[Isocops] IBEX Goat Herder 27 & 28 November 2020

[Perry, Timothy E [US] (IS)]

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 at 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 at ngc.com
Office (703) 406-5976
Cell (301) 606-1430

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