Re: Two extra orbit variants (Re: NROL-47 search elset and identity)

From: Marco Langbroek via Seesat-l <>
Date: Wed, 10 Jan 2018 17:04:23 +0100
Op 10-1-2018 om 14:55 schreef Marco Langbroek via Seesat-l:

> Here are two extra variants that assume initial launch into a 108.6 deg inclined
> orbit, and next an inclination changing manoeuvre at first nodal crossing, into
> a 123.0 degree inclined orbit> [...]
> Changing the RAAN in the above elsets to ~100.0 degrees would place the
> satellite exactly in the FIA Radar 1 orbital plane.

This could be effected by a second, on-orbit manoeuvre during the first southern
Polar pass, where the orbital planes cross. This would align the RAAN, moving
the satellite into the plane of FIA Radar 1. I think this is what might have
happened with the FIA Radar 3 launch

This still begs the question why they would not launch directly into a 123 deg
inclination anyway, as with all previous FIA launches.

- 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
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Received on Wed Jan 10 2018 - 10:05:19 UTC

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