[Isocops] IBEX Orbit #496 ATS Approval ( 31 July – 9 Aug 2020 )
Weaver, Carol
Carol.Weaver at unh.edu
Mon Jul 20 17:43:56 EDT 2020
Hi all,
I have looked at the orbit 496 ATS files IBEX_2020_213_o0496a_BUS_v001.scr and IBEX_2020_213_o0496a_INST_v001.scr and I approve.
There was one overlap with orbit 495 commands on http://ibex.unh.edu/cgi-bin/ats.cgi<https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fibex.unh.edu%2Fcgi-bin%2Fats.cgi&data=02%7C01%7Ccarol.weaver%40unh.edu%7C47c6b3598c4b41a6528d08d81eafeac6%7Cd6241893512d46dc8d2bbe47e25f5666%7C0%7C0%7C637293088195769267&sdata=M4%2FhbWXouEYYZJkL24eXLaqDjNPhBQWG46yfnvgtvZE%3D&reserved=0> and the initial files with the 2022 file names are still ingested.
The constraint violations in IBEX_2020_213_o0496a_INST_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands (2); the violations are expected. The constraint violations in IBEX_2020_213_o0496a_INST_v001.ccvr (2) are due to contacts not separated by 5 hours and are acceptable.
The PL commands in IBEX_2020_213_o0496a_INST_v001.scr match those in the IBEX_2020_213_o0496a_v002.stf aside from the CEU_SSR_DUMP_NEW command due to the APL contact. This is expected.
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_2020_213_o0495a_BUS_v001.oef and as verified with ibex_orbit.
There is one star tracker outage this orbit. It starts about 1.5 hours after perigee and runs for about 2 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit496_Contacts.txt, for all contacts (4).
The inertial precession maneuver at perigee of orbit 495 left us pointing in a safe direction for the orbit 496 arc A ascending and descending sequences:
ibex_rotate -o -u -0.588573,0.745263,0.313313 -w ibex-sun -t 2020/07:31:18:15:26
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.588573,+0.745263,+0.313313
which is R.A. +128.300 Decl. +18.259
missing R.A. +131.118 Decl. +18.066 (ibex-sun)
error is R.A. +2.818 Decl. +0.193
for a total 2.684 deg
ibex_rotate -o -u -0.588573,0.745263,0.313313 -w ibex-sun -t 2020/08:04:11:50:26
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.588573,+0.745263,+0.313313
which is R.A. +128.300 Decl. +18.259
missing R.A. +134.676 Decl. +17.138 (ibex-sun)
error is R.A. +6.376 Decl. +1.121
for a total 6.177 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 -0.647738,0.702931,0.293807 -w ibex-sun -t 2020/08:04:13:33:34
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.647738,+0.702931,+0.293807
which is R.A. +132.660 Decl. +17.086
missing R.A. +134.747 Decl. +17.119 (ibex-sun)
error is R.A. +2.087 Decl. +0.033
for a total 1.995 deg
ibex_rotate -o -u -0.647738,0.702931,0.293807 -w ibex-sun -t 2020/08:04:15:08:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.647738,+0.702931,+0.293807
which is R.A. +132.660 Decl. +17.086
missing R.A. +134.811 Decl. +17.102 (ibex-sun)
error is R.A. +2.151 Decl. +0.016
for a total 2.056 deg
ibex_rotate -o -u -0.647738,0.702931,0.293807 -w ibex-sun -t 2020/08:09:07:03:13
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.647738,+0.702931,+0.293807
which is R.A. +132.660 Decl. +17.086
missing R.A. +139.366 Decl. +15.776 (ibex-sun)
error is R.A. +6.706 Decl. +1.310
for a total 6.564 deg
The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 497 apogee:
ibex_rotate -o -u -0.705841,0.653433,0.273523 -w ibex-sun -t 2020/08:09:11:46:30
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.705841,+0.653433,+0.273523
which is R.A. +137.208 Decl. +15.874
missing R.A. +139.544 Decl. +15.713 (ibex-sun)
error is R.A. +2.336 Decl. +0.161
for a total 2.253 deg
ibex_rotate -o -u -0.705841,0.653433,0.273523 -w ibex-sun -t 2020/08:14:08:01:47
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.705841,+0.653433,+0.273523
which is R.A. +137.208 Decl. +15.874
missing R.A. +144.021 Decl. +14.302 (ibex-sun)
error is R.A. +6.813 Decl. +1.572
for a total 6.763 deg
Lo Background mode for the entire orbit.
Command approval checklist is attached.
Thanks,
Carol
--
Carol Weaver
University of New Hampshire
503.902.8492
From: "Perry, Timothy E [US] (IS)" <Timothy.Perry at ngc.com>
Date: Monday, 20 July 2020 at 08:49
To: "Weaver, Carol" <Carol.Weaver at unh.edu>, "Chubin, Eric [US] (IS)" <Eric.Chubin at ngc.com>, "Heirtzler, David" <David.Heirtzler at unh.edu>, IBEX FDG <IBEX at applieddefense.info>, 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>, Nigel Angold <nigel.angold at nasa.gov>, Nigel Angold <angoldconsulting at earthlink.net>, Paul Janzen <paul.janzen at umontana.edu>, "Tyler, Ryan S [US] (IS)" <Ryan.Tyler at ngc.com>, "Wesley, Sheral R [US] (IS)" <Sheral.Wesley at ngc.com>, "Wynn, Reese [US] (IS)" <Reese.Wynn at ngc.com>
Subject: RE: IBEX Orbit #496 ATS Approval ( 31 July – 9 Aug 2020 )
Caution - External Email
All,
Attached are the Orbit 496 ATS files with the corrected names. The files have also been placed on the MFT server.
Tim
Timothy E.Perry
CRS IBEX OCO-2
Mission Operations
timothy.perry at ngc.com
Office (703) 406-5976
Cell (301) 606-1430
[cid:image001.png at 01D65EB4.F5454490]
From: Perry, Timothy E [US] (IS)
Sent: Thursday, July 16, 2020 4:21 PM
To: 'carol.weaver at unh.edu' <carol.weaver at unh.edu>; Chubin, Eric [US] (IS) <Eric.Chubin at ngc.com>; 'David Heirtzler' <David.Heirtzler at unh.edu>; 'IBEX FDG' <IBEX at applieddefense.info>; '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>; 'Nigel Angold' <nigel.angold at nasa.gov>; 'Nigel Angold' <angoldconsulting at earthlink.net>; 'Paul Janzen' <paul.janzen at umontana.edu>; Perry, Timothy E [US] (IS) <Timothy.Perry at ngc.com>; Tyler, Ryan S [US] (IS) <Ryan.Tyler at ngc.com>; Wesley, Sheral R [US] (IS) <Sheral.Wesley at ngc.com>; Wynn, Reese [US] (IS) <Reese.Wynn at ngc.com>
Subject: IBEX Orbit #496 ATS Approval ( 31 July – 9 Aug 2020 )
All,
Attached are the planning files for Orbit #496
Please respond to this thread with comments and approvals.
Approvals are required by COB on 20 July 2020
Please note the following:
1. 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.
1. 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.
1. 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.
1. Battery Balancing this orbit
No Battery Balancing this orbit
1. Orbit# 494 Reset Master Timer command
The Master Timer Reset Command is set for 2020/07:22:08:45:00. This command will execute on the following contact for Orbit 494
IBEX,USAK01,ADD,07/22/20,204,08:00:00,07/22/20,204,09:00:00,LAHO 160K IBEX-2 Orbit# 494 SSR_Dump/Tracking Contact 13 asc
1. APL Contact
Just a reminder for the APL contact. We start off at 2k D\L, after 5 minutes we switch to 320k D\L, Then 5 minutes later we start the SSR Dump With Dump
IBEX,APL-18,ADD,2020-08-09,222,14:00:00,2020-08-09,222,15:00:00,, LAHO 2K-360k Orbit# 496 SSR_Dump Contact Perigee
1. Command Load Constraint Violation Report (CCVR)
IBEX_2020_213_o0496a_v001.ccvr
We have 2 IBX-CLC-006 Soft Constraint violations. The reason it that there are 2 contacts that are separated by 4 hours and the limit is 5 hours between contacts. These are acceptable,
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
IBX-CLC-006: Planned transmission at 2020/08/09 13:58:00 UTC - 2020/08/09
15:02:00 UTC is followed by one or more additional transmissions
which, when combined, exceed the maximum transmission time of 5400
seconds within a 18000-second window (total planned transmission
time this window is 7680.000 seconds)
IBX-CLC-006: Planned transmission at 2020/08/09 18:58:00 UTC - 2020/08/09
20:02:00 UTC is preceded by one or more additional transmissions
which, when combined, exceed the maximum transmission time of 5400
seconds within a 18000-second window (total planned transmission
time this window is 7680.000 seconds)
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2020/07/31 15:26:46 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2020/08/04 14:38:40 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>
Office (703) 406-5976
Cell (301) 606-1430
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