Tianhui 2 Launch - NOTAM Error

From: Bob Christy via Seesat-l <seesat-l_at_satobs.org>
Date: Sat, 21 Aug 2021 10:43:22 +0000
NOTAMs for launch on August 18 included times that were off by ten minutes.

The explanation is that China uses two distinctly different azimuths for Taiyuan launches to Sun-synchronous orbit. They differ by 2.5° in RAAN at orbital injection.

This launch was targeting a specific RAAN. The NOTAM used times based on the 'wrong' launch azimuth.

I've put some notes here, together with a track map, illustrating the two different launch profiles:

Robert Christy
Seesat-l mailing list
Received on Sat Aug 21 2021 - 05:44:04 UTC

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