[Isocops] IBEX Orbit #670 ATS Approval (December 01 - 10, 2024)
Carol Weaver
Carol.Weaver at unh.edu
Fri Nov 22 10:15:59 EST 2024
Hi all,
The angle at descending after the apogee sun maneuver is 3.996 deg.
I have looked at the orbit 0670 ATS file, IBEX_2024_336_o0670a_v001.scr and I approve.
The constraint violations in IBEX_2024_336_o0670a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2024_336_o0670a_v001.scr match those in the STF, IBEX_2024_336_o0670a_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_2024_336_o0670a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2024-12-04 06:16:27 and lasts for 107.7 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit670_Contacts.txt for all contacts (3).
Battery Balancing is 90 minutes long, more than 2 hours away from payload descending macros, 10.816 hrs, and more than 15 minutes away from a maneuver, 534 mins.
The Inertial maneuver at perigee of orbit 0669 left us pointing in safe directions for the orbit 0670 arc A ascending and descending sequences:
ibex_rotate -o -u -0.360187,-0.852227,-0.37944 -w ibex-sun -t 2024/12:02:01:48:56
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.360187,-0.852227,-0.379440
which is R.A. +247.089 Decl. -22.299
missing R.A. +248.429 Decl. -21.971 (ibex-sun)
error is R.A. +1.340 Decl. +0.328
for a total 1.284 deg
ibex_rotate -o -u -0.360187,-0.852227,-0.37944 -w ibex-sun -t 2024/12:06:00:25:59
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.360187,-0.852227,-0.379440
which is R.A. +247.089 Decl. -22.299
missing R.A. +252.716 Decl. -22.459 (ibex-sun)
error is R.A. +5.627 Decl. +0.160
for a total 5.205 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 +252.796 -d -22.467 -w ibex-sun -t 2024/12:06:02:14:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.273325,-0.882753,-0.382151
which is R.A. +252.796 Decl. -22.467
missing R.A. +252.796 Decl. -22.467 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +252.796 -d -22.467 -w ibex-sun -t 2024/12:06:03:44:13
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.273325,-0.882753,-0.382151
which is R.A. +252.796 Decl. -22.467
missing R.A. +252.864 Decl. -22.474 (ibex-sun)
error is R.A. +0.068 Decl. +0.007
for a total 0.063 deg
ibex_rotate -o -r +252.796 -d -22.467 -w ibex-sun -t 2024/12:10:02:11:02
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.273325,-0.882753,-0.382151
which is R.A. +252.796 Decl. -22.467
missing R.A. +257.103 Decl. -22.888 (ibex-sun)
error is R.A. +4.307 Decl. +0.421
for a total 3.996 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0671 apogee:
ibex_rotate -o -u -0.176393,-0.899168,-0.400477 -w ibex-sun -t 2024/12:10:04:05:33
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.176393,-0.899168,-0.400477
which is R.A. +258.901 Decl. -23.608
missing R.A. +257.192 Decl. -22.898 (ibex-sun)
error is R.A. +1.709 Decl. +0.710
for a total 1.724 deg
ibex_rotate -o -u -0.176393,-0.899168,-0.400477 -w ibex-sun -t 2024-12-15T03:51:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.176393,-0.899168,-0.400477
which is R.A. +258.901 Decl. -23.608
missing R.A. +262.780 Decl. -23.242 (ibex-sun)
error is R.A. +3.879 Decl. +0.366
for a total 3.578 deg
There is no overlap with orbit 0669 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503-902-8492
From: NIgel Angold <nangold at princeton.edu>
Date: Friday, November 22, 2024 at 01:22
To: Perry, Timothy E [US] (SP) <Timothy.Perry at ngc.com>
Cc: Carol Weaver <carol.weaver at unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin at ngc.com>, Coca Gonzales, Andrea [US] (SP) <Andrea.CocaGonzales at ngc.com>, David Heirtzler <David.Heirtzler at unh.edu>, ADS-IBEX at l3harris.com <ADS-IBEX at l3harris.com>, ibexops <IBEXOPS at gmail.com>, isocops <isocops at lists.sr.unh.edu>, kwfairchild <kwfairchild at gmail.com>, Kenneth Fairchild <Ken.Fairchild at unh.edu>, 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: Re: IBEX Orbit #670 ATS Approval (December 01 - 10, 2024)
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.
I approve IBEX_2024_336_o0670a_v001.scr
Nigel
Perry, Timothy E [US] (SP)<mailto:Timothy.Perry at ngc.com>
November 17, 2024 at 17:58
All,
Attached are the planning files for Orbit #670. Please respond to this thread with comments and approvals. Approvals for the Orbit 670 ATS are required by COB, 21 November 2024.
Please note the following:
Battery Balancing
Eclipse Flag True: 2024/12/10 13:00:00
Eclipse Flag False: 2024/12/10 14:30:00
Command Load Constraint Violation Report (CCVR)
IBEX_2024_336_o0670a_v001.ccvr
# Input files: 1
# IBEX_2024_336_o0670a_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 2024/12/02 00:37:40 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2024/12/06 03:14:13 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
IBEX MOC (703)404-7470
Cell (301) 606-1430
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