[Isocops] IBEX Orbit #508 ATS Approval (19 - 28 Nov 20)
Weaver, Carol
Carol.Weaver at unh.edu
Fri Nov 6 15:43:22 EST 2020
Hi all,
I approve IBEX_2020_323_o0508a_BUS_v001.scr, IBEX_2020_323_o0508a_INST_v001.scr
Constraint violations: IBEX_2020_323_o0508a_INST_v001.ccvr, IBEX_2020_323_o0508a_BUS_v001.ccvrhave the 2 expected violations from removal of ACT_SetSpinPulseProtectEnable
PL commands in IBEX_2020_323_o0508a_INST_v001.scr match those in IBEX_2020_323_o0508a_v002.stf
Star Tracker Outage: 1 outage that occurs after the 508 apogee maneuver and lasts for ~19 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit508_Contacts.txt for the (3) contacts.
No battery cell balancing this orbit.
The inertial maneuver at perigee of 507 left us pointing in a safe direction for the orbit 508 arc A ascending and descending sequences:
ibex_rotate -o -u -0.58704,-0.739148,-0.330218 -w ibex-sun -t 2020/11:19:03:34:04
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. +234.718 Decl. -19.509 (ibex-sun)
error is R.A. +3.175 Decl. +0.227
for a total 3.003 deg
ibex_rotate -o -u -0.58704,-0.739148,-0.330218 -w ibex-sun -t 2020/11:22:17:43:07
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. +238.401 Decl. -20.263 (ibex-sun)
error is R.A. +6.858 Decl. +0.981
for a total 6.528 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 -0.520271,-0.779494,-0.348866 -w ibex-sun -t 2020/11:22:18:53:05
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.520271,-0.779494,-0.348866
which is R.A. +236.279 Decl. -20.418
missing R.A. +238.452 Decl. -20.272 (ibex-sun)
error is R.A. +2.173 Decl. +0.146
for a total 2.042 deg
ibex_rotate -o -u -0.520271,-0.779494,-0.348866 -w ibex-sun -t 2020/11:22:20:28:11
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.520271,-0.779494,-0.348866
which is R.A. +236.279 Decl. -20.418
missing R.A. +238.520 Decl. -20.284 (ibex-sun)
error is R.A. +2.241 Decl. +0.134
for a total 2.106 deg
ibex_rotate -o -u -0.520271,-0.779494,-0.348866 -w ibex-sun -t 2020/11:27:05:10:08
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.520271,-0.779494,-0.348866
which is R.A. +236.279 Decl. -20.418
missing R.A. +243.185 Decl. -21.133 (ibex-sun)
error is R.A. +6.906 Decl. +0.715
for a total 6.496 deg
The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 509 apogee:
ibex_rotate -o -u -0.452865,-0.814406,-0.362845 -w ibex-sun -t 2020/11:27:08:00:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.452865,-0.814406,-0.362845
which is R.A. +240.923 Decl. -21.275
missing R.A. +243.319 Decl. -21.160 (ibex-sun)
error is R.A. +2.396 Decl. +0.115
for a total 2.237 deg
ibex_rotate -o -u -0.452865,-0.814406,-0.362845 -w ibex-sun -t 2020-12-02T04:48:28
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.452865,-0.814406,-0.362845
which is R.A. +240.923 Decl. -21.275
missing R.A. +248.513 Decl. -21.956 (ibex-sun)
error is R.A. +7.590 Decl. +0.681
for a total 7.088 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=04%7C01%7Ccarol.weaver%40unh.edu%7C6078aca1a75444141ccc08d87abede0c%7Cd6241893512d46dc8d2bbe47e25f5666%7C0%7C0%7C637394307484459800%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=9tGJua0c8L5nUVWewG1yGDuqcMq2PAt04V3yFc9wYsY%3D&reserved=0>.
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, 2020-November-2 at 11:29
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) <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 mso.umt.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 #508 ATS Approval (19 - 28 Nov 20)
Caution - External Email
All,
Attached are the planning files for Orbit #508
Please respond to this thread with comments and approvals.
Approvals are required by COB on 06 November 2020
1. >>>To reduce the number hand edits in an ATS. I am incorporating the use of an ABS file for inserting both battery balancing and 18 day timer reset commands. <<<
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. No Battery Balancing this orbit
1. # Orbit# 506 Reset Master Timer - 2020/11:09:23:15:00
1. Command Load Constraint Violation Report (CCVR)
IBEX_2020_323_o0508a_v001.ccvr
# Input files: 1
# IBEX_2020_323_o0508a_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 2020/11/19 01:11:12 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2020/11/22 19:58:11 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
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 01D6B44B.2BE91210]
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