[Isocops] IBEX Orbit #654 ATS Approval (July 8 - 16, 2024)

Thu Jun 27 14:25:53 EDT 2024

Hi all,
I have looked at the orbit 0654 ATS file, IBEX_2024_189_o0654a_v001.scr and I approve.

The constraint violations in IBEX_2024_189_o0654a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.

The PL commands in IBEX_2024_189_o0654a_v001.scr match those in the STF, IBEX_2024_189_o0654a_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_189_o0654a_v001.oef and as verified with ibex_orbit.

There is 1 star tracker outage this orbit. Outage begins at 2024-07-16 17:40:53 and lasts for 3.4 hours.

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit654_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 0653 left us pointing in safe directions for the orbit 0654 arc A ascending and descending sequences:

ibex_rotate -o -u -0.232352,0.895921,0.3786 -w ibex-sun -t 2024/07:08:05:30:15
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.232352,+0.895921,+0.378600
which is     R.A. +104.539 Decl. +22.247
missing      R.A. +107.561 Decl. +22.437 (ibex-sun)
error is     R.A.   +3.022 Decl.  +0.190
for a total  2.802 deg

ibex_rotate -o -u -0.232352,0.895921,0.3786 -w ibex-sun -t 2024/07:11:16:33:26
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.232352,+0.895921,+0.378600
which is     R.A. +104.539 Decl. +22.247
missing      R.A. +111.034 Decl. +22.047 (ibex-sun)
error is     R.A.   +6.495 Decl.  +0.200
for a total  6.019 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 -0.302549,0.878316,0.370168 -w ibex-sun -t 2024/07:11:18:16:34
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.302549,+0.878316,+0.370168
which is     R.A. +109.007 Decl. +21.726
missing      R.A. +111.108 Decl. +22.038 (ibex-sun)
error is     R.A.   +2.101 Decl.  +0.312
for a total  1.974 deg

ibex_rotate -o -u -0.302549,0.878316,0.370168 -w ibex-sun -t 2024/07:11:19:51:40
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.302549,+0.878316,+0.370168
which is     R.A. +109.007 Decl. +21.726
missing      R.A. +111.176 Decl. +22.029 (ibex-sun)
error is     R.A.   +2.169 Decl.  +0.303
for a total  2.035 deg

ibex_rotate -o -u -0.302549,0.878316,0.370168 -w ibex-sun -t 2024/07:16:02:50:34
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.302549,+0.878316,+0.370168
which is     R.A. +109.007 Decl. +21.726
missing      R.A. +115.643 Decl. +21.363 (ibex-sun)
error is     R.A.   +6.636 Decl.  +0.363
for a total  6.183 deg

The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0655 apogee:

ibex_rotate -o -u -0.372876,0.854863,0.360795 -w ibex-sun -t 2024/07:16:04:54:44
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.372876,+0.854863,+0.360795
which is     R.A. +113.566 Decl. +21.149
missing      R.A. +115.731 Decl. +21.345 (ibex-sun)
error is     R.A.   +2.165 Decl.  +0.196
for a total  2.028 deg

ibex_rotate -o -u -0.372876,0.854863,0.360795 -w ibex-sun -t 2024-07-21T01:30:07
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.372876,+0.854863,+0.360795
which is     R.A. +113.566 Decl. +21.149
missing      R.A. +120.482 Decl. +20.508 (ibex-sun)
error is     R.A.   +6.916 Decl.  +0.641
for a total  6.495 deg

There is no overlap with orbit 0653 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, June 24, 2024 at 16:11
To: 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 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: FW: IBEX Orbit #654 ATS Approval (July 8 - 16, 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.

The approvals are required by COB 27 June not 17 June. Sorry about that…
From: Perry, Timothy E [US] (SP) <Timothy.Perry at ngc.com>
Sent: Monday, June 24, 2024 3:50 PM
To: 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 at unh.edu; ADS-IBEX at l3harris.com; IBEXOPS at gmail.com; isocops at lists.sr.unh.edu; kwfairchild at gmail.com; Ken.Fairchild at unh.edu; angoldconsulting at earthlink.net; 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 #654 ATS Approval (July 8 - 16, 2024)

All,

   Attached are the planning files for Orbit #654. Please respond to this thread with comments and approvals. Approvals for the Orbit 654 ATS are required by COB, 27 June 2024.

Please note the following:

Battery Balancing

Eclipse Flag True: 2024/07/16 14:00:00

Eclipse Flag False: 2024/07/16 15:30:00

Command Load Constraint Violation Report (CCVR)

IBEX_2024_189_o0654a_v001.scr

# Input files:         1

#   IBEX_2024_189_o0654a_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 2024/07/08 04:09:20 UTC

IBX-CLC-016: No command to enable spin pulse protection was found after

             transition to science mode at 2024/07/11 19:21:40 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>
IBEX MOC (703)404-7470
Cell (301) 606-1430

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