[Isocops] IBEX Orbit# 85 ATS (12July - 20 July 10) Part 2

Mark Tapley mtapley at swri.edu
Fri Jul 2 12:47:04 EDT 2010


Looking at: IBEX_2010_193_00_00_v002.txt as attached to Tim's email.

Checked the PL commands; I think they match what was in the .stf and 
they look correct for this orbit.

Checked the pointing resulting from the maneuver:

[tapley at ena ~]$ ibex_rotate -o -u 
-0.4625010671959609,0.8133201951554043,0.35299153388568977 -w 
ibex-sun -t 2010/07:19:12:29:41
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  -0.462501,+0.813320,+0.352992
  which is     R.A. +119.625 Decl. +20.670
  missing      R.A. +118.642 Decl. +20.818 (ibex-sun)
  error is     R.A.   +0.983 Decl.  +0.147
  for a total  0.931 deg
[tapley at ena ~]$ ibex_rotate -o -u 
-0.4625010671959609,0.8133201951554043,0.35299153388568977 -w 
ibex-sun -t 2010-07-20T03:09:44.545Z
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  -0.462501,+0.813320,+0.352992
  which is     R.A. +119.625 Decl. +20.670
  missing      R.A. +119.232 Decl. +20.741 (ibex-sun)
  error is     R.A.   +0.393 Decl.  +0.070
  for a total  0.374 deg
[tapley at ena ~]$ ibex_rotate -o -u 
-0.4625010671959609,0.8133201951554043,0.35299153388568977 -w 
ibex-sun -t 2010-07-26T21:38:35.917Z
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  -0.462501,+0.813320,+0.352992
  which is     R.A. +119.625 Decl. +20.670
  missing      R.A. +125.981 Decl. +19.316 (ibex-sun)
  error is     R.A.   +6.356 Decl.  +1.354
  for a total  6.124 deg


At time of maneuver, points 0.931 degrees from sun.
At time of next 15 Re going up (per .oef), 0.374 degrees.
At time of next 15 Re going down (per .oef), 6.124 degrees.

Looks correct to me.

Radio contacts fall within the ground contact times.

I approve.

At 16:43 -0400 7/1/10, Tim Perry wrote:
>All,
>    Attached is the ATS for rev 85. This version has the battery balancing
>added to it. Eclipse flag will be set to true  from July 19, 13:00:00 -
>14:30:00.
>        Tim
>
>
>(See attached file: IBEX_2010_193_00_00_v002.txt)
>
>Timothy Perry
>IBEX Mission Ops Lead
>Orbital Sciences Corp
>Space Systems Group
>Office: (703) 406-5976
>Cell: (301) 606-1430
>perry.tim at orbital.com
>

-- 
						- Mark     210-379-4635
-----------------------------------------------------------------------
Large Asteroids headed toward planets
inhabited by beings that don't have
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				Think of it as Evolution in Fast-Forward.



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