[Isocops] IBEX Orbit #583 ATS Approval (01 - 10 Oct 2022)

Mon Sep 19 10:43:44 EDT 2022

Hi all,
I have looked at the orbit 0583 ATS file, IBEX_2022_274_o0583a_v001.scr and I approve.

The constraint violations in IBEX_2022_274_o0583a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.

The PL commands in IBEX_2022_274_o0583a_v001.scr match those in the STF, IBEX_2022_274_o0583a_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_2022_274_o0583a_v001.oef and as verified with ibex_orbit.

There is 1 star tracker outage this orbit lasting over 6 days and spanning both perigee and apogee.

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit583_Contacts.txt for all contacts (3).

No Battery Balancing this orbit

The Inertial maneuver at perigee of orbit 0582 left us pointing in safe directions for the orbit 0583 arc A ascending and descending sequences:

 ibex_rotate -o -u -0.99583,-0.07972,-0.044352 -w ibex-sun -t 2022/10:01:12:07:00
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.995830,-0.079720,-0.044352
which is     R.A. +184.577 Decl.  -2.542
missing      R.A. +187.365 Decl.  -3.199 (ibex-sun)
error is     R.A.   +2.788 Decl.  +0.657
for a total  2.860 deg

ibex_rotate -o -u -0.99583,-0.07972,-0.044352 -w ibex-sun -t 2022/10:05:16:58:34
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.995830,-0.079720,-0.044352
which is     R.A. +184.577 Decl.  -2.542
missing      R.A. +191.074 Decl.  -4.749 (ibex-sun)
error is     R.A.   +6.497 Decl.  +2.207
for a total  6.849 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 +191.142 -d -4.776  -w ibex-sun -t 2022/10:05:18:46:42
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.977745,-0.192570,-0.083260
which is     R.A. +191.142 Decl.  -4.776
missing      R.A. +191.142 Decl.  -4.776 (ibex-sun)
error is     R.A.   +0.000 Decl.  +0.000
for a total  0.000 deg

ibex_rotate -o -r +191.142 -d -4.776  -w ibex-sun -t 2022/10:05:20:16:48
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.977745,-0.192570,-0.083260
which is     R.A. +191.142 Decl.  -4.776
missing      R.A. +191.199 Decl.  -4.799 (ibex-sun)
error is     R.A.   +0.057 Decl.  +0.023
for a total  0.061 deg

ibex_rotate -o -r +191.142 -d -4.776  -w ibex-sun -t 2022/10:10:00:07:48
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.977745,-0.192570,-0.083260
which is     R.A. +191.142 Decl.  -4.776
missing      R.A. +195.093 Decl.  -6.427 (ibex-sun)
error is     R.A.   +3.951 Decl.  +1.651
for a total  4.264 deg

The Sun precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0584 apogee:

ibex_rotate -o -r +195.253 -d -6.500 -w ibex-sun -t 2022/10:10:04:09:05
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.958572,-0.261391,-0.113203
which is     R.A. +195.253 Decl.  -6.500
missing      R.A. +195.253 Decl.  -6.500 (ibex-sun)
error is     R.A.   +0.000 Decl.  +0.000
for a total  0.000 deg

ibex_rotate -o -r +195.253 -d -6.500  -w ibex-sun -t 2022-10-15T02:17:12
Quaternion    +0.000000,+0.000000,+0.000000,+0.000000
points axis  +1.000000,+0.000000,+0.000000
towards ECI  -0.958572,-0.261391,-0.113203
which is     R.A. +195.253 Decl.  -6.500
missing      R.A. +199.706 Decl.  -8.303 (ibex-sun)
error is     R.A.   +4.453 Decl.  +1.803
for a total  4.770 deg

There is no overlap with orbit 0582 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: Friday, 2022-September-16 at 13:37
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 #583 ATS Approval (01 - 10 Oct 2022)
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All,
   Attached are the planning files for Orbit #583. Please respond to this thread with comments and approvals. Approvals are required by COB, 20 Sept 2022

Please note the following:

  1.  Apogee Sun Maneuver – 2022/10/05 18:31:42

  1.  Perigee Sun Maneuver – 2022/10/10 03:54:05

3.       No Battery Balancing this orbit

Begin 2022/10/01 03:00:00– End 2022/10/01 04:30:00

4.       Command Load Constraint Violation Report (CCVR)
IBEX_2022_274_o0583a_v001.ccvr
# Input files:         1
#   IBEX_2022_274_o0583a_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 2022/10/01 08:42:55 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
             transition to science mode at 2022/10/05 19:46:48 UTC

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

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