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LF: Re: WSPR SNR

from [James Moritz] [Permanent Link][Original]
To: <[email protected]>
Subject: LF: Re: WSPR SNR
From: "James Moritz" <[email protected]>
Date: Sun, 18 Jan 2009 20:44:52 -0000
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Dear LF Group,
Still watching G4WGT's WSPR signal here - it is interesting to see how it copes well with the QSB. Compare the last few decodes: 

2006 -30  1.2   0.503599  0 G4WGT IO83 37
2014 -22  1.1   0.503599  0 G4WGT IO83 37
2018 -22  1.0   0.503599  0 G4WGT IO83 37
2024 -27  1.3   0.503599  0 G4WGT IO83 37
2030 -24  1.2   0.503599  0 G4WGT IO83 37
with the WSPR spectrogram attached (it looks similar in Spectrum Lab), and you can see that although in a significant fraction of each transmission period the signal has faded to invisibility, decoding has still been successful.
It is also interesting to see in the WSPRnet database that GM4SLV is reporting SNR that is consistently several dB better than here at M0BMU, although he is nearly 3 times as far from G4WGT. 

Cheers, Jim Moritz
73 de M0BMU

Attachment: G4WGT_wspr6.jpg
Description: JPEG image

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