Re: LF: Antarctica on 630m WSPR

[Rik Strobbe <rik.strobbe@kuleuven.be>]

All,

some interesting comments by W5EST, on the possibility of reaching DP0GVN on 630 m, have been published on KB5NJD's daily reports page.

Part 1: http://njdtechnologies.net/030818/ and scroll down to "WHERE AND WHEN? 630M SIGNAL PATHS TO DP0GVN IN ANTARCTICA"

Part 2: http://njdtechnologies.net/031018/ and again scroll down to “PART 2: WHERE AND WHEN? 630M SIGNAL PATHS TO DP0GVN IN ANTARCTICA“​.

Thanks to Roger, VK4YB for pointing me to this.

73, Rik  ON7YD - OR7T

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Van: owner-rsgb_lf_group@blacksheep.org <owner-rsgb_lf_group@blacksheep.org> namens DK7FC <selberdenken@posteo.de>
Verzonden: vrijdag 9 maart 2018 14:53
Aan: rsgb_lf_group@blacksheep.org
Onderwerp: Re: LF: Antarctica on 630m WSPR

 

MF,

Well, several strong stations were TXing WSPR-2 last night on 630m.
The condx seemed to be quite good. FR5DH has got 35 decode from 3 stations, best reports were:

Timestamp	Call	MHz	SNR	Drift	Grid	Pwr	Reporter	RGrid	km	az
2018-03-08 23:22	G3KEV	0.475628	-22	0	IO94sh	5	FR5DH	LG78pw	9915	130
2018-03-08 23:36	DK7FC	0.475682	-23	0	JN49ik	1	FR5DH	LG78pw	9087	137
2018-03-08 22:20	EA5DOM	0.475609	-24	0	IM98xn	1	FR5DH	LG78pw	8783	129

The path to FR5DH is not directly on the path to DP0GVN but the landpath to cross for these 3 stations is similar or even more. The rest of the distance to make is just across sea water.
I don't know, maybe it is much more difficult to get a decode on 630m in Antarctica because it is so close to the pole, geomag stuff and so on. Or, it could be an issue of RX sensitivity at that frequency.
The audio file to analyse would help.

Yesterday we (Rik) invited VK4YB to participate in the experiment but he just started to TX again at 08:24 UTC.

Any more ideas someone?

For tonite i'll be back on VLF, continuing to try to pass the 5 char message over to W1VD and K3SIW...

73, Stefan