[Isocops] IBEX Orbit #625 ATS Approval ( Oct 18 - 26, 2023)

Carol Weaver Carol.Weaver at unh.edu
Fri Oct 6 14:26:02 EDT 2023 

Hi all,
I have looked at the orbit 0625 ATS file, IBEX_2023_290_o0625a_v001.scr and I approve.

The constraint violations in IBEX_2023_290_o0625a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.

The PL commands in IBEX_2023_290_o0625a_v001.scr match those in the STF, IBEX_2023_290_o0625a_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_290_o0625a_v001.oef and as verified with ibex_orbit.

There are 2 star tracker outages this orbit. The first outage begins at 2023-10-19 00:49:31 and lasts for 50.1 hours. The second outage begins at 2023-10-24 02:28:12 and lasts for 46.0 hours.

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit625_Contacts.txt for all contacts (3).

No Battery Balancing this orbit.

The Inertial maneuver at perigee of orbit 0624 left us pointing in safe directions for the orbit 0625 arc A ascending and descending sequences:

ibex_rotate -o -u -0.930464,-0.332477,-0.153934 -w ibex-sun -t 2023/10:18:09:46:42
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. +202.648 Decl.  -9.498 (ibex-sun)
error is     R.A.   +2.985 Decl.  +0.643
for a total  3.016 deg

ibex_rotate -o -u -0.930464,-0.332477,-0.153934 -w ibex-sun -t 2023/10:21:21:41:16
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. +205.870 Decl. -10.701 (ibex-sun)
error is     R.A.   +6.207 Decl.  +1.846
for a total  6.389 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 -0.898791,-0.398177,-0.183385 -w ibex-sun -t 2023/10:21:23:24:24
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.898791,-0.398177,-0.183385
which is     R.A. +203.894 Decl. -10.567
missing      R.A. +205.937 Decl. -10.725 (ibex-sun)
error is     R.A.   +2.043 Decl.  +0.158
for a total  2.014 deg

ibex_rotate -o -u -0.898791,-0.398177,-0.183385 -w ibex-sun -t 2023/10:22:00:59:30
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.898791,-0.398177,-0.183385
which is     R.A. +203.894 Decl. -10.567
missing      R.A. +205.998 Decl. -10.747 (ibex-sun)
error is     R.A.   +2.104 Decl.  +0.180
for a total  2.076 deg

ibex_rotate -o -u -0.898791,-0.398177,-0.183385 -w ibex-sun -t 2023/10:26:08:23:46
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.898791,-0.398177,-0.183385
which is     R.A. +203.894 Decl. -10.567
missing      R.A. +210.130 Decl. -12.256 (ibex-sun)
error is     R.A.   +6.236 Decl.  +1.689
for a total  6.341 deg

The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0626 apogee:

ibex_rotate -o -u -0.862846,-0.460117,-0.20926 -w ibex-sun -t 2023/10:26:10:43:38
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.862846,-0.460117,-0.209260
which is     R.A. +208.069 Decl. -12.079
missing      R.A. +210.228 Decl. -12.294 (ibex-sun)
error is     R.A.   +2.159 Decl.  +0.216
for a total  2.121 deg

ibex_rotate -o -u -0.862846,-0.460117,-0.20926 -w ibex-sun -t 2023-10-31T10:11:17
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.862846,-0.460117,-0.209260
which is     R.A. +208.069 Decl. -12.079
missing      R.A. +215.007 Decl. -13.948 (ibex-sun)
error is     R.A.   +6.938 Decl.  +1.869
for a total  7.013 deg

There is no overlap with orbit 0624 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: Wednesday, October 4, 2023 at 13:48
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 #625 ATS Approval ( Oct 18 - 26, 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 #625    Please respond to this thread with comments and approvals. Approvals are required by COB 07 Oct 2023



Please note the following:

1.        No Battery Balancing this Orbit.



2.        Command Load Constraint Violation Report (CCVR)

IBEX_2023_290_o0625a_v001.ccvr

# Input files:         1

#   IBEX_2023_290_o0625a_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 2023/10/18 08:10:59 UTC

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

             transition to science mode at 2023/10/22 00:29:30 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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