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Re: LF: Antarctica on 630m WSPR

from [Rik Strobbe] [Permanent Link][Original]
To: "[email protected]" <[email protected]>
Subject: Re: LF: Antarctica on 630m WSPR
From: Rik Strobbe <[email protected]>
Date: Mon, 12 Mar 2018 07:28:28 +0000
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Thread-topic: LF: Antarctica on 630m WSPR

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


Van: [email protected] <[email protected]> namens DK7FC <[email protected]>
Verzonden: vrijdag 9 maart 2018 14:53
Aan: [email protected]
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
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