[Isocops] IBEX Goat Herder for 15, 16, and 20 July 2019

[Chubin, Eric]

All,

The Apogee pass was nominal for CMD and TLM. Battery balancing and the Inertial maneuver were nominal.
During the Apogee pass for July 20 it was noted that ACS Uptime count had rolled over and continued incrementing from zero. The thruster on-time counts had not reset. Part 1 of CAR #1004 ACE Reset Recovery was executed to re-enable FDC in the event that an actual ACE reset had occurred (S924 - OP31203). Step 2 of the CAR was not executed because the Static Z rate and Spin Rate were within family. The post-pass playback data was used to determine that the ACS Uptime had indeed only rolled over and that an ACE reset had not occurred.

The following was completed:
July 15
Reset Master Timer

July 16
CAR #1049 Orbit #455 ATS, Uplinked 91 commands
Back-orbit Buffer Downlink

July 20
Back-orbit Buffer Downlink

Results from the maneuver:
Q1 -0.43644900 ActNor.EstInrToBdy[0]
Q2 0.35910200 ActNor.EstInrToBdy[1]
Q3 0.75758100 ActNor.EstInrToBdy[2]
Q4 0.32654200 ActNor.EstInrToBdy[3]
GPS sec 1247662797 ActNor.EstTime
UTC time 07/20/2019 12:59:43 output
MPS Diff 0.670 deg
MPS Cmd Vector X -0.426215000
MPS Cmd Vector Y 0.833974000
MPS Cmd Vector Z 0.350469000

CSS Angle TLM   0.694925
CSS Sun-Pointing Angle   1.38985
16 July 19 @ 04:30
CSS Angle TLM   0.530449
CSS Sun-Pointing Angle   1.060898
20 July 19 @ 13:00

Pre-Burn
Thruster 1 14816 16 July 19 @ 04:30
Thruster 2 14432
Thruster 3 17600
Thruster 4 17984
Post-Burn
Thruster 1 14944 20 July 19 @ 13:00
Thruster 2 14560
Thruster 3 17776
Thruster 4 18160
Number of Pulses
Thruster 1 128
Thruster 2 128
Thruster 3 176
Thruster 4 176
Thruster Pairs
Thruster 1 & 2    256
Thruster 3 & 4    352



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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