All,

The perigee contacts were nominal for command and tlm. The inertial maneuver was successful.

The SSR was dumped via APL.

The following objectives were accomplished:

1. CAR# 1174 Upload Orbit# 531 ATS

IBEX_2021_166_o0531a_v001.scr (758 – 845)

2. DumpBackorbit (from start,0,0,0,0)pre-maneuver

3. Reset_master_timer

4. Set_Downlink (40k)

5. DumpBackorbit (from start,0,0,0,0) post maneuver

Results from the Inertial Maneuver:

Q1          -0.19378000        ActNor.EstInrToBdy[0]

Q2          -0.52086800        ActNor.EstInrToBdy[1]

Q3          -0.83083200        ActNor.EstInrToBdy[2]

Q4          0.02937150          ActNor.EstInrToBdy[3]

GPS sec                1307061133         ActNor.EstTime

UTC time             06/07/2021 00:31:59        output

MPS Cmd Vector X          0.283804000

MPS Cmd Vector Y          0.883311000

MPS Cmd Vector Z          0.373117000

MPS Diff              0.777     deg

*MPS Diff should be < 1.5*        

CSS Angle TLM  0.209357             

CSS Sun-Pointing Angle 0.418714             

                                01 June 21 @ 14:00:00

CSS Angle TLM  0.362077             

CSS Sun-Pointing Angle 0.724154             

                                07 June 21 @ 00:30:00

Pre-Burn                            

Thruster 1           2224       01 June 21 @ 14:00:00

Thruster 2           2192      

Thruster 3           2368      

Thruster 4           2400      

Post-Burn                           

Thruster 1           2512       07 June 21 @ 00:30:00

Thruster 2           2480      

Thruster 3           2672      

Thruster 4           2704      

Number of Pulses                           

Thruster 1           288        

Thruster 2           288        

Thruster 3           304        

Thruster 4           304        

Thruster Pairs                   

Thruster 1 & 2    576        

Thruster 3 & 4    608        

Sheral Wesley  | Sr Principal Engineer, Satellite Systems

Northrop Grumman Corporation  |  Space Systems

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