All,

 

The Apogee pass was nominal for CMD and TLM. Battery balancing and the Inertial maneuver were nominal.

During the Apogee pass for July 20 it was noted that ACS Uptime count had rolled over and continued incrementing from zero. The thruster on-time counts had not reset. Part 1 of CAR #1004 ACE Reset Recovery was executed to re-enable FDC in the event that an actual ACE reset had occurred (S924 – OP31203). Step 2 of the CAR was not executed because the Static Z rate and Spin Rate were within family. The post-pass playback data was used to determine that the ACS Uptime had indeed only rolled over and that an ACE reset had not occurred.

 

The following was completed:

July 15

Reset Master Timer

 

July 16

CAR #1049 Orbit #455 ATS, Uplinked 91 commands

Back-orbit Buffer Downlink

 

July 20

Back-orbit Buffer Downlink

 

Results from the maneuver:

Q1 -0.43644900 ActNor.EstInrToBdy[0]

Q2 0.35910200 ActNor.EstInrToBdy[1]

Q3 0.75758100 ActNor.EstInrToBdy[2]

Q4 0.32654200 ActNor.EstInrToBdy[3]    

GPS sec 1247662797 ActNor.EstTime       

UTC time 07/20/2019 12:59:43 output

MPS Diff 0.670 deg

MPS Cmd Vector X -0.426215000

MPS Cmd Vector Y 0.833974000

MPS Cmd Vector Z 0.350469000

 

CSS Angle TLM   0.694925            

CSS Sun-Pointing Angle   1.38985

16 July 19 @ 04:30

CSS Angle TLM   0.530449            

CSS Sun-Pointing Angle   1.060898            

20 July 19 @ 13:00

 

Pre-Burn                          

Thruster 1 14816 16 July 19 @ 04:30

Thruster 2 14432             

Thruster 3 17600             

Thruster 4 17984             

Post-Burn                         

Thruster 1 14944 20 July 19 @ 13:00

Thruster 2 14560             

Thruster 3 17776             

Thruster 4 18160             

Number of Pulses                          

Thruster 1 128   

Thruster 2 128   

Thruster 3 176   

Thruster 4 176   

Thruster Pairs                  

Thruster 1 & 2    256       

Thruster 3 & 4    352       

 

 

 

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

OCO2 MOC#: (703) 429 - 7015

Mobile#: (240) 328 - 2098

Eric.Chubin@ngc.com

 
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