[Isocops] IBEX Orbit #648 ATS Approval (May 15 – 24, 2024)
Carol Weaver
Carol.Weaver at unh.edu
Fri May 3 23:40:43 EDT 2024
Hi all,
I have looked at the orbit 0648 ATS file, IBEX_2024_136_o0648a_v001.scr and I approve.
The constraint violations in IBEX_2024_136_o0648a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2024_136_o0648a_v001.scr match those in the STF, IBEX_2024_136_o0648a_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_136_o0648a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2024-05-23 01:06:54 and lasts for 27.0 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit648_Contacts.txt for all contacts (3).
Battery Balancing is 90 minutes long, more than 2 hours away from payload descending macros, 11.742 hrs, and more than 15 minutes away from a maneuver, -452 mins.
The Inertial maneuver at perigee of orbit 0647 left us pointing in safe directions for the orbit 0648 arc A ascending and descending sequences:
ibex_rotate -o -u 0.614591,0.727296,0.305479 -w ibex-sun -t 2024/05:15:12:07:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.614591,+0.727296,+0.305479
which is R.A. +49.801 Decl. +17.787
missing R.A. +52.433 Decl. +18.943 (ibex-sun)
error is R.A. +2.632 Decl. +1.156
for a total 2.752 deg
ibex_rotate -o -u 0.614591,0.727296,0.305479 -w ibex-sun -t 2024/05:19:00:39:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.614591,+0.727296,+0.305479
which is R.A. +49.801 Decl. +17.787
missing R.A. +55.949 Decl. +19.772 (ibex-sun)
error is R.A. +6.148 Decl. +1.985
for a total 6.149 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 0.554399,0.767422,0.322034 -w ibex-sun -t 2024/05:19:02:22:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.554399,+0.767422,+0.322034
which is R.A. +54.155 Decl. +18.786
missing R.A. +56.022 Decl. +19.788 (ibex-sun)
error is R.A. +1.867 Decl. +1.002
for a total 2.027 deg
ibex_rotate -o -u 0.554399,0.767422,0.322034 -w ibex-sun -t 2024/05:19:03:57:29
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.554399,+0.767422,+0.322034
which is R.A. +54.155 Decl. +18.786
missing R.A. +56.089 Decl. +19.803 (ibex-sun)
error is R.A. +1.934 Decl. +1.017
for a total 2.089 deg
ibex_rotate -o -u 0.554399,0.767422,0.322034 -w ibex-sun -t 2024/05:23:11:15:27
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.554399,+0.767422,+0.322034
which is R.A. +54.155 Decl. +18.786
missing R.A. +60.442 Decl. +20.679 (ibex-sun)
error is R.A. +6.287 Decl. +1.893
for a total 6.213 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0649 apogee:
ibex_rotate -o -u 0.489499,0.803598,0.338557 -w ibex-sun -t 2024/05:24:06:32:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.489499,+0.803598,+0.338557
which is R.A. +58.653 Decl. +19.789
missing R.A. +61.198 Decl. +20.784 (ibex-sun)
error is R.A. +2.545 Decl. +0.995
for a total 2.586 deg
ibex_rotate -o -u 0.489499,0.803598,0.338557 -w ibex-sun -t 2024-05-28T09:47:53
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.489499,+0.803598,+0.338557
which is R.A. +58.653 Decl. +19.789
missing R.A. +65.390 Decl. +21.531 (ibex-sun)
error is R.A. +6.737 Decl. +1.742
for a total 6.539 deg
There is no overlap with orbit 0647 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, May 2, 2024 at 15:00
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>, kwfairchild at gmail.com <kwfairchild at gmail.com>, Kenneth Fairchild <Ken.Fairchild at unh.edu>, angoldconsulting at earthlink.net <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 #648 ATS Approval (May 15 – 24, 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.
All,
Attached are the planning files for Orbit #648. Please respond to this thread with comments and approvals. Approvals for the Orbit 648 ATS are required by COB, 04 May 2024.
Please note the following:
Battery Balancing
Eclipse Flag True: 2024/05:23:23:00:00
Eclipse Flag False: 2024/05:24:00:30:00
Command Load Constraint Violation Report (CCVR)
IBEX_2024_136_o0648a_v001.ccvr
# Input files: 1
# IBEX_2024_136_o0648a_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 2024/05/15 10:46:37 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2024/05/19 03:27:29 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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