[Isocops] IBEX Orbit #624 ATS Approval ( Oct 09 - 18, 2023)
Carol Weaver
Carol.Weaver at unh.edu
Tue Sep 26 11:41:42 EDT 2023
Hi all,
The angle at descending after the apogee Sun maneuver is 3.959 deg.
I have looked at the orbit 0624 ATS file, IBEX_2023_281_o0624a_v001.scr and I approve.
The constraint violations in IBEX_2023_281_o0624a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2023_281_o0624a_v001.scr match those in the STF, IBEX_2023_281_o0624a_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_281_o0624a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins at 2023-10-10 00:30:09 and lasts for 35.8 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit624_Contacts.txt for all contacts (4).
Battery Balancing is 90 minutes long, more than 2 hours away from payload descending macros, 4.788 hrs, and more than 15 minutes away from a maneuver, 148 mins.
The Inertial maneuver at perigee of orbit 0623 left us pointing in safe directions for the orbit 0624 arc A ascending and descending sequences:
ibex_rotate -o -u -0.975646,-0.197505,-0.095429 -w ibex-sun -t 2023/10:09:11:21:44
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.975646,-0.197505,-0.095429
which is R.A. +191.444 Decl. -5.476
missing R.A. +194.373 Decl. -6.163 (ibex-sun)
error is R.A. +2.929 Decl. +0.687
for a total 2.994 deg
ibex_rotate -o -u -0.975646,-0.197505,-0.095429 -w ibex-sun -t 2023/10:13:09:51:53
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.975646,-0.197505,-0.095429
which is R.A. +191.444 Decl. -5.476
missing R.A. +197.917 Decl. -7.580 (ibex-sun)
error is R.A. +6.473 Decl. +2.104
for a total 6.766 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 +197.986 -d -7.607 -w ibex-sun -t 2023/10:13:11:40:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.942761,-0.306067,-0.132377
which is R.A. +197.986 Decl. -7.607
missing R.A. +197.986 Decl. -7.607 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +197.986 -d -7.607 -w ibex-sun -t 2023/10:13:13:10:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.942761,-0.306067,-0.132377
which is R.A. +197.986 Decl. -7.607
missing R.A. +198.043 Decl. -7.629 (ibex-sun)
error is R.A. +0.057 Decl. +0.022
for a total 0.061 deg
ibex_rotate -o -r +197.986 -d -7.607 -w ibex-sun -t 2023/10:17:10:12:43
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.942761,-0.306067,-0.132377
which is R.A. +197.986 Decl. -7.607
missing R.A. +201.698 Decl. -9.085 (ibex-sun)
error is R.A. +3.712 Decl. +1.478
for a total 3.959 deg
The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0625 apogee:
ibex_rotate -o -u -0.930464,-0.332477,-0.153934 -w ibex-sun -t 2023/10:17:12:32:22
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.930464,-0.332477,-0.153934
which is R.A. +199.663 Decl. -8.855
missing R.A. +201.794 Decl. -9.126 (ibex-sun)
error is R.A. +2.131 Decl. +0.271
for a total 2.122 deg
ibex_rotate -o -u -0.930464,-0.332477,-0.153934 -w ibex-sun -t 2023-10-22T09:13:32
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.930464,-0.332477,-0.153934
which is R.A. +199.663 Decl. -8.855
missing R.A. +206.319 Decl. -10.863 (ibex-sun)
error is R.A. +6.656 Decl. +2.008
for a total 6.858 deg
There is no overlap with orbit 0623 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: Monday, September 25, 2023 at 12:00
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 #624 ATS Approval ( Oct 09 - 18, 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 products for Orbit #624. Please respond to this thread with comments and approvals. Approvals are required by 16:00gmt 29 Sept 2023
Please note the following:
1. Battery Balancing this Orbit.
Begin 2023/10/17 15:00:00 – End 2023/10/17 16:30:00
The Battery balancing will not take place at perigee since the second perigee contact is at 21:00:00 gmt. The next best quiet time in the orbit was @15:00 – 16:30. This is between the perigee maneuver and the second tracking contact.
2. Command Load Constraint Violation Report (CCVR)
IBEX_2023_281_o0624a_v001.ccvr
# Input files: 1
# IBEX_2023_272_o0623a_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 2023/09/30 07:43:58 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2023/10/04 12:23:14 UTC
==============
OTHER MESSAGES
==============
NO MESSAGE
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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