[Isocops] IBEX Orbit #612 ATS Approval (22 June – 02 July 2023)
Carol Weaver
Carol.Weaver at unh.edu
Mon Jun 12 11:03:53 EDT 2023
Hi all,
I have looked at the orbit 0612 ATS file, IBEX_2023_173_o0612a_v001.scr and I approve.
The constraint violations in IBEX_2023_173_o0612a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_173_o0612a_v001.scr match those in the STF, IBEX_2023_173_o0612a_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_2023_173_o0612a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit ~9 hours after the perigee maneuver and lasting ~9 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit612_Contacts.txt for all contacts (2).
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 0611 left us pointing in safe directions for the orbit 0612 arc A ascending and descending sequences:
ibex_rotate -o -u 0.030138,0.920624,0.389285 -w ibex-sun -t 2023/06:22:23:34:11
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.030138,+0.920624,+0.389285
which is R.A. +88.125 Decl. +22.910
missing R.A. +91.039 Decl. +23.413 (ibex-sun)
error is R.A. +2.914 Decl. +0.503
for a total 2.726 deg
ibex_rotate -o -u 0.030138,0.920624,0.389285 -w ibex-sun -t 2023/06:26:15:29:28
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.030138,+0.920624,+0.389285
which is R.A. +88.125 Decl. +22.910
missing R.A. +94.808 Decl. +23.373 (ibex-sun)
error is R.A. +6.683 Decl. +0.463
for a total 6.162 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 -0.044905,0.920464,0.388239 -w ibex-sun -t 2023/06:26:17:12:36
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.044905,+0.920464,+0.388239
which is R.A. +92.793 Decl. +22.845
missing R.A. +94.883 Decl. +23.372 (ibex-sun)
error is R.A. +2.091 Decl. +0.527
for a total 1.994 deg
ibex_rotate -o -u -0.044905,0.920464,0.388239 -w ibex-sun -t 2023/06:26:18:47:42
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.044905,+0.920464,+0.388239
which is R.A. +92.793 Decl. +22.845
missing R.A. +94.953 Decl. +23.371 (ibex-sun)
error is R.A. +2.160 Decl. +0.526
for a total 2.055 deg
ibex_rotate -o -u -0.044905,0.920464,0.388239 -w ibex-sun -t 2023/07:01:05:43:33
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.044905,+0.920464,+0.388239
which is R.A. +92.793 Decl. +22.845
missing R.A. +99.671 Decl. +23.154 (ibex-sun)
error is R.A. +6.878 Decl. +0.309
for a total 6.338 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0613 apogee:
ibex_rotate -o -u -0.122107,0.914177,0.386486 -w ibex-sun -t 2023/07:01:08:26:59
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.122107,+0.914176,+0.386486
which is R.A. +97.608 Decl. +22.736
missing R.A. +99.786 Decl. +23.143 (ibex-sun)
error is R.A. +2.178 Decl. +0.407
for a total 2.046 deg
ibex_rotate -o -u -0.122107,0.914177,0.386486 -w ibex-sun -t 2023-07-06T05:59:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.122107,+0.914176,+0.386486
which is R.A. +97.608 Decl. +22.736
missing R.A. +104.731 Decl. +22.762 (ibex-sun)
error is R.A. +7.123 Decl. +0.026
for a total 6.569 deg
There is no overlap with orbit 0611 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: Thursday, June 8, 2023 at 11:17
To: Carol Weaver <carol.weaver at unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin at ngc.com>, David Heirtzler <David.Heirtzler at unh.edu>, ADS-IBEX at l3harris.com <ADS-IBEX at l3harris.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>, angoldconsulting <angoldconsulting at earthlink.net>, Paul.Janzen at mso.umt.edu <Paul.Janzen at mso.umt.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>
Subject: IBEX Orbit #612 ATS Approval (22 June – 02 July 2023)
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,
Attached are the planning files for Orbit #612. Please respond to this thread with comments and approvals. Approvals are required by COB, 11 June 2023
Please note the following:
1. Battery Balancing this Orbit.
Begin 2023/07/01 16:00:00– End 2023/07/01 17:30:00
2. Command Load Constraint Violation Report (CCVR)
IBEX_2023_173_o0612a_v001.ccvr
# Input files: 1
# IBEX_2023_173_o0612a_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 2023/06/22 21:35:43 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/06/26 18:17:42 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Timothy E.Perry
CRS IBEX OCO-2
Mission Operations
timothy.perry at ngc.com<mailto:timothy.perry at ngc.com>
Office (703) 406-5976
Cell (301) 606-1430
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