Hi all,

I have looked at the orbit 0585 ATS file, IBEX_2022_292_o0585a_v001.scr and I approve.

The constraint violations in IBEX_2022_292_o0585a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.

The PL commands in IBEX_2022_292_o0585a_v001.scr match those in the STF, IBEX_2022_292_o0585a_v002.stf.

Ascending and descending command sequences are consistent with each other, 15 Re ascending, the apogee maneuver time and 15 Re descending as determined from the OEF, IBEX_2022_292_o0585a_v001.oef and as verified with ibex_orbit.

There is 1 star tracker outage this orbit. It lasts ~39 hours and ends ~38 hours before the Apogee Sun maneuver.

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit585_Contacts.txt for all contacts (4).

Battery Balancing is 90 minutes long, more than 2 hours away from payload descending macros, and more than 15 minutes away from a maneuver.

The Inertial maneuver at perigee of orbit 0584 left us pointing in safe directions for the orbit 0585 arc A ascending and descending sequences:

ibex_rotate -o -u -0.916321,-0.363741,-0.167474 -w ibex-sun -t 2022/10:20:03:58:55

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.916321,-0.363741,-0.167474

which is R.A. +201.651 Decl. -9.641

missing R.A. +204.544 Decl. -10.226 (ibex-sun)

error is R.A. +2.893 Decl. +0.585

for a total 2.910 deg

ibex_rotate -o -u -0.916321,-0.363741,-0.167474 -w ibex-sun -t 2022/10:24:09:01:59

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.916321,-0.363741,-0.167474

which is R.A. +201.651 Decl. -9.641

missing R.A. +208.445 Decl. -11.655 (ibex-sun)

error is R.A. +6.794 Decl. +2.014

for a total 6.974 deg

The Sun precession maneuver at apogee leaves us pointing in safe directions at the time of the maneuver and for arc B ascending and descending sequences:

ibex_rotate -o -r +208.516 -d -11.680 -w ibex-sun -t 2022/10:24:10:50:07

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.860489,-0.467519,-0.202445

which is R.A. +208.516 Decl. -11.680

missing R.A. +208.516 Decl. -11.680 (ibex-sun)

error is R.A. +0.000 Decl. +0.000

for a total 0.000 deg

ibex_rotate -o -r +208.516 -d -11.680 -w ibex-sun -t 2022/10:24:12:20:13

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.860489,-0.467519,-0.202445

which is R.A. +208.516 Decl. -11.680

missing R.A. +208.575 Decl. -11.700 (ibex-sun)

error is R.A. +0.059 Decl. +0.020

for a total 0.061 deg

ibex_rotate -o -r +208.516 -d -11.680 -w ibex-sun -t 2022/10:28:14:37:28

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.860489,-0.467519,-0.202445

which is R.A. +208.516 Decl. -11.680

missing R.A. +212.563 Decl. -13.117 (ibex-sun)

error is R.A. +4.047 Decl. +1.437

for a total 4.206 deg

The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0586 apogee:

ibex_rotate -o -u -0.840662,-0.493233,-0.223624 -w ibex-sun -t 2022/10:28:17:47:45

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.840662,-0.493233,-0.223624

which is R.A. +210.401 Decl. -12.922

missing R.A. +212.698 Decl. -13.170 (ibex-sun)

error is R.A. +2.297 Decl. +0.248

for a total 2.251 deg

ibex_rotate -o -u -0.840662,-0.493233,-0.223624 -w ibex-sun -t 2022-11-02T14:57:40

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.840662,-0.493233,-0.223624

which is R.A. +210.401 Decl. -12.922

missing R.A. +217.402 Decl. -14.739 (ibex-sun)

error is R.A. +7.001 Decl. +1.817

for a total 7.036 deg

There is no overlap with orbit 0584 commands.

Command Approval Checklist is attached.

Carol

Carol Weaver

University of New Hampshire

503.902.8492

From: Wesley, Sheral R [US] (SP) <Sheral.Wesley@ngc.com>
Date: Thursday, 2022-October-6 at 19:28
To: Perry, Timothy E [US] (SP) <Timothy.Perry@ngc.com>, angoldconsulting <angoldconsulting@earthlink.net>, Carol Weaver <carol.weaver@unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin@ngc.com>, David Heirtzler <David.Heirtzler@unh.edu>, Kenneth Fairchild <Ken.Fairchild@unh.edu>, IBEXOPS (IBEXOPS@gmail.com) <ibexops@gmail.com>, ADS-IBEX <ads-ibex@l3harris.com>, ISOC <isocops@lists.sr.unh.edu>, Ken Fairchild <kwfairchild@gmail.com>, Paul Janzen <Paul.Janzen@mso.umt.edu>, Tyler, Ryan S [US] (SP) <Ryan.Tyler@ngc.com>, Wesley, Sheral R [US] (SP) <Sheral.Wesley@ngc.com>, Wynn, Reese [US] (SP) <Reese.Wynn@ngc.com>
Subject: IBEX Orbit# 585 ATS Approval (19 Oct 22 - 29 Oct 22)

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All,

Please review the following for approval.

Approvals are due by COB 9 Oct 22

Apogee Sun Maneuver

2022-10-24T10:35:07.000Z,SunMvrBegin,(mvrDuration):900,orbit:585
2022-10-24T10:50:07.000Z,SunMvrEnd,orbit:585

Sheral Wesley | Sr Principal Engineer, Satellite Systems

Northrop Grumman Corporation | Space Systems

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