Tuesday, 21 January 2014

Tuesday 21st January 2014

Today I was slushy hopefully for the last time. I worked flat out all day and during my break I spent my time packing for tomorrows RTA deadline. I also managed to put on a load of washing and after dinner we had a meeting for a planned three day field trip 80kms out to Mt Twintops to do some survey work for a possible future snow runway.

On a sad note, out of the 4000 nesting Adélie penguins on Bechervaise Island this year, only 150 chicks have survived to date out of the 8000 eggs laid due to the heat and the sea ice remaining this late in the year as far out as 100 miles. This is a very sad event but it occurs on average around every twelve years. The skua's must be having a field day out there.

Four of the guys took the floating rescue craft out to Bechervaise Island to see if it would be possible to rescue the two biologists over there if we had to. They had fun falling through the ice on many occasions but proved it could be done easily if need be. They also took them out some fresh food and treats and the girls were amazed and thrilled to see the guy's turn up and very appreciative.



Monday, 20 January 2014

Monday 20th January 2014

I woke up today very sore and tired. The spare ARPANSA detector we had been using crashed in the heat again so we had to configure the main unit to go on line. I spent most of the morning fixing the faulty switch mode power supply in the Blizz FM transmitter. As I expected there were faulty electrolytic capacitors among the tuned circuits preventing the power supply from oscillating and when I replaced the forth one it came back to life.

I heard Geoff on the radio say that a large chunk of ice just broke off west bay ice cliffs crashing into the water through the sea ice making a huge noise and a large splash with huge waves. I was on my way up that way to install the Blizz FM transmitter, so I thought I'd check it out while I'm up there. On the way I dropped into the ANARESAT building to reset the antenna tracking control unit where I bumped into Geoff on his way up to check out the ice cliffs. I installed the Blizz FM transmitter and then went over to where Geoff was. 

The ice had smashed through the sea ice and there was debris everywhere. I took a few photos to compare the before and after and then I went down to the deiso’s workshop to get a large spanner to take back up the hill to tighten the bolts on the transceivers mast base plate. I had to make this trip several times before I got the right size spanner and by the time had I got it done I was knackered, so I headed down to the transmitter building to see what conditions were like. Propagation was fantastic and I worked a lot of Australian stations before I took a break for dinner. Later I came back and worked a hundred or so stations from all around the world including America, Europe, PNG and my mate in Green Land once again.

When we first arrived
After the first ice fall in May
After the first ice fall in May
After the second ice fall today

Sunday, 19 January 2014

Sunday 19th January 2014

Today John, Richard, Peter.C and I left station at 10:30 to attempt to climb Fang Peak in the David Range. We arrived at Fang hut at 12:00 after a bumpy ride through the sastrugi. Almost all the melt streams were frozen and all the slushy areas and lakes from last weekend were totally frozen. This place can change so fast this time of year. We did manage to find one stream still flowing to fill our water bottles with the purest water on earth.

Strait away we got stuck into the climb starting out with a large scree slope which was quite good walking as it was locked in and didn't slide like it usually does when you walk in scree. Once high up on the saddle the climb started in earnest along the rugged ridge line. Several places were very exposed where we were jumping from boulder to boulder with very steep cliffs either side. Eventually the climb got so steep and exposed we had to break out the ropes which we pretty well had to use for the rest of the climb. I came across a snow pigeons nest in the rocks and they let me know I wasn't welcome.

John and Richard were great setting up all the anchors and giving me a lot of encouragement as I tackled the near vertical rock face. It was definitely the hardest and scariest climb I have tackled to date. Even though I had the security of being tethered, hanging by the tips of your fingers a thousand feet up with a vertical drop makes you really focus on the task at hand rather than looking around admiring the view. I was still feeling a little off colour with the absis on my tooth and the medication I was taking and I really found it a strenuous climb straining and reaching for tiny hand and foot holds. Mountain climbing is psychological just as much as it is physical. It’s almost constant terror and massive adrenalin surges where you really challenge yourself.

 Finally we made it to Hillary’s step, a nice large ledge only four meters from the summit where I could rest and relax while John free climbed to install the last pitons to belay us up. It was lovely relaxing in the warm sun taking in the view out of the wind. Finally the moment came I was dreading, climbing the final four meters to the summit up a small crack that was an overhang with a thousand foot vertical drop below. There were virtually no hand or foot holds and I was shitting myself. This part of the climb was in the shade and exposed to the wind and my hands were freezing and on the verge of going off so I had to move quickly or I would be in deep shit. With sore bleeding fingers I managed to lift my feet as high as I could and reach out as far as I could to find the tiniest cracks in the rock to heave myself to the summit and finally I was there. 

The view of course was incredible and after the obligatory hi fives and photos we sat back to take it all in while John filled out the visitors book, tiny bits of paper inside a very old curry powder tin hidden in the rocks. I was dreading the climb back down and I was hoping we were going to abseil back down and get it over and done with as quick as we could, but John announced it would be best to climb back down. Richard announced that there appeared to be an easier way down on the northern side and he scurried off like a gecko over the side and out of view. He yelled out from Hillary’s step that it was okay that way and John said to me off you go. 

I was shitting myself not knowing what to expect as I lowered myself over the edge trying to find footholds without being able to see my feet. I was out of sight of the others very exposed on a sheer rock face with the Hag a thousand feet directly below trying to stay calm and focus on the task. Slowly I made my way back down until I reached a small ledge where I could inch my way around back to where Richard was. Time to start breathing again while I waited for Peter and John to get down. 

Once John had anchored himself, Richard went over the side for the first of several long belays. Next to go was me. To my delight I found it much easier going back down. It was still extremely hard work and scary but I felt more confident as I knew the path and with each step I knew I was getting closer to the saddle. By the time I got to our packs at the end of the last belay line I was knackered and my hips and knees were quite sore. From here it was a leap frog from boulder to boulder with only five hundred foot vertical cliffs to mess with your brain on each side and eventually we made it along the spine to the saddle where we started the steep descent back down the scree slope. 

Finally we reached the Hag and I was exhausted and mentally drained. We didn't hang about too long before I started the long drive back to the station. The trip back was rather uneventful, the melt streams and lakes were still frozen making easy going over the rough terrain.  At one point I stopped to take a photo of the track. It looked like a muddy 4WD track through the Kimberley, but frozen and clear. I stepped out of the Hag and the surface was like glass and I went A over T and landed quite heavy laughing my eyeballs out. (ROFL) I think I broke every bone in my body and got concussion when my head hit the ice, but looking back up at the Hag at the three heads poking out to see if I was alright only made me laugh harder. 

We stopped near a large lake east of Gwamm that had me puzzled last Sunday when I drove past with Luc. Last Sunday the large lake had many icebergs that appeared to be floating in it. There were too many slots in the area to take a closer look so we just continued on, puzzled. This time the lake had drained and there were huge ice blocks scattered everywhere. After a good long reconnaissance through the telephoto lens I speculated there must be a submerged rocky knoll under the ice under extreme pressure and the lake water might have flowed down through cracks and lubricated the underside of the ice causing a slip and a massive release of pressure as what happens in an earthquake, blasting out huge blocks of ice in all directions. There was a huge amount of devastation and it must have been awesome to see it happen. I have always treated the ice cliffs with caution, but this just goes to show the immense forces at play in the ice sheet can have destructive forces where you may least expect it. 

Back at the station around seven o'clock, after we had unloaded and refuelled the Hag, I did the ARPANSA filter change, got myself some tucker and then wound down with a few beers with Geoff.




Snow pigeons nest




On the summit at last


Mt Parsons
Mt Elliot
Southern Masson
Fang hut and the Hag 1000' below
Welch Island and no water for 100 miles


Coming back down the scree slope

Filling the water bottles with the cleanest water on earth

Saturday, 18 January 2014

Saturday 18th January 2014

At around 7am the power went off for about forty minutes, then we got a fire alarm and I couldn't see to get dressed, it was a false alarm but by now my sleep-in was ruined. After breakfast I reset the antenna tracking system on the ANARESAT antenna and then went up to the transceivers hut to investigate why our local radio station Blizz FM was not working after the power outage and I discovered its power supply was no longer working, so I removed the transmitter to take back to the workshop for further investigation.

I spent a few hours on the radio chatting to people back in Australia and after dinner Luc and I talked shit out on East arm while watching the sunset and moonrise at the same time, it was a really spectacular view. When the sun went down a breeze came up and instantly I started to become hypothermic during the long walk back to the red shed wearing only a T-shirt.


View of Mt Henderson from East arm

Friday, 17 January 2014

Friday 17th January 2014

This morning the electricians complained of long latency with their electronic control and monitoring of the MPH. I fixed problem by rebooting the switch in the MPH. For some reason the VoIP phone was causing runt packets. I did ARPANSA and put on a load of washing and then later hung it out. After lunch I performed this week’s magnetic observations and there was very little magnetic activity and I got some really accurate results. Following this I tried to setup a new web camera for the Operations building but had problems with the software and eventually ran out of time.

The sun has been above the horizon constantly since 30th November of last year but on the night of 13th and 14th January we witnessed the sun dipped below the horizon again. The night started at 12:49 and the sun came back up at 01:06. So, we had a night lasting 17 minutes.

From now on the nights will get longer and longer and in a week's time the nights will get longer by an average of 12 minutes per day. By the end of January the night time will last for nearly five hours!


Thursday, 16 January 2014

Thursday 16th January 2014

Well today wasn't very exciting. After doing ARPANSA I spent the whole day cleaning up and removing old files from the file server and several PC’s I have been using throughout the year. I also managed to find my MixW log file that is a hidden compatibility file whatever that is? At least now I know it is getting backed up and is on my laptop ready to take home with me. After work I enjoyed a couple of coldies out on east arm away from the MPH in total silence watching the ice move back and forth from the gentle swell rolling through.

On these still clam days it’s possible to watch the tide rise and fall before your eyes, something that I have never witnessed before. The only thing to break the silence is the odd penguin calling out and the sea ice crushing together now and then. The nights are getting colder now and the open water is covered in grease ice every morning so if the sea ice doesn't blow out soon the sea is going to refreeze and lock all the ice back in. Normally the sea ice would have broken out by this time of year.


Grease ice forming over night every day now

Power generation at Mawson station

At Mawson, the main power house (MPH) is powered by 4 Caterpillar 3306, turbo-charged generator sets, each of 125 kW capacity. All are fitted with Stamford alternators. Depending on the energy requirements, up to 3 of these generators run at any one time.

The emergency power house (EPH) at Mawson is equipped with 1 Caterpillar V12 turbo-charged generator with a capacity of 384 kW.

The Mawson power supply is also boosted with two wind powered turbines which can supply up to 95% of the station's power requirements in times of high winds. These two turbines reduce the amount of diesel fuel required by over two thirds, from 600,000 litres a year to less than 200,000 litres. The wind turbines also save 1,500 tonnes of CO2 a year from being released into the environment.

These wind powered turbines are made in Germany by Enercon and some of their specifications are;

Rated power: 330 kW
Rotor diameter: 33.4 m
Hub height: 50 m
Turbine concept: Gearless, variable speed, single blade pitch adjustment
Type: Upwind rotor with active pitch control
Rotation direction: Clockwise
No of blades: 3
Sweep area: 876 m²
Blade material: GRP (epoxy resin)
Rotational speed: Variable, 18 - 45 rpm
Main bearing: Tapered roller bearing pair
Generator: ENERCON direct-drive annular generator

Power is distributed around the station in a ring feed (for redundancy) on raised cable trays. Should there be a fire or a cable damaged power can be quickly distributed from another direction.

MPH
MPH control room
Engine room
EPH
EPH engine room
RMU
Enercon 330 kW wind powered turbine