[Isocops] IBEX Gaot Herder for 1 December 2024 ***Failed Contacts***

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

All,
  We performed a successful test of the Lo ISN season gain test sweep table tonight. The new Lo Background table is now loaded with Energy Step 3 for every step of the sweep and the instrument is back to using its normal table. The inertial maneuver was successful. The Orbit 670 ATS was successfully uplinked. The SSR Dump had a high number of errors, so the contact Auwa01 @ 07:00gmt was failed. We also failed the USHI01 contact 1 Dec @20:00gmt. We never did get a good signal from them. We started @320k downlink with a Eb/No of 2.0 -> 6.4 with it occasionally dropping down to 0.2. We tried dropping the data rate down to 160k and the Eb/No was about the same 2.4 -> 4.6. This should have gone up about 3 DB from the 320k Eb/No. We decided to drop the data rate 40k. This should have given us about a 10 DB increase in our Eb/No. It didn't change the Eb/No levels.

These are the 2 failed contacts:
AUWA01 12/01/24,336,07:00:00,336,08:00:00 320K IBEX-3 Orbit# 669 SSR_Dump/Tracking Contact 11re Desc
USHI01 12/01/24,336,20:00:00 ,336,21:00:00 320K IBEX-3 Orbit# 669 SSR_Dump/Tracking Contact 10.5re Asc
Tasks Accomplished:
Reset FDC Totals
Reset Master Timer
SSR Dump -> Dump New
Set Static Z Rate
CAR # 1420 - IBEX Lo ISN Season Gain Test Sweep Table
CAR # 1431 - Redump Orbit 668 Blocks
CAR # 1432 - Orbit 670 ATS Upload

Results from the Inertial Maneuver:
Q1 -0.26143800 ActNor.EstInrToBdy[0]
Q2 -0.78455300 ActNor.EstInrToBdy[1]
Q3 0.56041000 ActNor.EstInrToBdy[2]
Q4 0.04537380 ActNor.EstInrToBdy[3]

GPS sec 1417071733 ActNor.EstTime
UTC time 12/01/2024 07:01:59 output

MPS Diff 0.734 deg

MPS Cmd Vector X -0.36018700
MPS Cmd Vector Y -0.85222700
MPS Cmd Vector Z -0.37944000

CSS Angle TLM 0.78793
CSS Sun-Pointing Angle 1.57586
  27 Nov 24 @19:00:00

CSS Angle TLM 1.62233
CSS Sun-Pointing Angle 3.24466
  01 Dec 24 @07:00:00

Pre-Burn
Thruster 1 9808 27 Nov 24 @19:00:00
Thruster 2 9552
Thruster 3 11984
Thruster 4 12240
Post-Burn
Thruster 1 10064 01 Dec 24 @07:00:00
Thruster 2 9808
Thruster 3 12272
Thruster 4 12528
Number of Pulses
Thruster 1 256
Thruster 2 256
Thruster 3 288
Thruster 4 288
Thruster Pairs
Thruster 1 & 2 512
Thruster 3 & 4 576



Timothy E.Perry
CRS IBEX OCO-2
Mission Operations
timothy.perry at ngc.com<mailto:timothy.perry at ngc.com>
Office (703) 406-5976
IBEX MOC (703)404-7470
Cell (301) 606-1430

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