Tim and Sheral,

Many thanks for going above and beyond these past two orbits to ensure the spacecraft was healthy after the Alaska contacts failed. The personal sacrifices you continue to make for this mission - day, night, weekends or holidays - are much appreciated.

I'm sure SSC is looking into why the AK contacts failed but I'll follow up with them. I see you've already extended contacts next perigee to downlink the orbit 585 SSR data which we didn't get this orbit. And you've switched the AK contact to HI01 - good idea.

Thank you, thank you, thank you and Go IBEX!
Nigel
Wesley, Sheral R [US] (SP)
October 29, 2022 at 05:22

All,

    The first perigee contact for Orbit# 585 was nominal and the inertial maneuver was successful. 

    The SSR_Dump  contact with USAK01 was a failure. At AOS, we did not see downlink and tried to command to a lower downlink data rate with no success.

We then tried to blind acq the spacecraft @160k with no success and tried again to command the downlink to 2k & to 40k with no success.

The contact was ended early and a scheduled Blind_Acq contact with HAW01 @1045z was successful to monitor the health of the spacecraft. 

 

Tasks Accomplished:

CAR # 1275  Orbit 587 ATS Upload

   IBEX_2022_311_o0587a_v001 93 cmds

Dump Backorbit data

Reset FDC totals

Reset 18 Day Timer

Blind_acq.scr

Results from the Inertial Maneuver:

Q1          -0.56096800        ActNor.EstInrToBdy[0]

Q2          -0.53963000        ActNor.EstInrToBdy[1]

Q3          0.61039700          ActNor.EstInrToBdy[2]

Q4          0.14673100          ActNor.EstInrToBdy[3]

GPS sec                1351020724         ActNor.EstTime

UTC time             10/28/2022 19:31:50        output

 

MPS Diff  0.699  deg

 

MPS Cmd Vector X          -0.840662000

MPS Cmd Vector Y          -0.493233000

MPS Cmd Vector Z          -0.223624000

 

CSS Angle TLM  0.358274             

CSS Sun-Pointing Angle 0.716548             

                                27 Oct 22 @02:30:00

CSS Angle TLM  0.218503             

CSS Sun-Pointing Angle 0.437006             

                                28 Oct 22 @18:32:00

Pre-Burn                            

Thruster 1           7936       27 Oct 22 @02:30:00

Thruster 2           7696      

Thruster 3           10096   

Thruster 4           10336   

Post-Burn                           

Thruster 1           8064       28 Oct 22 @18:32:00

Thruster 2           7824      

Thruster 3           10224   

Thruster 4           10464   

Number of Pulses                           

Thruster 1           128        

Thruster 2           128        

Thruster 3           128        

Thruster 4           128        

Thruster Pairs                   

Thruster 1 & 2    256        

Thruster 3 & 4    256        



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