All,

   The perigee contacts were nominal for CMD and TLM. The Auwa01 24 March21@07:00 had a fluctuating Receive AGC. Because of that we dropped 2 commands from the Orbit 523 Instrument ATS. Those commands were resent during the USHI02 contact 25 March 21 @04:00. We were able to complete pass 8 of CAR #1119 ISN Season and Hi background sweep tables. The Hi normal sweep table was uplinked successfully. Ran script Find_TG_Entry.scr 2x to verify a step in the contingency recovery procedure that is being developed. The inertial maneuver was successful. the 18 day master timer reset nominally and was back to 10. The total timed commands onboard at LOS was 180.

Tasks Accomplished:

Find_TG_Entry.scr 2x

Set Spacecraft Clock

CAR #1119 ISN Season and Hi background sweep tables – Pass 8 – Hi normal Sweep table

CAR #1157 Orbit 523 ATS upload:

    IBEX_2021_093_o0523a_BUS_V001 41 cmds

    IBEX_2021_093_o0523a_INST_V001 46 cmds

Set Spacecraft Clock

CAR # 1155 Redump Orbit #521 SSR missing blocks

Reset 2 Instrument commands for Orbit 523

Results from the Inertial maneuver:

Q1 0.11303900 ActNor.EstInrToBdy[0]

Q2 0.69274700 ActNor.EstInrToBdy[1]

Q3 0.13457900 ActNor.EstInrToBdy[2]

Q4 0.69943700 ActNor.EstInrToBdy[3]

GPS sec 1300681427 ActNor.EstTime

UTC time 03/25/2021 04:23:33 output

MPS Cmd Vector X 0.999417000

MPS Cmd Vector Y 0.033783000

MPS Cmd Vector Z 0.004869000

MPS Diff 0.643 deg

CSS Angle TLM 0.582491

CSS Sun-Pointing Angle 1.164982

20 Mar 21 @ 13:00:00

CSS Angle TLM 0.918132

CSS Sun-Pointing Angle 1.836264

25 Mar 21 @ 04:00:00

Pre-Burn

Thruster 1 3840 20 Mar 21 @ 13:00:00

Thruster 2 3712

Thruster 3 5328

Thruster 4 5456

Post-Burn

Thruster 1 4112 25 Mar 21 @ 04:00:00

Thruster 2 3984

Thruster 3 5664

Thruster 4 5792

Number of Pulses

Thruster 1 272

Timothy E.Perry

CRS IBEX OCO-2

Mission Operations

timothy.perry@ngc.com

Office (703) 406-5976

Cell (301) 606-1430