Showing posts with label DP0GVN. Show all posts
Showing posts with label DP0GVN. Show all posts

Wednesday, February 16, 2022

Amateur TV signals from the German Antarctic Research Station DP0GVN


After hearing the German Antarctic research station, DP0GVN on 28 MHz WSPR yesterday, it reminded me of a recent story I saw about how that station is also operational on ATV (Amateur Television) on the QO-100 Geostationary satellite.

The QO-100 geostationary satellite is located over central Africa and it is allowing radio amateurs the opportunity to experiment on the microwave bands. The uplink to the satellite is just above 2.4 GHz while the downlink is just below 10.5 GHz.


The footprint of the satellite with 5 degree and 10 degree elevations is shown above. For the DP0GVN station in Antarctica, the elevation of the satellite is about 7 degrees above the horizon.


AMSAT-DL recently paid for a new antenna and radome to be installed at the station as shown above. This happened at the start of January 2022.


This is the new radome in place to protect the antenna from the harsh Antarctic weather.

This video clip from Vale, IZ5ILX in Italy dated the 31st of January 2022  shows the ATV signal from DP0GVN via the QO-100 satellite.

While I'm not that interested in Amateur TV or satellite operations, I did find this story interesting because it shows how a geostationary satellite like QO-100 is opening up a lot of possibilities for experimentation on the microwaves bands and with Amateur TV.

For someone outside the footprint like in North America, these experiments are impossible unless they live near others active on those bands or modes.

There has been a lot of talk of late about how to get more people interested in Amateur Radio. I'd suggest that experiments like this are going to appeal a lot more to a younger generation than say making SSB contacts on the HF bands which is rather dated at this stage.

Wednesday, February 2, 2022

Antarctica heard on 28 MHz - 1st Feb 2022


Tuesday 1st February 2022: While conditions on 28 MHz weren't as good as the 31st of January, the 10m band still opened to Australia. I was listening on WSPR all day and the most interesting signal for me however was the German Antarctic research station DP0GVN.

These are the WSPR decodes from Australia & Antarctica...

 Local   (y-m-d) TX txGrid RX rxGrid MHz W                             SNR drift km
2022-02-01 10:16 VK3KCX/1 QF22qd EI7GL IO51tu 28.126019 50 -24 0 17449
2022-02-01 10:08 VK3KCX/1 QF22qd EI7GL IO51tu 28.126016 50 -23 0 17449
2022-02-01 09:54 VK3KCX/1 QF22qd EI7GL IO51tu 28.126011 50 -23 1 174492
022-02-01 09:40 VK3KCX/1 QF22qd EI7GL IO51tu 28.126 50 -25 1 17449
2022-02-01 09:42 VK3DEK QF12jq EI7GL IO51tu 28.126094 5 -20 0 17247
2022-02-01 09:36 VK3DEK QF12jq EI7GL IO51tu 28.126089 5 -24 0 17247
2022-02-01 12:48 DP0GVN IB59ui EI7GL IO51tu 28.126042 5 -27 0 13621
2022-02-01 12:18 DP0GVN IB59ui EI7GL IO51tu 28.126038 5 -29 1 13621
2022-02-01 11:48 DP0GVN IB59ui EI7GL IO51tu 28.126039 5 -20 0 13621
2022-02-01 10:18 DP0GVN IB59ui EI7GL IO51tu 28.126022 5 -29 0 13621
2022-02-01 09:48 DP0GVN IB59ui EI7GL IO51tu 28.126007 5 -23 1 13621

If you examine the signal strengths then you'll notice that they are all down down in the -20dB to -29dB region i.e. they're buried in the noise and well below what I could hear by ear.

Even if the signal is really weak, there is still a bit a of 'wow' moment when Antarctica appears on the screen on 10m.


Monday, October 11, 2021

Antarctica heard on 28 MHz - Sun 10th Oct 2021


Sunday 10th October 2021: I got a bit tired of listening for FT8 signals on the 28 MHz band so I decided to go back to WSPR instead. As I had expected, the amount of activity on this digital beacon mode was drastically lower.

I had the radio on from about noon on and as you can see from the map above, it's a bit sparse. I know that if this had been FT8, there would have been lots of stations heard.

The BIG surprise however was the German research station DP0GVN in Antarctica! Wow! 


It's always interesting to see Antarctica coming through but it's really nice on 28 MHz. According to their WSPR page, they run 5-watts on WSPR. 

The signal however was very weak here. According to the log, I had one single decode at -26dB which is well below what is audible by the human ear.

Looking at the map, there is other evidence of F2 propagation as well. During the Summer months, I used to hear VE1VDM in Nova Scotia via multi-hop Sporadic-E. On the 10th of October, it was very likely due to a single F2 hop as the solar conditions improve.

The solar flux on the day was at 85.

Addendum...

Related to 10m info  on https://ei7gl.blogspot.com/ I would like to add, that yesterday, during Makrothen RTTY contest, there was interesting and excellent 10m opening towards USA. This is extract from S53M log.

QSO: 28085 RY 2021-10-10 1502 S53M          599 JN86 K3MM          599 FM19
QSO: 28086 RY 2021-10-10 1503 S53M          599 JN86 K1MK          599 FN32
QSO: 28086 RY 2021-10-10 1505 S53M          599 JN86 NA3M          599 FM19
QSO: 28086 RY 2021-10-10 1505 S53M          599 JN86 K2YG          599 FN20
QSO: 28086 RY 2021-10-10 1506 S53M          599 JN86 N1MGO         599 FN42
QSO: 28086 RY 2021-10-10 1507 S53M          599 JN86 KB3AAY        599 FM19
QSO: 28086 RY 2021-10-10 1508 S53M          599 JN86 KC2WUF        599 FN20
QSO: 28086 RY 2021-10-10 1509 S53M          599 JN86 ND2K          599 FN20
QSO: 28086 RY 2021-10-10 1510 S53M          599 JN86 W9ILY         599 EN51
QSO: 28086 RY 2021-10-10 1515 S53M          599 JN86 WQ5L          599 EM50
QSO: 28086 RY 2021-10-10 1515 S53M          599 JN86 KG4W          599 FM17
QSO: 28086 RY 2021-10-10 1516 S53M          599 JN86 WA3AFS        599 FN32
QSO: 28086 RY 2021-10-10 1516 S53M          599 JN86 KO7SS         599 DM42
QSO: 28086 RY 2021-10-10 1517 S53M          599 JN86 K2AL          599 FN20
QSO: 28086 RY 2021-10-10 1519 S53M          599 JN86 VA3LR         599 EN93
QSO: 28086 RY 2021-10-10 1520 S53M          599 JN86 WA4EEZ        599 EL87
QSO: 28086 RY 2021-10-10 1522 S53M          599 JN86 W9FFA         599 EM69
QSO: 28086 RY 2021-10-10 1524 S53M          599 JN86 WA1GOS        599 FN42

Kind regards
Miha, S51FB