[Isocops] IBEX Orbit #609 ATS Approval (26 May – 04 June 2023)
Carol Weaver
Carol.Weaver at unh.edu
Mon May 15 16:52:41 EDT 2023
Hi all,
I have looked at the orbit 0609 ATS file, IBEX_2023_145_o0609a_v001.scr and I approve.
The constraint violations in IBEX_2023_145_609a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_145_o0609a_v001.scr match those in the STF, IBEX_2023_145_o0609a_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_145_o0609a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit609_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 Inertial maneuver at perigee of orbit 0608 left us pointing in safe directions for the orbit 0609 arc A ascending and descending sequences:
ibex_rotate -o -u 0.474042,0.811388,0.341955 -w ibex-sun -t 2023/05:26:04:37:14
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.474042,+0.811388,+0.341955
which is R.A. +59.705 Decl. +19.996
missing R.A. +62.386 Decl. +20.992 (ibex-sun)
error is R.A. +2.681 Decl. +0.996
for a total 2.701 deg
ibex_rotate -o -u 0.474042,0.811388,0.341955 -w ibex-sun -t 2023/05:29:21:20:45
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.474042,+0.811388,+0.341955
which is R.A. +59.705 Decl. +19.996
missing R.A. +66.151 Decl. +21.636 (ibex-sun)
error is R.A. +6.446 Decl. +1.640
for a total 6.244 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 0.405835,0.842434,0.354405 -w ibex-sun -t 2023/05:29:23:03:53
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.405835,+0.842434,+0.354405
which is R.A. +64.278 Decl. +20.757
missing R.A. +66.225 Decl. +21.648 (ibex-sun)
error is R.A. +1.947 Decl. +0.892
for a total 2.022 deg
ibex_rotate -o -u 0.405835,0.842434,0.354405 -w ibex-sun -t 2023/05:30:00:38:59
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.405835,+0.842434,+0.354405
which is R.A. +64.278 Decl. +20.757
missing R.A. +66.293 Decl. +21.660 (ibex-sun)
error is R.A. +2.015 Decl. +0.903
for a total 2.085 deg
ibex_rotate -o -u 0.405835,0.842434,0.354405 -w ibex-sun -t 2023/06:03:12:13:11
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.405835,+0.842434,+0.354405
which is R.A. +64.278 Decl. +20.757
missing R.A. +70.922 Decl. +22.294 (ibex-sun)
error is R.A. +6.644 Decl. +1.537
for a total 6.368 deg
The Sun precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0610 apogee:
ibex_rotate -o -r +71.036 -d +22.303 -w ibex-sun -t 2023/06:03:15:00:06
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.300663,+0.874973,+0.379505
which is R.A. +71.036 Decl. +22.303
missing R.A. +71.036 Decl. +22.303 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +71.036 -d +22.303 -w ibex-sun -t 2023-06-08T13:34:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.300663,+0.874973,+0.379505
which is R.A. +71.036 Decl. +22.303
missing R.A. +76.071 Decl. +22.834 (ibex-sun)
error is R.A. +5.035 Decl. +0.531
for a total 4.680 deg
There is no overlap with orbit 0608 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: Friday, May 12, 2023 at 12:57
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 #609 ATS Approval (26 May – 04 June 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 #609. Please respond to this thread with comments and approvals. Approvals are required by COB, 15 May 2023
Please note the following:
1. Battery Balancing this Orbit
Begin 06/04/2023 03:00:00 – End 06/04/2023 04:30:00
2. Command Load Constraint Violation Report (CCVR)
IBEX_2023_145_609a_v001.ccvr
# Input files: 1
# IBEX_2023_145_o0609a_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 2023/05/26 02:37:24 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/05/30 00:08:59 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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