All,

The perigee contacts for Orbit# 490  were nominal for command and telemetry.

The Master_Timer command was executed, and the inertial maneuver successful.

Please the following:

1. Set_downlink (320k)

2. SSR_Dump (reset pointers)

3. CAR# 2002 Upload Orbit# 493 BUS/INST ATS

IBEX_2020_185_o0493a_BUS_v001.scr (173-223)

IBEX_2020_185_o0493a_INST_v001.scr (270-315)

4. CAR# 1099 Orbit# 491 Hi Background Test

Mode_HVENG

Mode_HVSTANDBY

Sweep Table Upload_160922 (table_hi_023456_background, quit)

Mode_HVENG

Mode_HVSCI

-0.32969400        ActNor.EstInrToBdy[0]

-0.44081200        ActNor.EstInrToBdy[1]

-0.73710400        ActNor.EstInrToBdy[2]

0.39200000          ActNor.EstInrToBdy[3]

1276302726         ActNor.EstTime

J2000     Spin Axis             

ECI X      0.140441             

ECI Y      0.908329             

ECI Z      0.393973             

Precession Maneuver                   

MPS Diff              0.686     deg

*MPS Diff should be < 1.5           

Right Ascension - RA       81.211   deg

Declination - DEC              23.202   deg

IBEX Spin Axis vs. Sun Vector                     

IBEX Sun Angle  -3.429    deg

MPS Cmd Vector X          0.132901000

MPS Cmd Vector Y          0.912901000

MPS Cmd Vector Z          0.385938000

CSS Angle TLM  0.744936             

CSS Sun-Pointing Angle 1.489872             

                                10 June 20 @15:00

CSS Angle TLM  0.683569             

CSS Sun-Pointing Angle 1.367138             

                                15 June 20 @ 23:30

Pre-Burn                            

Thruster 1           10800    10 June 20 @15:00

Thruster 2           10496   

Thruster 3           13488   

Thruster 4           13792   

Post-Burn                           

Thruster 1           11072    15 June 20 @ 23:30

Thruster 2           10768   

Thruster 3           13776   

Thruster 4           14080   

Number of Pulses                           

Thruster 1           272        

Thruster 2           272        

Thruster 3           288        

Thruster 4           288        

Thruster Pairs                   

Thruster 1 & 2    544        

Thruster 3 & 4    576        

Sheral Wesley  | Principal Engineer, Satellite Systems

Northrop Grumman Corporation  |  Space Systems

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