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Antarctic Activation to commemorate ANZAC

This very special activation of the ANZAC callsign is expected to happen over this weekend. There will be a level of uncertainty in being able to operate mostly due to the Antarctic weather. Currently there is a blizzard occurring with 100 knot winds. I will keep sending information via email and WIA web site www.wia.org.au

Fred Swainston VK3DAC WIA ANZAC Event Co-ordinator

The activation of VI0ANZAC on Casey Station in the Australian Antarctic Territory is due to start operation, as part of the Wireless Institute of Australia ANZAC 100 program.

Doug VK0DMV is working at Casey Station and has great pleasure in activating the VI0ANZAC callsign. His role keeps him extremely busy and can only operate when his duties allow. This will mean that some published operation time may not occur due to operational requirements and the weather conditions.

VI0ANZAC will use the commercial Qmac HF90 transceiver with an output power of 50 watts into a dipole antenna.

Doug thanks both the WIA and the Australian Antarctic Division for this opportunity in this the 100th Anniversary year of the Gallipoli campaign in WWI. QSL in strictly eQSL.

Fred VK3DAC, the ANZAC 100 coordinator will be on air as a control station. Potential operating dates are the 8th and 9th of August, start time at 0000UTC which is 10am AEST,8am at Casey Station and operate for 2 hours, and then stop.

Doug is and experienced radio man but has had little experience in amateur radio, Patience is required

To set up a contact you can email trainsafe@silvertrain.com.au

Proposed schedule for Saturday the 9th August and Sunday 10th August the UTC times proposed are: are:

0000 to 0200

0400 to 0600

0900 to 1100

The frequencies are:

0000 to 0030 on 7.095MHz

0030 to 0130 on 14.250MHz

0130 to 0200 on 21.250MHz

0400 to 0430 on 7.095MHz

0430 to 0530 on 14.250MHz

0530 to 0600 on 21.250MHz

0900 to 1030 on 14.250MHz

1030 to 1100 on 3.585MHz

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… I need to go back to school…

 

The Thunderbolt Trimble GPSDO I ordered finally arrived, after all you can’t possibly have _too_ many time sources.   Of course the first thing I did was set it up, run the position survey and plug it into my HP 5335 Universal Counter which was recently calibrated to a rubidium standard.

Lo and behold after warming up the counter still read:

9.999 999 71 +6   (i.e. 9.999 999 71 * 10E6)

Ok, the trimble will take a while to run the Allan Deviation, I’ll leave it go and come back later.   24 hours later I read:

9.999 999 71 +6

No change, so what’s going on here as I expected exactly (or close to) 10 MHz and I’m reasonably sure the HP Counter is accurate.

I switch to Period mode:

100.000 002 9 -9 (i.e. 100.0000029 *10E-9

Which matches the observed frequency, at 10MHz the period should be exactly 100 nanoseconds…  what’s going on here, lots of fiddling and trying to work out why it wasn’t right, is my counter wrong or there a problem with the Trimble…

What I didn’t facter in is that the ‘002 9′ is in fact ‘2.9 Femtoseconds’ or 2.9*10E-15, the rated accuracy of the GPSDO is 1.16*10E-12.

Aka… timing resolution achieved, and I can forgive the 2.9 femto seconds in either the counter or gpsdo.  In other words, its reasonably accurate as is my counter, and that’s probably as accurate as I’m likely to have… at least until I get my hands on a cesium standard 😉

All I need to do is sit, wait, confirm the results once the GPS has reached its rated resolution, and then use that as my frequency reference.  This will probably take a week or so, but for now it’s not bad.

http://www.vk2vjb.net/2015/08/06/go-back-to-school-nugget/

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