New NROL-47 elset predictions

From: Ted Molczan via Seesat-l <seesat-l_at_satobs.org>
Date: Fri, 12 Jan 2018 16:22:26 -0500
Here are Marco Langbroek's NROL-47 elsets, updated for launch tonight, 12 January 22:11 UT. 

Text is as Marco wrote. Coverage is here:

https://spaceflightnow.com/2018/01/10/delta-4-nrol-47-mission-status-center/

First, taking the launch azimuth at face value (resulting in a 108.6 degree
inclined orbit), for two altitude variants, one ~1500 km orbital altitude and
one for a FIA-like ~1100 km orbital altitude:

NROL-47 1495 X 1505
1 70000U 18999A   18012.92430560  .00000000  00000-0  00000-0 0    07
2 70000 108.6398 132.8038 0006347 166.4011 308.2684 12.41559515    07

NROL-47 1100 X 1110
1 70001U 18999A   18012.92430561  .00000000  00000-0  00000-0 0    09
2 70001 108.5831 132.8038 0006682 166.4011 304.1188 13.41149813    02

Second, two more altrenative elset (for the same two altitude variants) that
assume an inclination-changing manoeuvre into a 123.0 degree inclined FIA-like
orbit upon first nodal passage:

NROL-47 ALT 1495 X 1505
1 70004U 18999A   18012.93888891  .00000000  00000-0  00000-0 0    06
2 70004 123.0000 132.8161 0006347 179.9597 359.9483 12.41559515    07

NROL-47 ALT 1100 X 1110
1 70005U 18999A   18012.93578707  .00000000  00000-0  00000-0 0    09
2 70005 123.0000 132.8325 0006682 180.0080 359.9441 13.41149813    03

For more background details, see Marco's earlier posts here:

http://www.satobs.org/seesat/Jan-2018/0080.html

and here:

http://www.satobs.org/seesat/Jan-2018/0089.html

Ted Molczan

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Received on Fri Jan 12 2018 - 15:23:23 UTC

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