Hi all,
I have looked at the orbit 0523 ATS files, IBEX_2021_093_o0523a_BUS_V001.scr, IBEX_2021_093_o0523a_INST_V001.scr and I approve.
The constraint violations in IBEX_2021_093_o0523a_BUS_v001.ccvr and IBEX_2021_093_o0523a_INST_v001.ccvr
are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2021_093_o0523a_INST_V001.scr match those in the v002 STF, IBEX_2021_093_o0523a_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_2021_093_o0523a_BUS_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_Orbit523_Contacts.txt for all contacts (2).
No Battery Balancing this orbit
The Inertial maneuver at perigee of orbit 0522 left us pointing in safe directions for the orbit 0523 arc A ascending and descending sequences:
ibex_rotate -o -u 0.981968,0.176826,0.066866 -w ibex-sun -t 2021/04:03:10:29:22
Quaternion
+0.000000,+0.000000,+0.000000,+0.000000
points axis
+1.000000,+0.000000,+0.000000
towards ECI
+0.981968,+0.176826,+0.066866
which is
R.A.
+10.208 Decl.
+3.834
missing
R.A. +12.496 Decl.
+5.337 (ibex-sun)
error is
R.A.
+2.288 Decl.
+1.503
for a total
2.731 deg
ibex_rotate -o -u 0.981968,0.176826,0.066866 -w ibex-sun -t 2021/04:07:02:17:07
Quaternion
+0.000000,+0.000000,+0.000000,+0.000000
points axis
+1.000000,+0.000000,+0.000000
towards ECI
+0.981968,+0.176826,+0.066866
which is
R.A.
+10.208 Decl.
+3.834
missing
R.A. +15.945 Decl.
+6.796 (ibex-sun)
error is
R.A.
+5.737 Decl.
+2.962
for a total
6.434 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 0.96423,0.247016,0.096141 -w ibex-sun -t 2021/04:07:04:00:15
Quaternion
+0.000000,+0.000000,+0.000000,+0.000000
points axis
+1.000000,+0.000000,+0.000000
towards ECI
+0.964230,+0.247016,+0.096141
which is
R.A.
+14.369 Decl.
+5.517
missing
R.A. +16.011 Decl.
+6.824 (ibex-sun)
error is
R.A.
+1.642 Decl.
+1.307
for a total
2.091 deg
ibex_rotate -o -u 0.96423,0.247016,0.096141 -w ibex-sun -t 2021/04:07:05:35:21
Quaternion
+0.000000,+0.000000,+0.000000,+0.000000
points axis
+1.000000,+0.000000,+0.000000
towards ECI
+0.964230,+0.247016,+0.096141
which is
R.A.
+14.369 Decl.
+5.517
missing
R.A. +16.072 Decl.
+6.850 (ibex-sun)
error is
R.A.
+1.703 Decl.
+1.333
for a total
2.155 deg
ibex_rotate -o -u 0.96423,0.247016,0.096141 -w ibex-sun -t 2021/04:11:17:30:19
Quaternion
+0.000000,+0.000000,+0.000000,+0.000000
points axis
+1.000000,+0.000000,+0.000000
towards ECI
+0.964230,+0.247016,+0.096141
which is
R.A.
+14.369 Decl.
+5.517
missing
R.A. +20.091 Decl.
+8.484 (ibex-sun)
error is
R.A.
+5.722 Decl.
+2.967
for a total
6.408 deg
The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0524 apogee:
ibex_rotate -o -u 0.940256,0.315847,0.127117 -w ibex-sun -t 2021/04:11:21:36:58
Quaternion
+0.000000,+0.000000,+0.000000,+0.000000
points axis
+1.000000,+0.000000,+0.000000
towards ECI
+0.940256,+0.315847,+0.127117
which is
R.A.
+18.568 Decl.
+7.303
missing
R.A. +20.243 Decl.
+8.538 (ibex-sun)
error is
R.A.
+1.675 Decl.
+1.235
for a total
2.068 deg
ibex_rotate -o -u 0.940256,0.315847,0.127117 -w ibex-sun -t 2021-04-16T19:56:15
Quaternion
+0.000000,+0.000000,+0.000000,+0.000000
points axis
+1.000000,+0.000000,+0.000000
towards ECI
+0.940256,+0.315847,+0.127117
which is
R.A.
+18.568 Decl.
+7.303
missing
R.A. +24.907 Decl. +10.359 (ibex-sun)
error is
R.A.
+6.339 Decl.
+3.056
for a total
6.969 deg
There is no overlap with orbit 0522 commands.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503.902.8492
From:
Perry, Timothy E [US] (SP) <Timothy.Perry@ngc.com>
Date: Thursday, 2021-March-18 at 15:42
To: Weaver, Carol <Carol.Weaver@unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin@ngc.com>, Heirtzler, David <David.Heirtzler@unh.edu>, IBEX FDG Group (ADS-IBEX@l3harris.com) <ADS-IBEX@l3harris.com>, IBEXOPS <IBEXOPS@gmail.com>, ISOC <isocops@lists.sr.unh.edu>,
Ken Fairchild <fair-play@comcast.net>, Ken Fairchild (kwfairchild@gmail.com) <kwfairchild@gmail.com>, Nigel Angold <angoldconsulting@earthlink.net>, Paul Janzen <Paul.Janzen@mso.umt.edu>, Perry, Timothy E [US] (SP) <Timothy.Perry@ngc.com>, Tyler, Ryan S [US]
(SP) <Ryan.Tyler@ngc.com>, Wesley, Sheral R [US] (SP) <Sheral.Wesley@ngc.com>, Wynn, Reese [US] (SP) <Reese.Wynn@ngc.com>
Subject: IBEX Orbit #523 ATS Approval (3 – 12 Apr 21)
Caution - External Email
All,
Attached are the planning files for Orbit #523 Please respond to this thread with comments and approvals.
Approvals are required by COB on 23 March 2021
Please note the following:
- I generated 3 separate ATS files BUS, INST and a complete file. The BUS and INST will be the files to be uplinked. The complete ATS, I used as a sanity check to see how the commands lined up. Since we are
in a new phase of ATS generation. IF you have any ideas of doing this differently, let me know.
- The 3 ATS files have been changed to word files and encrypted. I will send out another email with the password. The files that have been transferred via MFT have not been encrypted and are still text files.
- I moved the 2 House Keeping commands from the INST ATS to the BUS ATS. I commented out the 2 commands in the INST ATS. If for some reason we were unable to uplink the INST Commands for this orbit, we would have been in the wrong spacecraft state for executing the maneuver commands.
- No Battery Balancing this orbit
- # Orbit# 520 Reset Master Timer - 2021/03:25:04:45:00
- Command Load Constraint Violation Report (CCVR)
IBEX_2021_093_o0523a_v001.ccvr
# Input files: 1
# IBEX_2021_093_o0523a_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 2021/04/03 07:27:52 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2021/04/07 05:05:21 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES
Timothy E.Perry
CRS IBEX OCO-2
Mission Operations
timothy.perry@ngc.com
Office (703) 406-5976
Cell (301) 606-1430
