[Isocops] IBEX Orbit #599 ATS Approval (23 Feb - 04 Mar 2023)

Fri Feb 10 12:16:28 EST 2023

Hi all,
I have looked at the orbit 0599 ATS file, IBEX_2023_054_o0599a_v001.scr and I approve.

The constraint violations in IBEX_2023_054_o0599a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.

The PL commands in IBEX_2023_054_o0599a_v001.scr match those in the STF, IBEX_2023_054_o0599a_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_054_o0599a_v001.oef and as verified with ibex_orbit.

No star tracker outage this orbit.

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit599_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 0598 left us pointing in safe directions for the orbit 0599 arc A ascending and descending sequences:

ibex_rotate -o -u 0.906699,-0.382874,-0.17693  -w ibex-sun -t 2023/02:23:14:14:09
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  +0.906699,-0.382874,-0.176930
which is     R.A. +337.107 Decl. -10.191
missing      R.A. +336.241 Decl.  -9.928 (ibex-sun)
error is     R.A.   +0.866 Decl.  +0.263
for a total  0.892 deg

ibex_rotate -o -u 0.906699,-0.382874,-0.17693  -w ibex-sun -t 2023/02:27:05:02:32
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  +0.906699,-0.382874,-0.176930
which is     R.A. +337.107 Decl. -10.191
missing      R.A. +339.773 Decl.  -8.516 (ibex-sun)
error is     R.A.   +2.666 Decl.  +1.675
for a total  3.119 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 0.937875,-0.31461,-0.146325 -w ibex-sun -t 2023/02:27:06:45:40
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  +0.937875,-0.314610,-0.146325
which is     R.A. +341.456 Decl.  -8.414
missing      R.A. +339.840 Decl.  -8.488 (ibex-sun)
error is     R.A.   +1.616 Decl.  +0.074
for a total  1.600 deg

ibex_rotate -o -u 0.937875,-0.31461,-0.146325 -w ibex-sun -t 2023/02:27:08:20:46
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  +0.937875,-0.314610,-0.146325
which is     R.A. +341.456 Decl.  -8.414
missing      R.A. +339.902 Decl.  -8.462 (ibex-sun)
error is     R.A.   +1.554 Decl.  +0.048
for a total  1.537 deg

ibex_rotate -o -u 0.937875,-0.31461,-0.146325 -w ibex-sun -t 2023/03:03:18:51:07
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  +0.937875,-0.314610,-0.146325
which is     R.A. +341.456 Decl.  -8.414
missing      R.A. +343.943 Decl.  -6.821 (ibex-sun)
error is     R.A.   +2.487 Decl.  +1.593
for a total  2.934 deg

The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0600 apogee:

ibex_rotate -o -u 0.962011,-0.246322,-0.117728 -w ibex-sun -t 2023/03:03:21:47:32
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  +0.962011,-0.246322,-0.117728
which is     R.A. +345.638 Decl.  -6.761
missing      R.A. +344.054 Decl.  -6.781 (ibex-sun)
error is     R.A.   +1.585 Decl.  +0.020
for a total  1.574 deg

ibex_rotate -o -u 0.962011,-0.246322,-0.117728 -w ibex-sun -t 2023-03-08T16:43:32
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  +0.962011,-0.246322,-0.117728
which is     R.A. +345.638 Decl.  -6.761
missing      R.A. +348.619 Decl.  -4.874 (ibex-sun)
error is     R.A.   +2.981 Decl.  +1.887
for a total  3.514 deg

There is no overlap with orbit 0598 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, February 9, 2023 at 13:21
To: Carol Weaver <carol.weaver at unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin at ngc.com>, David Heirtzler <David.Heirtzler at unh.edu>, IBEX FDG Group <ADS-IBEX at l3harris.com>, IBEXOPS <IBEXOPS at gmail.com>, ISOC <isocops at lists.sr.unh.edu>, Ken Fairchild <fair-play at comcast.net>, Ken Fairchild (kwfairchild at gmail.com) <kwfairchild at gmail.com>, Kenneth Fairchild <Ken.Fairchild at unh.edu>, angoldconsulting <angoldconsulting at earthlink.net>, Paul Janzen <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 #599 ATS Approval (23 Feb - 04 Mar 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 #599. Please respond to this thread with comments and approvals.
Approvals are required by COB, 13 Feb 2023

Please note the following:

1.       Battery Balancing this orbit

Begin 2023/03/04 03:00:00– End 2023/03/04 04:30:00
Note the battery balancing was moved back a couple hours due to  the scheduling of the contacts were around perigee on the ascending side of the orbit.

2.       Command Load Constraint Violation Report (CCVR)
IBEX_2023_054_o0599a_v001.ccvr
# Input files:         1
#   IBEX_2023_054_o0599a_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 2023/02/23 12:02:34 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
             transition to science mode at 2023/02/27 07:50:46 UTC

==============
OTHER MESSAGES
==============
NO MESSAGES.

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