[Isocops] EXT :Re: IBEX Orbit #510 ATS Approval (7 – 16 Dec 20)
Perry, Timothy E [US] (IS)
Timothy.Perry at ngc.com
Fri Nov 20 16:33:28 EST 2020
Nigel,
We do normally see this error when there is an eclipse. I have to check some more from previous eclipses. I will be back in on Sunday for the apogee pass. I will do some more checking then. But, the ATS is good.
BTW
I haven’t see an approval for the orbit 509 LGC ATS from the Lo team yet. Have you seen anything from them?
Tim
Sent from my iPad
On Nov 20, 2020, at 10:56 AM, Nigel Angold <angoldconsulting at earthlink.net> wrote:
Hi Tim. Moving the orbit 510 load to the perigee passes to accommodate the orbit 509 LGC is fine. But I am concerned about the constraint violation message due to the eclipse:
IBX-CLC-015: Battery charge falls below minimum from 2020/12/06 18:30:00 UTC -
2020/12/15 23:32:00 UTC. Lowest charge level is 0.000000
watt-minutes during this interval.
I am assuming that this violation is because of the eclipse. I am not sure why the duration is the length of the orbit.
Do you think this is an MPS problem?
FYI
2020/12/0618:30:00 UTC is the time of the @ECT_SetLongEclipseFlag FALSE command at the end of orbit 509.
And 2020/12/15 23:32:00 UTC is the time of the last command (@ECT_SetRelay stx,off) in orbit 510.
Thanks,
Nigel
All,
Attached are the planning files for Orbit #510
Please respond to this thread with comments and approvals.
Approvals are required by COB on 26 November 2020
Please note the following:
1. Please note that I am moving out the date for sign off to the perigee passes. I plan to uplink the Orbit 509 LGC ATS during the apogee pass on Nov 22.
2. The Apogee pass had to be changed. With the new ephemeris the original view period disappeared
IBEX,USHI01,DELETE,12/12/20,347,02:30:00,12/12/20,347,03:05:00,LAHO 2K IBEX-2 Orbit# 510 Apogee Tracking Contact 42re Desc
IBEX,USHI01,ADD,12/13/20,348,00:30:00,12/13/20,348,01:05:00,LAHO 2K IBEX-2 Orbit# 510 Apogee Tracking Contact 42re Desc
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.
6. Eclipse – Eclipse Duration 2020-12-15T12:37:55.730Z,PenumbraEntry,orbit:510 - 2020-12-15T14:00:41.598Z,PenumbraExit,orbit:510
Long eclipse flag 2020/12:15:10:45:00 True - 2020/12:15:14:10:00 False
7. Orbit# 510 Reset Master Timer - 2020/11:28:00:15:00
8. Command Load Constraint Violation Report (CCVR)
IBEX_2020_341_o0510a_v001.ccvr
# Input files: 1
# IBEX_2020_341_o0510a_v001.scr
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
IBX-CLC-006: Planned transmission at 2020/12/15 10:28:00 UTC - 2020/12/15
12:02:00 UTC exceeds the maximum contiguous transmission time of
5400 seconds
The reason for this violation is that we add 2 minutes before and after the scheduled time. So, the additional 4 minutes creates the violation.
IBEX,USAK01,ADD,12/15/20,350,10:30:00,12/15/20,350,12:00:00,LAHO 64K IBEX-2 Orbit# 510 Pre-Eclipse Monitor Contact 14 Desc
IBX-CLC-015: Battery charge falls below minimum from 2020/12/06 18:30:00 UTC -
2020/12/15 23:32:00 UTC. Lowest charge level is 0.000000
watt-minutes during this interval.
I am assuming that this violation is because of the eclipse. I am not sure why the duration is the length of the orbit.
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2020/12/07 01:46:26 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2020/12/12 02:37:37 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_Orbit510_Contacts.txt><IBEX_2020_341_o0510a_BUS_v001.docx><IBEX_2020_341_o0510a_v001.docx><IBEX_2020_341_o0510a_INST_v001.docx><IBEX_2020_341_o0510a_v001.ccvr><IBEX_2020_341_o0510a_INST_v001.ccvr><IBEX_2020_341_o0510a_BUS_v001.ccvr><IBEX_2020_341_o0510a_BUS_v001.oef><IBEX_2020_341_o0510a_INST_v001.oef>
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