[Isocops] IBEX Orbit# 586 ATS Approval (29 Oct 22 - 7 Nov 22)

Tue Oct 18 10:33:47 EDT 2022

Hi all,
I have looked at the orbit 0586 ATS file, IBEX_2022_302_o0586a_v001.scr and I approve.

The constraint violations in IBEX_2022_302_o0586a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.

The PL commands in IBEX_2022_302_o0586a_v001.scr match those in the STF, IBEX_2022_302_o0586a_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_302_o0586a_v001.oef and as verified with ibex_orbit.

There are 2 star tracker outages this orbit.  The first lasts ~53 hours and ends ~20.5 hours before the apogee sun maneuver. The second lasts ~82 hours covering the perigee sun maneuver.

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit586_Contacts.txt for all contacts (3).

No Battery Balancing this orbit.

The Inertial maneuver at perigee of orbit 0585 left us pointing in safe directions for the orbit 0586 arc A ascending and descending sequences:

ibex_rotate -o -u -0.840662,-0.493233,-0.223624 -w ibex-sun -t 2022/10:29:10:34:50
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. +213.399 Decl. -13.441 (ibex-sun)
error is     R.A.   +2.998 Decl.  +0.519
for a total  2.965 deg

ibex_rotate -o -u -0.840662,-0.493233,-0.223624 -w ibex-sun -t 2022/11:02:13:24:35
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. +217.340 Decl. -14.720 (ibex-sun)
error is     R.A.   +6.939 Decl.  +1.798
for a total  6.973 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 +217.412 -d -14.742 -w ibex-sun -t 2022/11:02:15:12:43
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.768141,-0.587543,-0.254467
which is     R.A. +217.412 Decl. -14.742
missing      R.A. +217.412 Decl. -14.742 (ibex-sun)
error is     R.A.   +0.000 Decl.  +0.000
for a total  0.001 deg

ibex_rotate -o -r +217.412 -d -14.742 -w ibex-sun -t 2022/11:02:16:42:49
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.768141,-0.587543,-0.254467
which is     R.A. +217.412 Decl. -14.742
missing      R.A. +217.473 Decl. -14.761 (ibex-sun)
error is     R.A.   +0.061 Decl.  +0.019
for a total  0.062 deg

ibex_rotate -o -r +217.412 -d -14.742 -w ibex-sun -t 2022/11:06:18:05:40
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.768141,-0.587543,-0.254467
which is     R.A. +217.412 Decl. -14.742
missing      R.A. +221.523 Decl. -16.016 (ibex-sun)
error is     R.A.   +4.111 Decl.  +1.274
for a total  4.164 deg

The Sun precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0587 apogee:

ibex_rotate -o -r +221.660 -d -16.063  -w ibex-sun -t 2022/11:06:21:12:13
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.717934,-0.638757,-0.276694
which is     R.A. +221.660 Decl. -16.063
missing      R.A. +221.660 Decl. -16.063 (ibex-sun)
error is     R.A.   +0.000 Decl.  +0.000
for a total  0.001 deg

ibex_rotate -o -r +221.660 -d -16.063 -w ibex-sun -t 2022-11-11T20:30:37
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.717934,-0.638757,-0.276694
which is     R.A. +221.660 Decl. -16.063
missing      R.A. +226.625 Decl. -17.476 (ibex-sun)
error is     R.A.   +4.965 Decl.  +1.413
for a total  4.959 deg

There is no overlap with orbit 0585 commands.

Command Approval Checklist is attached.

Carol

--
Carol Weaver
University of New Hampshire
503.902.8492

From: Wesley, Sheral R [US] (SP) <Sheral.Wesley at ngc.com>
Date: Monday, 2022-October-17 at 20:33
To: Wesley, Sheral R [US] (SP) <Sheral.Wesley at ngc.com>, Perry, Timothy E [US] (SP) <Timothy.Perry at ngc.com>, angoldconsulting <angoldconsulting at earthlink.net>, Carol Weaver <carol.weaver at unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin at ngc.com>, David Heirtzler <David.Heirtzler at unh.edu>, Kenneth Fairchild <Ken.Fairchild at unh.edu>, IBEXOPS (IBEXOPS at gmail.com) <ibexops at gmail.com>, ADS-IBEX <ads-ibex at l3harris.com>, ISOC <isocops at lists.sr.unh.edu>, Ken Fairchild <kwfairchild at gmail.com>, Paul Janzen <Paul.Janzen at mso.umt.edu>, Tyler, Ryan S [US] (SP) <Ryan.Tyler at ngc.com>, Wynn, Reese [US] (SP) <Reese.Wynn at ngc.com>
Subject: IBEX Orbit# 586 ATS Approval (29 Oct 22 - 7 Nov 22)
CAUTION: This email originated from outside of the University System. Do not click links or open attachments unless you recognize the sender and know the content is safe.

All,
Please review the following for approval.
Approvals are required before 19 Oct @ 9am

Please note the following:

  1.  Apogee Sun Maneuver
2022-11-02T14:57:43.000Z,SunMvrBegin,(mvrDuration):900,orbit:586
2022-11-02T15:12:43.000Z,SunMvrEnd,orbit:586

  1.  Perigee Sun Maneuver
2022-11-06T20:57:13.000Z,SunMvrBegin,(mvrDuration):900,orbit:586
2022-11-06T21:12:13.000Z,SunMvrEnd,orbit:586

  1.  Command Load Constraint Violation Report (CCVR)
 Input files:         1
#   IBEX_2022_302_o0586a_v001.scr

==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.

==========================
SOFT CONSTRAINT VIOLATIONS
==========================
IBX-CLC-016: No command to enable spin pulse protection was found after
             transition to science mode at 2022/11/02 16:12:49 UTC

==============
OTHER MESSAGES
==============
NO MESSAGES.

Sheral Wesley  |  Sr Principal Engineer, Satellite Systems

Northrop Grumman Corporation  |  Space Systems

O: 703-406-5641  |  C: 202-236-0802  |  sheral.wesley at ngc.com<mailto:sheral.wesley at ngc.com>

 [cid:388d9bc3-922e-452f-9e0d-353a0ba8abfe]

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