All,

    The apogee contact was nominal for CMD & TLM. The inertial maneuver was successful. There was another star tracker reset during the back orbit period. The tracker recovered and was @75 percent valid @ AOS. FDC Totals and Response latch values were reset during the contact. I was able to change the downlink from 2K up to 40k and dump the flight computer back orbit data. Unfortunately the data didn’t go back far enough to see the tracker reset. Razor number for the Star Tracker reset is I100-683.

Task Accomplished:

Set Downlink to 40k

CAR 344 – Reset FDC Totals and Response latch values

Dumped Flight Computer Back Orbit Data

Inertial Maneuver Results:

Q1 -0.18513800 ActNor.EstInrToBdy[0]

Q2 0.80191600 ActNor.EstInrToBdy[1]

Q3 -0.54701700 ActNor.EstInrToBdy[2]

Q4 0.15305700 ActNor.EstInrToBdy[3]

GPS sec 1294765701 ActNor.EstTime

UTC time 01/15/2021 17:08:07 output

MPS Cmd Vector X 0.451394000

MPS Cmd Vector Y -0.815041000

MPS Cmd Vector Z -0.363251000

MPS Diff 0.618 deg

CSS Angle TLM 0.786386

CSS Sun-Pointing Angle 1.572772

11 Jan 21 @ 21:00:00

CSS Angle TLM 1.23353

CSS Sun-Pointing Angle 2.46706

15 Jan 21 @ 17:00:00

Pre-Burn

Thruster 1 352 11 Jan 21 @ 21:00:00

Thruster 2 352

Thruster 3 368

Thruster 4 368

Post-Burn `

Thruster 1 624 15 Jan 21 @ 17:00:00

Thruster 2 624

Thruster 3 656

Thruster 4 656

Number of Pulses

Thruster 1 272

Thruster 2 272

Thruster 3 288

Thruster 4 288

Thruster Pairs

Thruster 1 & 2 544

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