point and Scott's Discovery Hut

So it's Sunday here, the recreation department tries to offer up different trips and such around the area to see unique sights that most folks normally don't get to see.  Today I signed up for a ride out on the ice shelf to an old plane wreck that happened in 1970.  The aircraft is a C-121 Super Connie (Constellation) that was being flown by VXE-6, the US Navy squadron that supported Operation Deep Freeze up until the late 1990's.  

Before....

The story goes like this, just before 9am on October 8, 1970 the Super Constellation "Pegasus" (BuNo 131644) of VXE-6 departed from Christchurch Airport on a ten and one half hour flight to Antarctica. The Ill-fated Aircraft ended her life in a tangled heap on the ice of the Ross Sea. Appropriately named "Pegasus"-the flying horse, this was her seventh year of Antarctic operations.  

The mission was to open up "Operation Deep Freeze 71", destination the ice runway Williams Field, McMurdo Sound, and 2,600 miles away over open frozen water. A routine squadron's flight but was to end in tragic circumstance's ten and one half hours later. Half an hour out from McMurdo, the weather had deteriorated to zero visibility with an intense storm, which had enveloped the base. Low on fuel and no alternative airfield, the aircraft commander was forced to "crash land" the aircraft. After making five approach attempts to minimums they broke out, landed and the right main landing gear was sheered off by an unseen 4' snow drift caused by the storm and winds. The aircraft veered off to the right side of the  ice runway and the "Connie" was destroyed without loss of life.

...and after.

The aircraft remained in the vicinity of Williams Field for the season, however for obvious morale reasons, seeing one of your squadron's wrecked aircraft daily with its wing ripped off in heap was not good for the troops.  The commander decided at the time to haul the wreck out of plain sight about 10 miles away on the ice shelf where the current permanent ice runway is located, now named for its historic neighbor, Pegasus.

Snapshot view of the crash site and surrounding ice shelf

 So its now partially buried in drifting snow and ice about 2 miles from the current airfield location.  We were the first tour of the season, typically by season end, it's dug out enough by curious folks that most of the aircraft is exposed.  It's a neat opportunity to see and spend an afternoon.  How many times can you say you crawled around a plane wreck on an ice shelf? Hopefully, this is my only time--a planned outing!  

A look back at what's left of the empenage

Crawling on top

A look down the fuselage

Kind of cool, right? It's always neat discovering new things to see around here.  Back to my work week now.  Weather permitting, I'm off to go fly tomorrow and then I can't wait for Tuesday--off to South Pole Station!  That will be great.