衛星 Nodes-2 の 2.4GHz信号を受信したという記事を以前、JA0CAW局が報告して
いました。自局もその後何度も Nodes-2 の 2.4GHz受信を試みていますが、その
信号を捕らえることができません。今朝、それに関連して、Michael Williams氏
から、管制局とやり取りした時の私信が届きましたので、ここに紹介します。
Rceived Nodes-2 2.4GHz on 23:27UTC over Japan by JA0CAW
http://blog.goo.ne.jp/ja0caw-je0mzi/d/20161113
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Subject: RE: Nodes-1/2 2.4 GHz signal.
From: Hanson John E. (ARC-B)[Millennium Engineering & Integration Co.]
To: MICHAEL WILLIAMS
Date: 11/23/2016 1:34 AM
Michael, Thanks for the interest in Nodes.
The 2.4 GHz signal is a spread spectrum signal that is only emitted when
the spacecraft passes over the ground station at Santa Clara University,
so unless you are near that site, you will likely not be able to monitor
the signal. You can monitor the UHF beacon regularly and the UHF crosslink
signal if you are lucky.
Regards, John
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Subject: Nodes-1/2 2.4 GHz signal.
From: MICHAEL WILLIAMS
To: Hanson, John E. (ARC-B)[Millennium Engineering & Integration Co.]
Sent: Tuesday, November 22, 2016 5:16 PM
Sir, I would like to attempt and listen for the Nodes 2.4 GHz signal.
Could you please give me some information. Does it transmit continually
or is it turned on only over the control station? I am in Indiana.
Is it intermittent, 30 sec., 1 min. intervals etc? From what information
I could find, its frequency is 2401.2 - 2431.2 MHz with 11500 FSK.
I am using a Software defined radio to look at that spectrum.
What does the NODES signal look like?
Thank you, Mike Williams, K9QHO, Elwood, IN