Re: MUOS 4 has moved

From: Marco Langbroek via Seesat-l <>
Date: Thu, 3 Mar 2016 10:48:13 +0100
Op 3-3-2016 om 7:19 schreef Greg Roberts via Seesat-l:
>  If Marco is correct with his date as to when the drift had stopped-
> towards end of Feb-
> then the satellite is probably at 75 degrees east. I will check next time I
> observe as I have
> no reason to doubt Marco's deductions.
> Cheers
> Greg

Hi Greg, others,

The value of 75 E is the intended operational position for MUOS 4 listed in a 
document here:

The MUOS 1 to 3 operational positions in that document agree well with the 
observed operational positions for these satellites, so I expect 75 E to be 
correct too.

Using the drift rate of -3.06105 deg/day deduced from two early and mid February 
elsets for MUOS 4 received off-line, suggests that 75 E was reached near 29.0 
Feb 2016

It also suggests a start of the drift at 23.0 Jan 2016 (two days later than I 
initially deduced using a different (apparently too) quick assessment).

Unfortunately 75 E is out of reach for both Leiden and Warrumbungle.

- Marco

Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.

Cospar 4353 (Leiden):   52.15412 N, 4.49081 E (WGS84), +0 m ASL
Cospar 4355 (Cronesteyn): 52.13878 N, 4.49937 E (WGS84), -2 m ASL
Station (b)log:
Twitter: _at_Marco_Langbroek
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Received on Thu Mar 03 2016 - 03:49:05 UTC

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