Re: Off Topic: Request for UNID identification

From: C. Bassa via Seesat-l <>
Date: Thu, 6 Dec 2018 13:20:25 +0100
Hi Andy,

On Thu, Dec 6, 2018 at 1:07 PM AjK <> wrote:
> If this is the case this is the first satellite detection I could confirm which seems strange since I have previously tried, and failed, with the ISS

My guess would be that this is because you focus on a narrow band
around the GRAVES frequency. This means that satellites will only be
visible at that frequency if the velocity between the transmitter and
the satellite as well as the velocity between the satellite and your
receiver, is very close zero. This would normally occur near
culmination (closest approach). For the ISS orbit at 51.6 deg
inclination, this usually occurs outside of the GRAVES radar beam.
Since Tiangong-2 is at lower inclination, you are more likely to see
that around 143.050MHz. My suggestion would be to look at a larger
bandwidth, or focus on frequencies about 50kHz above or below the
GRAVES frequency.

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Received on Thu Dec 06 2018 - 06:21:05 UTC

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