[Isocops] IBEX Orbit #507 ATS Approval (10 - 19 Nov 20)
Weaver, Carol
Carol.Weaver at unh.edu
Tue Oct 27 17:24:39 EDT 2020
Hi all,
I approve IBEX_2020_314_o0507a_INST_v001.scr, IBEX_2020_314_o0507a_BUS_v001.scr
Constraint violations: IBEX_2020_314_o0507a_INST_v001.ccvr, IBEX_2020_314_o0507a_BUS_v001.ccvr have the 2 expected violations from removal of ACT_SetSpinPulseProtectEnable
PL commands in IBEX_2020_314_o0507a_INST_v001.scr match those in IBEX_2020_314_o0507a_v002.stf
Star Tracker Outage: 1 outage that occurs before the 507 apogee maneuver and lasts for ~30 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit507_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 inertial maneuver at perigee of 506 left us pointing in a safe direction for the orbit 507 arc A ascending and descending sequences:
ibex_rotate -o -u -0.706586,-0.645631,-0.28965 -w ibex-sun -t 2020/11:10:03:48:13
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.706586,-0.645631,-0.289650
which is R.A. +222.419 Decl. -16.837
missing R.A. +225.491 Decl. -17.199 (ibex-sun)
error is R.A. +3.072 Decl. +0.362
for a total 2.959 deg
ibex_rotate -o -u -0.706586,-0.645631,-0.28965 -w ibex-sun -t 2020/11:13:19:26:51
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.706586,-0.645631,-0.289650
which is R.A. +222.419 Decl. -16.837
missing R.A. +229.114 Decl. -18.142 (ibex-sun)
error is R.A. +6.695 Decl. +1.305
for a total 6.517 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 -0.647603,-0.695053,-0.312269 -w ibex-sun -t 2020/11:13:20:36:49
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.647603,-0.695053,-0.312269
which is R.A. +227.024 Decl. -18.196
missing R.A. +229.163 Decl. -18.154 (ibex-sun)
error is R.A. +2.139 Decl. +0.042
for a total 2.032 deg
ibex_rotate -o -u -0.647603,-0.695053,-0.312269 -w ibex-sun -t 2020/11:13:22:11:55
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.647603,-0.695053,-0.312269
which is R.A. +227.024 Decl. -18.196
missing R.A. +229.229 Decl. -18.170 (ibex-sun)
error is R.A. +2.205 Decl. +0.026
for a total 2.095 deg
ibex_rotate -o -u -0.647603,-0.695053,-0.312269 -w ibex-sun -t 2020/11:18:07:03:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.647603,-0.695053,-0.312269
which is R.A. +227.024 Decl. -18.196
missing R.A. +233.794 Decl. -19.262 (ibex-sun)
error is R.A. +6.770 Decl. +1.066
for a total 6.499 deg
The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 508 apogee:
ibex_rotate -o -u -0.58704,-0.739148,-0.330218 -w ibex-sun -t 2020/11:18:10:09:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.587040,-0.739148,-0.330218
which is R.A. +231.543 Decl. -19.282
missing R.A. +233.936 Decl. -19.300 (ibex-sun)
error is R.A. +2.393 Decl. +0.018
for a total 2.259 deg
ibex_rotate -o -u -0.58704,-0.739148,-0.330218 -w ibex-sun -t 2020/11:23:04:43:02
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.587040,-0.739148,-0.330218
which is R.A. +231.543 Decl. -19.282
missing R.A. +238.877 Decl. -20.350 (ibex-sun)
error is R.A. +7.334 Decl. +1.068
for a total 6.981 deg
No overlapping commands 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%7C9622532a216c4115270c08d87214c4f0%7Cd6241893512d46dc8d2bbe47e25f5666%7C0%7C0%7C637384780838126802&sdata=7ozXYB4bX%2B3ud0I%2FlEYf1OFyEkPFlHb0fvexTJFr5jI%3D&reserved=0>.
Command Approval Checklist is attached.
Thanks,
Carol
--
Carol Weaver
University of New Hampshire
503.902.8492
From: Nigel Angold <angoldconsulting at earthlink.net>
Date: Monday, 2020-October-26 at 20:20
To: Perry, Timothy E [US] (IS) <Timothy.Perry at ngc.com>
Cc: 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) <IBEX at applieddefense.info>, IBEX Operations <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>, Paul Janzen <Paul.Janzen at mso.umt.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 #507 ATS Approval (10 - 19 Nov 20)
Caution - External Email
I approve IBEX_2020_314_o0507a_BUS_v001.scr and IBEX_2020_314_o0507a_INST_v001.scr. I believe there will be enough room onboard to uplink them during the upcoming apogee contact on 28 October along with the 5 commands in the previously-approved ATS for the orbit 506 star tracker monitoring contact on 2 November.
Nigel
All,
Attached are the planning files for Orbit #507
Please respond to this thread with comments and approvals.
Approvals are required by COB on 27 October 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. 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
# Orbit 507 Battery Balancing
# 2020-11-18T17:20:31.656Z,Perigee,orbit:507
Begin - 2020/11:18:17:00:00 -> End - 2020/11:18:18:30:00
5. Orbit# 505 Reset Master Timer - 2020/11:01:00:50:00
6. Command Load Constraint Violation Report (CCVR)
IBEX_2020_314_o0507a_v001.ccvr
# IBEX_2020_314_o0507a_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 2020/11/10 00:58:45 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2020/11/13 21:41:55 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
<image001.png>
<IBEX_2020_314_o0507a_BUS_v001.ccvr><IBEX_2020_314_o0507a_v001.ccvr><IBEX_2020_314_o0507a_INST_v001.ccvr><IBEX_Orbit507_Contacts.txt><IBEX_2020_314_o0507a_INST_v001.oef><IBEX_2020_314_o0507a_BUS_v001.oef><IBEX_2020_314_o0507a_v001.docx><IBEX_2020_314_o0507a_INST_v001.docx><IBEX_2020_314_o0507a_BUS_v001.docx><IBEX-Command-Approval-Checklist-Rev16_F_507_TEP.docx>
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