All,

   The perigee contacts were nominal for CMD and TLM with the exception of the beginning of the USHI01 contact DOY231 @1700. The USHI01 contact @1700 DOY 231 was unable to get bit sync lock on the downlink data stream. USHI02 was made available and we were able to switch over to the station and finish the planned time and procedure that was being run. I will contact SSC in the morning to get a DR number.

    Since the master reset we have been planning to check the known bad locations on the SSRA and see if the reset had cleared the bad locations. We scheduled 3 contacts 2 @1.5 hours and 1 @ 1 hour. We performed the nominal perigee SSR dump. Then we set the pointers to 47000 let it record for a while then dumped the data. The second time we set the pointers 66000, let it record and dump the suspect locations. We also dumped the flight computer back orbit data after each time we set the pointers. All the data has been archived and is being analyzed for bad or missing data locations.

   The Orbit 499 Instrument ATS has been uplinked. The 18 day timer command executed and the counter was reset back to 10.

 

Tasks that were accomplished:

CAR # 1108 – Dump Orbit 496 SSR missing blocks

CAR # 1109 - ATS Upload – IBEX_2020_241_o0499a_INST_V001 46 Cmds

CAR # 1110 – Dump Orbit 497 SSR data and reset SSR read & write pointers to test bad SSR Blocks

2 Flight Computer Back Orbit data dump

 

 

 

Results from the Inertial Maneuver:

Q1 0.20823100 ActNor.EstInrToBdy[0]

Q2 -0.58058000 ActNor.EstInrToBdy[1]

Q3 -0.63493900 ActNor.EstInrToBdy[2]

Q4 0.46520900 ActNor.EstInrToBdy[3]

     

GPS sec 1281845165 ActNor.EstTime

     

UTC time 08/19/2020 04:05:51 output

MPS Diff 0.786 deg

 

MPS Cmd Vector X -0.808309000

MPS Cmd Vector Y 0.543673000

MPS Cmd Vector Z 0.225954000

 

CSS Angle TLM 0.716525

CSS Sun-Pointing Angle 1.43305

  14 Aug 20 @ 10:00

 

CSS Angle TLM 0.300666

CSS Sun-Pointing Angle 0.601332

  19 Aug 20 @ 04:00

 

Pre-Burn   

Thruster 1 2256 14 Aug 20 @ 10:00

Thruster 2 2192

Thruster 3 2608

Thruster 4 2672

Post-Burn   `

Thruster 1 2560 19 Aug 20 @ 04:00

Thruster 2 2464

Thruster 3 2912

Thruster 4 3008

Number of Pulses  

Thruster 1 304

Thruster 2 272

Thruster 3 304

Thruster 4 336

Thruster Pairs 

Thruster 1 & 2 576

Thruster 3 & 4 640

 

 

 

 

Timothy E. Perry

Mission Operations

CRS, IBEX, OCO-2

timothy.perry@ngc.com

Office (703) 406-5976

Cell (301) 606-1430