Re: ZUMA search elset estimates

From: Marco Langbroek via Seesat-l <seesat-l_at_satobs.org>
Date: Wed, 3 Jan 2018 00:01:50 +0100
Op 2-1-2018 om 21:27 schreef Marco Langbroek via Seesat-l:
> 
> The launch has been postponed by a day to January 6.
> 
> - Marco


Here are some new elset estimates for the new date of January 6th, for three
launch times. The first set of three is based on Ted Molczan's original orbit
estimate from November:

ZUMA 1:00 UT
1 70000U 18999A   18006.04166668  .00011340  00000-0  15763-3 0    02
2 70000  50.0032 014.0636 0015627 353.6173  21.6500 15.55612078    02

ZUMA 2:00 UT
1 70001U 18999A   18006.08333335  .00011340  00000-0  15763-3 0    04
2 70001  50.0032 029.1047 0015627 353.6173  21.6500 15.55612078    06

ZUMA 3:00 UT
1 70002U 18999A   18006.12500001  .00011340  00000-0  15763-3 0    06
2 70002  50.0032 044.1458 0015627 353.6173  21.6500 15.55612078    00



The second alternative set I constructed from the launch azimuth, an estimate of
the orbit insertion point (and assuming insertion into perigee), and an assumed
395 x 405 km orbit:


ZUMA launch 2018-01-06 01:00:00 UT
1 70005U 18999A   18006.04166667  .00000000  00000-0  00000-0 0    02
2 70005 049.9992 014.5976 0007377 049.0381 324.6717 15.55741113    00

ZUMA launch 2018-01-06 02:00:00 UT
1 70006U 18999A   18006.08333333  .00000000  00000-0  00000-0 0    03
2 70006 049.9992 029.6387 0007377 049.0381 324.6717 15.55741113    04

ZUMA launch 2018-01-06 03:00:00 UT
1 70007U 18999A   18006.12500000  .00000000  00000-0  00000-0 0    06
2 70007 049.9992 044.6797 0007377 049.0381 324.6717 15.55741113    07

For more details, see my previous post here:
http://www.satobs.org/seesat/Jan-2018/0008.html

I'll update if the launch gets further postponed.

- Marco


-----
Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.
e-mail: sattrackcam_at_langbroek.org

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: http://sattrackcam.blogspot.com
Twitter: _at_Marco_Langbroek
-----
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Received on Tue Jan 02 2018 - 17:02:34 UTC

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