[Isocops] IBEX Orbit# 584 ATS Approval (10 Oct - 19 Oct 22)

Wed Sep 28 10:30:34 EDT 2022

Hi all,
I have looked at the orbit 0584 ATS file, IBEX_2022_283_o0584a_v001.scr and I approve.

The constraint violations in IBEX_2022_283_o0584a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.

The PL commands in IBEX_2022_283_o0584a_v001.scr match those in the STF, IBEX_2022_283_o0584a_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_283_o0584a_v001.oef and as verified with ibex_orbit.

There is 1 star tracker outage this orbit. It is the ~8 day outage that started in 0583 and ends ~51 hours before the apogee maneuver.

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit584_Contacts.txt for all contacts (3).

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 Sun maneuver at perigee of orbit 0583 left us pointing in safe directions for the orbit 0584 arc A ascending and descending sequences:

ibex_rotate -o -r +195.253 -d -6.500 -w ibex-sun -t 2022/10:10:17:37:02
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.958572,-0.261391,-0.113203
which is     R.A. +195.253 Decl.  -6.500
missing      R.A. +195.776 Decl.  -6.740 (ibex-sun)
error is     R.A.   +0.523 Decl.  +0.240
for a total  0.572 deg

ibex_rotate -o -r +195.253 -d -6.500 -w ibex-sun -t 2022/10:15:00:44:06
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.958572,-0.261391,-0.113203
which is     R.A. +195.253 Decl.  -6.500
missing      R.A. +199.646 Decl.  -8.280 (ibex-sun)
error is     R.A.   +4.393 Decl.  +1.780
for a total  4.707 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 +199.716 -d  -8.307 -w ibex-sun -t 2022/10:15:02:32:14
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.931500,-0.333819,-0.144477
which is     R.A. +199.716 Decl.  -8.307
missing      R.A. +199.716 Decl.  -8.307 (ibex-sun)
error is     R.A.   +0.000 Decl.  +0.000
for a total  0.000 deg

ibex_rotate -o -r +199.716 -d  -8.307 -w ibex-sun -t 2022/10:15:04:02:20
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.931500,-0.333819,-0.144477
which is     R.A. +199.716 Decl.  -8.307
missing      R.A. +199.773 Decl.  -8.329 (ibex-sun)
error is     R.A.   +0.057 Decl.  +0.022
for a total  0.061 deg

ibex_rotate -o -r +199.716 -d  -8.307 -w ibex-sun -t 2022/10:19:10:11:22
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.931500,-0.333819,-0.144477
which is     R.A. +199.716 Decl.  -8.307
missing      R.A. +203.826 Decl.  -9.919 (ibex-sun)
error is     R.A.   +4.110 Decl.  +1.612
for a total  4.367 deg

The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0585 apogee:

ibex_rotate -o -u -0.916321,-0.363741,-0.167474 -w ibex-sun -t 2022/10:19:13:59:40
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. +203.983 Decl.  -9.986 (ibex-sun)
error is     R.A.   +2.332 Decl.  +0.345
for a total  2.323 deg

ibex_rotate -o -u -0.916321,-0.363741,-0.167474 -w ibex-sun -t 2022-10-24T10:37:03
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. +208.508 Decl. -11.677 (ibex-sun)
error is     R.A.   +6.857 Decl.  +2.036
for a total  7.039 deg

There is no overlap with orbit 0583 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: Tuesday, 2022-September-27 at 17:23
To: 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>, Wesley, Sheral R [US] (SP) <Sheral.Wesley at ngc.com>, Wynn, Reese [US] (SP) <Reese.Wynn at ngc.com>
Subject: IBEX Orbit# 584 ATS Approval (10 Oct - 19 Oct 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 due by COB 29 Sept 22

  1.  Apogee Sun Maneuver
2022-10-15T02:17:14.000Z,SunMvrBegin
2022-10-15T02:32:14.000Z,SunMvrEnd,orbit:584

  1.  Command Load Constraint Violation Report (CCVR)
# Input files:         1
#   IBEX_2022_283_o0584a_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 2022/10/10 14:23:39 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
             transition to science mode at 2022/10/15 03:32:20 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:d320f7ed-82cd-4b6f-b2f6-2b921719d75d]

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20220928/94a11cce/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Outlook-ycru5uro.png
Type: image/png
Size: 2023 bytes
Desc: Outlook-ycru5uro.png
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20220928/94a11cce/Outlook-ycru5uro-0001.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev16h_0584_CEW.docx
Type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
Size: 47775 bytes
Desc: IBEX-Command-Approval-Checklist-Rev16h_0584_CEW.docx
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20220928/94a11cce/IBEX-Command-Approval-Checklist-Rev16h_0584_CEW-0001.docx>