All,

   The spacecraft is nominal. The inertial maneuver was successful. We completed pass 1 for CAR #1302 “IBEX Orbit 622 Hi Background and star sensor telemetry cadence increase”. The Hi sweep table was commanded to background mode and the star sensor cadence was increased. The Hi will stay in background mode for the complete orbit. We will command it back to normal sweep on 09/30/23.

   The Orbit 623 ATS was uplinked, The SSR was dumped with zero errors during the contact the spacecraft clock was set, and the master timer was reset.

  We did have an issue with the file delivery from the AUWA01 contact. Something happened during the file transfer and the files were empty. SSC is working on restoring the files. The files were both the realtime VCID0 and the SSR Dump VCID2 files.

    We did another test with the string 1 maestro Linux server. We were successful in sending a timed command and verifying its successful execution. The fast page issue was also fixed. We were able to verify both numeric and enumerated values. Commanding was nominal.

Tasks Accomplished:

CAR #1302 “IBEX Orbit 622 Hi Background and star sensor telemetry cadence increase”

    Pass 1 Upload Hi Background Sweep table and increase star sensor telemetry.

CAR 1340 Orbit 623 ATS Upload

    IBEX_2023_272_o0623a_v001 98 commands

Reset FDC Totals

SSR Dump -> Dump New

Set Spacecraft Clock

Results from the Inertial Maneuver:

Q1 0.65986600 ActNor.EstInrToBdy[0]

Q2 -0.21102100 ActNor.EstInrToBdy[1]

Q3 -0.70296100 ActNor.EstInrToBdy[2]

Q4 0.16091200 ActNor.EstInrToBdy[3]

GPS sec 1379269864 ActNor.EstTime

UTC time 09/20/2023 18:30:50 output

MPS Diff 0.815 deg

MPS Cmd Vector X -0.99624200

MPS Cmd Vector Y 0.082624000

MPS Cmd Vector Z 0.025985000

CSS Angle TLM 0.227087

CSS Sun-Pointing Angle 0.454174

  16 Sept 23@23:00:00

CSS Angle TLM 0.258688

CSS Sun-Pointing Angle 0.517376

  20 Sept 23@18:30:00

Pre-Burn

Thruster 1 11842 16 Sept 23@23:00:00

Thruster 2 11552

Thruster 3 14096

Thruster 4 14368

Post-Burn

Thruster 1 12096 20 Sept 23@18:30:00

Thruster 2 11824

Thruster 3 14384

Thruster 4 14656

Number of Pulses

Thruster 1 254

Thruster 2 272

Thruster 3 288

Thruster 4 288

Thruster Pairs 

Thruster 1 & 2 526

Thruster 3 & 4 576

Timothy E.Perry

CRS IBEX OCO-2

Mission Operations

timothy.perry@ngc.com

Office (703) 406-5976

Cell (301) 606-1430