All,

The passes were nominal for CMD and TLM. The Inertial maneuver was successful. The 12:00z DOY 341 contact had a late AOS due to a station issue and once AOS was established a spacecraft ACE reset was noted. MOC carried out standing CARs to correct the ACE reset. Once ACE reset was recovered, Pass #2 Upload Lo ISN Sweep Table of CAR #1063 was executed. The ACE reset occurred on DOY 339 08:44:40 UTC.

The SSR downlink for 05:00 DOY 342 was cut short by LOS. The pointers were reset. At LOS the pointer information was:

SSR Write Pointer: 4508

SSR Read Pointer: 4464

Remaining Blocks: 4095

The following activities were completed over the passes:

CAR #1004 ACE Reset Recovery

Back-Orbit buffer downlink

CAR #1063 Pass 2 Upload Lo ISN Sweep Table

CAR #1076 Upload Orbit #471 ATS (IBEX_2019_351_o0471a_v001.scr)

Reset S/C Master Timer

SSR Dump New and Reset Pointer

Results from the Inertial Maneuver:

Q1 0.68226900 ActNor.EstInrToBdy[0]

Q2 -0.47742500 ActNor.EstInrToBdy[1]

Q3 0.18956900 ActNor.EstInrToBdy[2]

Q4 0.52022800 ActNor.EstInrToBdy[3]                   

GPS sec 1259817775 ActNor.EstTime

UTC time 12/08/2019 05:22:41 output

MPS Diff 0.593 deg

CSS Angle TLM   0.561277            

CSS Sun-Pointing Angle   1.122554            

  28 Nov 19 @ 23:30

CSS Angle TLM   0.513581            

CSS Sun-Pointing Angle   1.027162            

  07 Dec 19 @ 05:00

Pre-Burn

Thruster 1 0 02 Dec 19 @ 23:30

Thruster 2 0       

Thruster 3 0       

Thruster 4 0       

Post-Burn

Thruster 1 416    07 Dec 19 @ 05:00

Thruster 2 416   

Thruster 3 432   

Thruster 4 432   

Number of Pulses

Thruster 1 416   

Thruster 2 416   

Thruster 3 432   

Thruster 4 432   

Thruster Pairs   

Thruster 1 & 2    832       

Thruster 3 & 4    864       

Note* Thruster total counts prior to ACE reset were:

21680    02 Dec 19 @ 23:30

21008   

28320   

28992   

Eric Chubin
Mission Operations Engineer - OCO2, IBEX
Northrop Grumman Innovation Systems

OCO2 MOC#: (703) 429 - 7015

Mobile#: (240) 328 - 2098

Eric.Chubin@ngc.com