[Isocops] IBEX Goat Herder for 07 & 08 Dec 2019

[Chubin, Eric [US] (IS)]

All,

The passes were nominal for CMD and TLM. The Inertial maneuver was successful. The 12:00z DOY 341 contact had a late AOS due to a station issue and once AOS was established a spacecraft ACE reset was noted. MOC carried out standing CARs to correct the ACE reset. Once ACE reset was recovered, Pass #2 Upload Lo ISN Sweep Table of CAR #1063 was executed. The ACE reset occurred on DOY 339 08:44:40 UTC.

The SSR downlink for 05:00 DOY 342 was cut short by LOS. The pointers were reset. At LOS the pointer information was:
SSR Write Pointer: 4508
SSR Read Pointer: 4464
Remaining Blocks: 4095

The following activities were completed over the passes:
CAR #1004 ACE Reset Recovery
Back-Orbit buffer downlink
CAR #1063 Pass 2 Upload Lo ISN Sweep Table
CAR #1076 Upload Orbit #471 ATS (IBEX_2019_351_o0471a_v001.scr)
Reset S/C Master Timer
SSR Dump New and Reset Pointer

Results from the Inertial Maneuver:
Q1 0.68226900 ActNor.EstInrToBdy[0]
Q2 -0.47742500 ActNor.EstInrToBdy[1]
Q3 0.18956900 ActNor.EstInrToBdy[2]
Q4 0.52022800 ActNor.EstInrToBdy[3]
GPS sec 1259817775 ActNor.EstTime

UTC time 12/08/2019 05:22:41 output
MPS Diff 0.593 deg
CSS Angle TLM   0.561277
CSS Sun-Pointing Angle   1.122554
  28 Nov 19 @ 23:30
CSS Angle TLM   0.513581
CSS Sun-Pointing Angle   1.027162
  07 Dec 19 @ 05:00

Pre-Burn
Thruster 1 0 02 Dec 19 @ 23:30
Thruster 2 0
Thruster 3 0
Thruster 4 0
Post-Burn
Thruster 1 416    07 Dec 19 @ 05:00
Thruster 2 416
Thruster 3 432
Thruster 4 432
Number of Pulses
Thruster 1 416
Thruster 2 416
Thruster 3 432
Thruster 4 432
Thruster Pairs
Thruster 1 & 2    832
Thruster 3 & 4    864


Note* Thruster total counts prior to ACE reset were:
21680    02 Dec 19 @ 23:30
21008
28320
28992




Eric Chubin
Mission Operations Engineer - OCO2, IBEX
Northrop Grumman Innovation Systems
OCO2 MOC#: (703) 429 - 7015
Mobile#: (240) 328 - 2098
Eric.Chubin at ngc.com

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