All,

    The spacecraft is nominal and the inertial maneuver was successful. During this evening’s AUS contact (23:30 - 00:30 UTC) the 160k downlink dropped out. I sent commands to reduce the tlm rate but the station still didn’t re-acquire. The uplink was dropped and the station looked for a non-coherent signal but did not see one. The uplink was brought up again and the station reported seeing a signal but did not get a lock on tlm. They also reported seeing a signal after the scheduled time-tagged Tx off time so I sent a Tx off command, just in case. I scheduled a USAK01 contact 28 Nov20@02:20 – 02:30. We were able to blind acq the spacecraft @2k and check the spacecraft state of health. I have requested a DR for the AUWA01 support.

Tasks Accomplished:

SSR Dump -> Dump New

CAR #1136 ATS Upload

   IBEX_2020_341_o0509a_LGC_V001

CAR #1137 ATS Upload

   IBEX_2020_341_o0510a_BUS_V001

CAR #1135 Dump Orbit 508 Missing data

Set Spacecraft Clock

Results from the Inertial Maneuver:

Q1 0.81887900 ActNor.EstInrToBdy[0]

Q2 -0.07721920 ActNor.EstInrToBdy[1]

Q3 -0.22977000 ActNor.EstInrToBdy[2]

Q4 0.52027000 ActNor.EstInrToBdy[3]

GPS sec 1290555041 ActNor.EstTime

UTC time 11/27/2020 23:30:27 output

MPS Cmd Vector X -0.452865000

MPS Cmd Vector Y -0.814406000

MPS Cmd Vector Z -0.362845000

MPS Diff 0.614 deg

CSS Angle TLM 0.497715

CSS Sun-Pointing Angle 0.99543

22 Nov 20 @ 21:00:00

CSS Angle TLM 0.410216

CSS Sun-Pointing Angle 0.820432

27 Nov 20 @ 23:30:00

Pre-Burn

Thruster 1 304 22 Nov 20 @ 21:00:00

Thruster 2 304

Thruster 3 288

Thruster 4 288

Post-Burn `

Thruster 1 608 27 Nov 20 @ 23:30:00

Thruster 2 560

Thruster 3 592

Thruster 4 640

Number of Pulses

Thruster 1 304

Thruster 2 256

Thruster 3 304

Thruster 4 352

Thruster Pairs

Thruster 1 & 2 560

Thruster 3 & 4 656

Timothy E.Perry

CRS IBEX OCO-2

Mission Operations

timothy.perry@ngc.com

Office (703) 406-5976

Cell (301) 606-1430