Re: X-37B OTV 4 Search Elements

From: Charles Phillips via Seesat-l <seesat-l_at_satobs.org>
Date: Tue, 19 May 2015 19:47:02 -0500 (CDT)
All -

Just a note that the Centaur will change inclination by 18 degrees, that is a
LOT of capability!

Charles D Phillips
Intelligent Commercial Spaceflight
713-882-4578
www.intelligentcommercialspaceflight.com

Ted said:

> From: Ted Molczan via Seesat-l <seesat-l_at_satobs.org> 
> Date: Mon, 18 May 2015 15:37:31 -0400
> The AFSPC-5 mission will orbit X-37B OTV 4 and ten cubesats. It is scheduled
> for launch from CCAFS on an Atlas V-501
> rocket, on 2015 May 20, during a launch period that begins at 14:45 UTC. Based
> on the NOTAMs, I believe that the launch
> is scheduled to occur ~20 min later, at 15:05 UTC.

> A timely query from Craig Covault got me working on the orbit estimate sooner
> than I had planned, the results of
> which are reflected in his article below, and in my following analysis.

> http://www.americaspace.com/?p=82099#more-82099

> 1. OTV orbit

> The NOTAM coordinates reveal a launch azimuth of 61 deg, which indicates a 39
> deg inclination orbit:

> http://satobs.org/seesat_ref/misc/OTV4_Ascent_NOTAM.jpg

> Earlier OTV launches were to azimuth ~108 deg, which normally would have
> resulted in a 33 deg inclination; however, yaw
> steering enabled OTV 1, 2 and 3 to reach respective inclinations of 40.0 deg,
> 42.8 deg and 43.5 deg.
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Received on Tue May 19 2015 - 19:47:45 UTC

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