[Isocops] IBEX Orbit #503 ATS Approval ( 4 Oct 20 13 Oct 20)
Weaver, Carol
Carol.Weaver at unh.edu
Fri Sep 18 20:10:23 EDT 2020
I have looked at the orbit 503 ATS files: IBEX_2020_278_o0503a_INST_v001.scr, IBEX_2020_278_o0503a_BUS_v002.scr and I approve.
The only constraint violations in IBEX_2020_278_o0503a_INST_v001.ccvr and IBEX_2020_278_o0503a_BUS_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands (2); the violations are expected.
The PL commands in IBEX_2020_278_o0503a_INST_v001.scr match those in IBEX_2020_278_o0503a_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_2020_278_o0503a_BUS_v001.oef and as verified with the crossing times report and ibex_orbit.
There is one star tracker outages due to the moon around perigee lasting ~21 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit503_Contacts.txt for the (4) contacts.
We are doing battery cell balancing this orbit and the balancing commands are correct and offset by enough time from other commands.
The sun precession maneuver at perigee of orbit 502 left us pointing in a safe direction for the orbit 503 arc A ascending and descending sequences:
ibex_rotate -o -r 190.285 -d -4.430 -w ibex-sun -t 2020/10:04:12:02:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.980992,-0.178011,-0.077241
which is R.A. +190.285 Decl. -4.430
missing R.A. +190.541 Decl. -4.551 (ibex-sun)
error is R.A. +0.256 Decl. +0.121
for a total 0.283 deg
ibex_rotate -o -r 190.285 -d -4.430 -w ibex-sun -t 2020/10:08:09:24:18
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.980992,-0.178011,-0.077241
which is R.A. +190.285 Decl. -4.430
missing R.A. +193.974 Decl. -5.972 (ibex-sun)
error is R.A. +3.689 Decl. +1.542
for a total 3.985 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 -0.973015,-0.207513,-0.1009 -w ibex-sun -t 2020/10:08:11:07:26
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.973015,-0.207513,-0.100900
which is R.A. +192.039 Decl. -5.791
missing R.A. +194.040 Decl. -5.998 (ibex-sun)
error is R.A. +2.001 Decl. +0.207
for a total 2.001 deg
ibex_rotate -o -u -0.973015,-0.207513,-0.1009 -w ibex-sun -t 2020/10:08:12:42:32
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.973015,-0.207513,-0.100900
which is R.A. +192.039 Decl. -5.791
missing R.A. +194.100 Decl. -6.022 (ibex-sun)
error is R.A. +2.061 Decl. +0.231
for a total 2.063 deg
ibex_rotate -o -u -0.973015,-0.207513,-0.1009 -w ibex-sun -t 2020/10:13:05:03:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.973015,-0.207513,-0.100900
which is R.A. +192.039 Decl. -5.791
missing R.A. +198.531 Decl. -7.834 (ibex-sun)
error is R.A. +6.492 Decl. +2.043
for a total 6.762 deg
The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 504 apogee
ibex_rotate -o -u -0.951569,-0.278384,-0.130457 -w ibex-sun -t 2020/10:13:10:52:41
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.951569,-0.278384,-0.130457
which is R.A. +196.307 Decl. -7.496
missing R.A. +198.760 Decl. -7.937 (ibex-sun)
error is R.A. +2.453 Decl. +0.441
for a total 2.470 deg
ibex_rotate -o -u -0.951569,-0.278384,-0.130457 -w ibex-sun -t 2020/10:18:01:43:06
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.951569,-0.278384,-0.130457
which is R.A. +196.307 Decl. -7.496
missing R.A. +202.943 Decl. -9.580 (ibex-sun)
error is R.A. +6.636 Decl. +2.084
for a total 6.885 deg
There is no overlap with Orbit 502 commands by manual inspection or by checking at 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%7Cd432459eac2645c61d2008d855cbc137%7Cd6241893512d46dc8d2bbe47e25f5666%7C0%7C0%7C637353680905016779&sdata=cAIPmUJbtS8AzUoQf4yWiGQy4SlzToopbvC%2BEVORbFg%3D&reserved=0>.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503.902.8492
From: "Perry, Timothy E [US] (IS)" <Timothy.Perry at ngc.com>
Date: Thursday, 17 September 2020 at 15:51
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 <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 #503 ATS Approval ( 4 Oct 20 13 Oct 20)
Caution - External Email
All,
I received confirmation from APL this morning for the pass on 10/13/20 @04:00:00 gmt. So, I would like to use this version 2 BUS ATS, instead of creating a new ATS for just the APL commands.
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 01D68DEF.5BE59100]
From: Perry, Timothy E [US] (IS)
Sent: Wednesday, September 16, 2020 6:32 PM
To: 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 <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 #503 ATS Approval ( 4 Oct 20 13 Oct 20)
All,
Attached are the planning files for Orbit #503
Please respond to this thread with comments and approvals.
Approvals are required by COB on 19 September 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
# 2020-10-13T12:27:12.723Z,Perigee,orbit:503
Begin - 2020/10:13:12:00:00 – End - 2020/10:13:13:30:00
1. Orbit# 501 Reset Master Timer - 2020/09:25:13:15:00
1. APL Contact
The commands have been commented out because I am still waiting on the schedule confirmation from APL. I will create a separate ATS for the APL contact once the contact has been confirmed.
Just a reminder for the APL contact. We will 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 New command
1. Command Load Constraint Violation Report (CCVR)
IBEX_2020_278_o0503a_v001.ccvr
# Input files: 1
# IBEX_2020_278_o0503a_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 2020/10/04 05:36:29 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2020/10/08 12:12:32 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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