Re: USA 320-323

From: T.S. Kelso via Seesat-l <seesat-l_at_satobs.org>
Date: Wed, 26 Jan 2022 08:50:46 -1000
USA 320/321/322/323 were just identified as 2022-002CV/CX/CY/CZ.  - TS

Dr. T.S. Kelso
CelesTrak, https://celestrak.com
E-Mail: ts.kelso_at_celestrak.com

> On 2022 Jan 26, at 05:47, Bob Christy via Seesat-l <seesat-l_at_satobs.org> wrote:
> 
> 
> When I wrote my original post it had completely slipped my mind that only forty of the forty-four Planet Labs' Flock-4X satellites have been catalogued.
> 
> Adding them in too, we get a better balance (I've changed the format slightly from the original but it gives the same message).
> 
>   4 - USA satellites
> 105 - SpaceX public manifest
> ____
> 109 - Total
> 
> 96 - catalogued items
>  5 - still attached to ION SCV
>  2? - failed to release
>  2 - Easat and Hades
>  4 - missing Flock 4X
> ____
> 109? - accounted for
> 
> Regarding Flock 4X - after launch Planet Labs mentioned via Twitter that it had been in contact with all 44 of its satellites so there is no obvious reason for the four being missed.
> 
> Robert Christy
> 
>> On 26 Jan 2022, at 13:48, Eelke Visser <eelkevisser_at_hotmail.com> wrote:
>> 
>> We are probably missing TLEs for at least Easat-2 and Hades. Daniel Estévez did RF signal measurements on Delfi-PQ, Easat-2 and Hades using the Allen Telescope Array. Because both Easat-2 and Hades where not received, due to antenna problems. See https://destevez.net/2022/01/radiometry-for-delfi-pq-easat-2-and-hades/
>> 
>> Doppler analysis on the signals showed that all three satellites match good with 51074, which was assigned to Delfi-PQ. The other TLEs of this launch did not match, and therefore we think they are missing.
>> 
>> In addition all three satellites are pocket cubes. Delfi-PQ is a 3p measuring 15x5x5cm. Both Easat-2 and Hades are 1.5p, measuring 7.5x5x5cm. Maybe they get to small to be detected?
>> 
>> Best regards,
>> 
>> Eelke.
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Received on Wed Jan 26 2022 - 12:51:56 UTC

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