[Isocops] IBEX Orbit# 114 SSR_Dump Contact 25 Feb 11 @ 1945 UTC

Mark Tapley mtapley at swri.edu
Fri Feb 25 19:05:31 EST 2011


Not surprisingly, pointing looks good for ascent, descent following, 
and at the time of the maneuver, respectively:

[tapley at ena ~]$ ibex_rotate -o -u 0.925310,-0.352226,-0.140492 -w 
ibex-sun -t 2011-02-26T09:27:24.224Z
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.925310,-0.352226,-0.140492
  which is     R.A. +339.160 Decl.  -8.076
  missing      R.A. +338.996 Decl.  -8.818 (ibex-sun)
  error is     R.A.   +0.165 Decl.  +0.742
  for a total  0.759 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.925310,-0.352226,-0.140492 -w 
ibex-sun -t 2011-03-05T07:06:13.426Z
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.925310,-0.352226,-0.140492
  which is     R.A. +339.160 Decl.  -8.076
  missing      R.A. +345.445 Decl.  -6.241 (ibex-sun)
  error is     R.A.   +6.285 Decl.  +1.835
  for a total  6.500 deg
[tapley at ena ~]$ ibex_rotate -o -u 0.925310,-0.352226,-0.140492 -w 
ibex-sun -t 2011-02-25T18:36:00.000Z
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
  points axis  +1.000000,+0.000000,+0.000000
  towards ECI  +0.925310,-0.352226,-0.140492
  which is     R.A. +339.160 Decl.  -8.076
  missing      R.A. +338.383 Decl.  -9.091 (ibex-sun)
  error is     R.A.   +0.777 Decl.  +1.015
  for a total  1.273 deg


At 16:20 -0500 2/25/11, Ibex Mission Operations wrote:
>Guys,
>      Here are the current J2000 Target Vectors after the inertial 
>maneuver 25 Feb 11 @ 1836 UTC
>The ATS for ORbit# 116 was uploaded and the SSR was dumped with (0) errors
>VC1=1492/1
>VC2= 19532/0
>
>
>J2000 Spin Axis ECI X 0.925310 ECI Y -0.352226 ECI Z -0.140492
>
>0.60505400 ActNor.EstInrToBdy[0] 0.45183600 ActNor.EstInrToBdy[1] 
>0.35135200 ActNor.EstInrToBdy[2] 0.55344900 ActNor.EstInrToBdy[3] 
>  982699000.000 ActNor.EstTime
>
>IBEX Spin Zxis (+Z S/C) Right Ascension - RA 339.160 deg Declination 
>- DEC -8.076 deg                   IBEX Spin Axis vs. Sun Vector 
>IBEX Sun Angle 1.091 deg
>
>
>Precession Maneuver   MPS Diff 0.631 deg   MPS Diff should be < 1.5  
>
>
>--
>Sheral R. Wesley
>SPVR., Satellite Operations
>IBEX Mission OPS
>(304) 279-6678


-- 
						- Mark     210-379-4635
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