NROL-79 search elements

From: Ted Molczan via Seesat-l <seesat-l_at_satobs.org>
Date: Mon, 27 Feb 2017 20:07:00 -0500
NROL-79 is scheduled for launch on an Atlas V-401, from VAFB, on 2017 Mar 01, at 17:50 UTC, within a one hour launch
period that opens at 17:30 UTC. The primary payload is the NOSS 3-8 pair of satellites. The planar window opens about 14
min. earlier each day.

Live coverage will be available here:

http://spaceflightnow.com/2017/02/27/av068_journal/

The NOSS 3-8 plane will be located approximately mid-way between those of NOSS 3-6 and NOSS 3-7.

Here are estimated initial elements, assuming launch at 17:50 UTC:

NOSS 3-8                                               1013 X 1200 km
1 79751U          17060.82372686  .00000000  00000-0  00000-0 0    08
2 79751  63.4283 150.7140 0124892 180.5274 352.9095 13.40429195    09

The above are derived from the NOSS 3-6 and NOSS 3-7 launches. Twenty-four hours after launch, allow for at least
several minutes time error, and several degrees of track error on high elevation passes.

The Centaur will be de-orbited on the first rev after launch, near 45.75 S, 102.85 W.

Observers north of about 35 N, will have visibility after midnight. Visibility improves with increasing latitude.
Southern hemisphere observers will have evening visibility.

Here is my post on the effects of a significant orbital perturbation that affects the NOSS orbit, and how it is managed
by the NOSS 3 satellites:

http://satobs.org/seesat/Jul-2015/0149.html

More information on the U.S. NOSS and China's copy of an earlier U.S. three-satellite NOSS system is available here:

http://www.satobs.org/noss.html

Happy hunting!
Ted Molczan


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Received on Mon Feb 27 2017 - 19:07:46 UTC

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