[Isocops] IBEX Orbit #533 ATS Approval (04 – 13 July, 2021)
Carol Weaver
Carol.Weaver at unh.edu
Wed Jun 23 14:52:19 EDT 2021
Hi all,
I have looked at the orbit 0533 ATS file, IBEX_2021_185_o0533a_v001.scr and I approve.
The constraint violations in IBEX_2021_185_o0533a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2021_185_o0533a_v001.scr match those in the STF, IBEX_2021_185_o0533a_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_2021_185_o0533a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins after the perigee maneuver and lasts for ~8 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit533_Contacts.txt for all contacts (3).
Battery Balancing is 90 minutes long and appropriately placed from instrument commands and maneuvers.
The Inertial maneuver at perigee of orbit 0532 left us pointing in safe directions for the orbit 0533 arc A ascending and descending sequences:
ibex_rotate -o -u -0.170334,0.907633,0.383651 -w ibex-sun -t 2021/07:04:12:11:06
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.170334,+0.907633,+0.383651
which is R.A. +100.629 Decl. +22.560
missing R.A. +103.504 Decl. +22.836 (ibex-sun)
error is R.A. +2.875 Decl. +0.276
for a total 2.667 deg
ibex_rotate -o -u -0.170334,0.907633,0.383651 -w ibex-sun -t 2021/07:08:05:51:29
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.170334,+0.907633,+0.383651
which is R.A. +100.629 Decl. +22.560
missing R.A. +107.323 Decl. +22.488 (ibex-sun)
error is R.A. +6.694 Decl. +0.072
for a total 6.183 deg
The inertial 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 -u -0.243985,0.893698,0.376531 -w ibex-sun -t 2021/07:08:07:34:37
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.243985,+0.893698,+0.376531
which is R.A. +105.270 Decl. +22.119
missing R.A. +107.398 Decl. +22.481 (ibex-sun)
error is R.A. +2.128 Decl. +0.362
for a total 2.001 deg
ibex_rotate -o -u -0.243985,0.893698,0.376531 -w ibex-sun -t 2021/07:08:09:09:43
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.243985,+0.893698,+0.376531
which is R.A. +105.270 Decl. +22.119
missing R.A. +107.467 Decl. +22.474 (ibex-sun)
error is R.A. +2.197 Decl. +0.355
for a total 2.063 deg
ibex_rotate -o -u -0.243985,0.893698,0.376531 -w ibex-sun -t 2021/07:12:22:55:34
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.243985,+0.893698,+0.376531
which is R.A. +105.270 Decl. +22.119
missing R.A. +112.215 Decl. +21.880 (ibex-sun)
error is R.A. +6.945 Decl. +0.239
for a total 6.443 deg
The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0534 apogee:
ibex_rotate -o -u -0.319271,0.873015,0.368660 -w ibex-sun -t 2021/07:13:02:20:50
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.319271,+0.873015,+0.368660
which is R.A. +110.088 Decl. +21.633
missing R.A. +112.352 Decl. +21.855 (ibex-sun)
error is R.A. +2.264 Decl. +0.222
for a total 2.115 deg
ibex_rotate -o -u -0.319271,0.873015,0.368660 -w ibex-sun -t 2021-07-17T21:08:51
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.319271,+0.873015,+0.368660
which is R.A. +110.088 Decl. +21.633
missing R.A. +117.109 Decl. +21.114 (ibex-sun)
error is R.A. +7.021 Decl. +0.519
for a total 6.558 deg
There is no overlap with orbit 0532 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503.902.8492
From: Perry, Timothy E [US] (SP) <Timothy.Perry at ngc.com>
Date: Tuesday, 2021-June-22 at 17:19
To: Bobbett, James E [US] (SP) <James.Bobbett at ngc.com>, bhautama at gmail.com <bhautama at gmail.com>, Carol Weaver <Carol.Weaver at unh.edu>, Cavallo, John A [US] (SP) <John.Cavallo at ngc.com>, Chubin, Eric [US] (SP) <Eric.Chubin at ngc.com>, Fleming, Ed [US] (SP) <Ed.Fleming at ngc.com>, ADS-IBEX at l3harris.com <ADS-IBEX at l3harris.com>, ibexops at gmail.com <ibexops at gmail.com>, ibexops at gmail.com <ibexops at gmail.com>, isocops at lists.sr.unh.edu <isocops at lists.sr.unh.edu>, fair-play at comcast.net <fair-play at comcast.net>, kwfairchild at gmail.com <kwfairchild at gmail.com>, Kenneth Fairchild <Ken.Fairchild at unh.edu>, Leonard, Benjamin Y [US] (SP) <Benjamin.Leonard at ngc.com>, angoldconsulting at earthlink.net <angoldconsulting at earthlink.net>, nangold at princeton.edu <nangold at princeton.edu>, Perry, Timothy E [US] (SP) <Timothy.Perry at ngc.com>, 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>, ezirnstein at swri.edu <ezirnstein at swri.edu>
Subject: IBEX Orbit #533 ATS Approval (04 – 13 July, 2021)
Caution - External Email
All,
Attached are the planning files for Orbit #533. Please respond to this thread with comments and approvals.
Approvals are required by COB on 23 June 2021
Please note the following:
1. Battery Balancing this orbit
Begin 2021/07:13:08:00:00– End 2021/07:13:09:30:00
1. The OEF is larger than normal. I was running into issues generating the OEF file. I had to go a couple orbits back for MPS to generate the file.
1. Command Load Constraint Violation Report (CCVR)
IBEX_2021_185_o0533a_v001.ccvr
# Input files: 1
# IBEX_2021_185_o0533a_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 2021/07/04 09:34:00 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2021/07/08 08:39:43 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Timothy E.Perry
CRS IBEX OCO-2
Mission Operations
timothy.perry at ngc.com
Office (703) 406-5976
Cell (301) 606-1430
[cid:image001.png at 01D7683F.5B3A1340]
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