Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

LF: VO1NA opds-32

To: <[email protected]>
Subject: LF: VO1NA opds-32
From: "Markus Vester" <[email protected]>
Date: Sat, 7 Nov 2015 10:51:29 +0100
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1446889903; bh=jF2faSoFMBI4TXYO1ZYTDQk6RSpDHljRrJtbjPiglWQ=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=DQBnYCeUKhnorI0XSYjatS9Z9NVLdmRtoT6IOsq80oT6k/254KpgwPoYB7Pu1G8lh BQiERWpkV7uxbbdJGbWjRun52ZZioEMsBScVkCvzG+DTbSG5PgR2yc/0B4UZUaLV0d uaeeJ4x+VHSaBJXvLAwk5kq6HHUHbFOUKnt2DnYI=
Importance: Normal
References: <CFDF71B9E3C84251919B15689C927484@eplwin764i3> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Hi Joe, LF,
 
during the last couple of nights, opds detected all of your transmissions between about 22  and 7:30 UT.
 
Attached is a zoomed 40 mHz section from my opds-32 spectrogram, showing your central coherent carrier which contains half of the transmitted average power. It seems to be about 0.5 mHz below 137477 Hz (possibly due to a calibration error in my receiver). The 2.7 mHz spaced sidelines during the early part (bottom) were caused by 6-minute-periodic interruptions from my own MF WSPR transmissions. However the little curls near the carrier can presumably be attributed to Doppler-shifted multipath components. The carrier was still weakly visible for another hour after the last detection.
 
Comparing the looks of the carrier to earlier IZ7SLZ transmissions, the stability of the signal and the path seems quite sufficient for half-hour EbNaut PSK transmissions. Unfortunately I missed the opportunity to save the raw data and analyze phase evolution using the EbNaut decoder itself - will try that next time. 
 
All the best,
Markus (DF6NM)
 
 

Sent: Saturday, November 07, 2015 12:03 AM
Subject: Re: LF: last night opera opds detection in km07ks

LF Group,


I am grateful to Joe DF2JP for his captures QRSS and Opera
Dionysious SV8RV for his OP decodes to Domenico IZ7SLZ
for his OPDS decodes, and thanks to DF6NM for opds!

I do not know if my DOCXO is stable enough for EbNaut.
It was set a couple of years ago and has not drifted more than
1 Hz since then.  It seems the phase decoherence has stopped
haunting me.

I am hoping to replace the halyard for the other 100m wire soon.

OP32 again tonight as send this email.

73
Joe

Attachment: opds32_vo1na_zoom_151107_0906.png
Description: PNG image

<Prev in Thread] Current Thread [Next in Thread>