All,

The perigee contacts were nominal for command, but had intermittent telemetry during the 1^st SSR data dump @0200z and had to decrease the telemetry rate to 160k. The 2nd contact was changed from HAW01 to AK01 @320k and extended in order to redump the SSR data from orbit# 668.

Objectives during the contacts

Reset master timer
CAR# 1426 Upload Orbit# 669 IBEX-Lo Gain test (23 Nov 23)

IBEX_2024_327_o0669a_v001-lgc (573-627)

CAR# 1425 Upload Orbit 669

IBEX_2024_327_o0669a_v001 (628-725)

CAR# 1430 Re-Dump Orbit# 668

ssr_dump NBLOCKS (Start 96870 Numblks 95860)

Results from the PERIGEE maneuver

Q1 -0.18792700 ActNor.EstInrToBdy[0]

Q2 -0.79515800 ActNor.EstInrToBdy[1]

Q3 0.53679500 ActNor.EstInrToBdy[2]

Q4 0.21037800 ActNor.EstInrToBdy[3]

GPS sec 1416281509 ActNor.EstTime

UTC time 11/22/2024 03:31:35 output

MPS Diff 0.588 deg

*MPS Diff should be < 1.5

MPS Cmd Vector X -0.53291600

MPS Cmd Vector Y -0.77276500

MPS Cmd Vector Z -0.34472500

CSS Angle TLM 1.873

CSS Sun-Pointing Angle 3.746

17 Nov 24 @21:00:00

CSS Angle TLM 0.502411

CSS Sun-Pointing Angle 1.004822

22 Nov 24 @02:30:00

Pre-Burn

Thruster 1 9312 17 Nov 24 @21:00:00

Thruster 2 9056

Thruster 3 11296

Thruster 4 11552

Post-Burn

Thruster 1 9456 22 Nov 24 @02:30:00

Thruster 2 9200

Thruster 3 11456

Thruster 4 11712

Number of Pulses

Thruster 1 144

Thruster 2 144

Thruster 3 160

Thruster 4 160

Thruster Pairs

Thruster 1 & 2 288

Thruster 3 & 4 320

Best Regards,

Sheral Wesley | Sr Principal Engineer, Satellite Systems

Northrop Grumman Corporation | Space Systems

O: 703-406-5641 | C: 202-236-0802 | sheral.wesley@ngc.com