DGPS Non-Logs May 17 2024

[skeezix]

I haven't posted in a while as there have been no decodes. While propagation has been tough and thunderstorm season is now starting, even during the sufficient days, there have been no decodes.

I've been decoding every day and nothing comes up. Not even from Panama... but they're off the side of the loop (-30 db down), so I don't blame them too much. I think the Canadians have finally shut off their transmitters, or decreased power.

[ChrisSmolinski]

Interesting - sometimes null results are still useful results.

[ChrisSmolinski]

p.s. Last night I checked some KiwiSDRs around NL, and this morning one in Vancouver very close to Richmond BC, no sign of any DGPS transmissions.

[skeezix]

I think they're all gone now.

I had ADGPS set to show 2+ decodes. I set it to 1 and it found three:
Count    ID   ref1 ref2 kHz   Baud City                           Country              Lat      Lon      km     Deg
1        673  751  752  303.0 200  Pyeongchang                    South Korea          37.333   128.483  9,940  328
1        204  463  463  310.0 100  Canivete                       Brazil               0.516    -50.424  6,499  127
1        971  903  904  307.0 200  Gatun                          Panama               9.261    -79.937  4,181  158


South Korea is impossible.
Brazil, is possible, but would be a first. I consider it undetermined
Gatun definitely comes in here, so this could be a good decode.


Haven't seen any Canadian stations since the last post with them. Probably won't be doing this much more. I'm going to see if I can move the loop antenna from E-W to N-S (i.e. to another side of the garage). It will be a bit lower to the ground, but it'll have to deal with it.

[ChrisSmolinski]

I think they're all gone now.

I had ADGPS set to show 2+ decodes. I set it to 1 and it found three:
Count    ID   ref1 ref2 kHz   Baud City                           Country              Lat      Lon      km     Deg
1        673  751  752  303.0 200  Pyeongchang                    South Korea          37.333   128.483  9,940  328
1        204  463  463  310.0 100  Canivete                       Brazil               0.516    -50.424  6,499  127
1        971  903  904  307.0 200  Gatun                          Panama               9.261    -79.937  4,181  158


South Korea is impossible.
Brazil, is possible, but would be a first. I consider it undetermined
Gatun definitely comes in here, so this could be a good decode.


Haven't seen any Canadian stations since the last post with them. Probably won't be doing this much more. I'm going to see if I can move the loop antenna from E-W to N-S (i.e. to another side of the garage). It will be a bit lower to the ground, but it'll have to deal with it.

I checked my posts here, looks like I received Canivete on at least three nights back in the fall of 2020, twice with several dozen decodes and once with almost 300. So it's certainly possible, although yeah, I'm always dubious of single decodes. More likely to be spurious like South Korea.

Interesting how long it took for the Canadians to finally go SK. Maybe they had to wait for both copies of the official paperwork to be approved, both the English and French versions? 

Since we're still moving into solar max, I don't think this band will be useful for DX catches from any remaining foreign DGPS stations for several years, and by then they may all be gone anyway.

DGPS was fun while it lasted! My main lament is that I didn't get into it and write Amalgamated DGPS a few years earlier, before the US started decommissioning the interior land-locked (non USCG) stations.

[skeezix]

I still would like to see what's south of us. With 30dB null in my loop, its not been good for down there. Although many times, Gatun and Miraflores came in quite strong.

It did take Canada a long time, I was a bit surprised. Considering they'd been planning for years with a date to turn them off, but apparently things moved slow. Unless there was some renegade up there reading our posts and didn't turn them off, then someone in mgmt found out they weren't off yet. 

This DGPS project was great fun. I still wish they were all going. I especially liked the station not far from here at Alma, WI that would come in 24x7. When it didn't, then I knew I had a problem with my station. 

All good things must come to an end. Hopefully something else will come up.

[ChrisSmolinski]

Analyzing the nightly DGPS logs and noticing how DX stations would often come in from one very specific location at a time, which usually moved around, taught me a lot about how propagation really works, vs how propagation officially works.

[skeezix]

Yeah, I fully agree.