[Isocops] IBEX Orbit# 362 ATS (1 Apr 17 - 10 Apr 17) - v001 approval
Ken Fairchild
fair-play at comcast.net
Tue Mar 21 21:46:33 EDT 2017
All,
Note: Angle at orbit 363 apogee after orbit 362 perigee sun precession maneuver: 4.863 deg
I have looked at the orbit 362 ATS,
IBEX_2017_091_o0362a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2017_091_o0362a_v001.ccvr
are from the removal of the
ACT_SetSpinPulseProtectEnable Enable
commands (2); the violations are expected.
The PL commands in the v001 ATS match those in the v002 STF,
IBEX_2017_091_o0362a_v002.stf.
Ascending and descending command sequences are consistent with each other and 15 Re ascending, the apogee maneuver time and 15 Re descending as determined from the OEF,
IBEX_2017_091_o0362a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. The outage starts about 17 hours before 15 Re descending and runs for about 39 hours. Some despinning may be required due to this outage.
There is one moon in Lo FOV session in arc A. The ATS start time is 8+ hours after that in the OEF and the ATS end time is about 4 hours after that in the OEF. These differences are not unusual.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit362_Contacts.txt,
for all contacts (2).
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 orbit 361 left us pointing in safe directions for the orbit 362 arc A ascending and descending sequences:
ibex_rotate -o -u 0.986417,0.154257,0.056449 -w ibex-sun -t 2017/04:02:00:10:44
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.986417,+0.154257,+0.056449
which is R.A. +8.888 Decl. +3.236
missing R.A. +11.240 Decl. +4.809 (ibex-sun)
error is R.A. +2.352 Decl. +1.573
for a total 2.825 deg
ibex_rotate -o -u 0.986417,0.154257,0.056449 -w ibex-sun -t 2017/04:05:12:51:09
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.986417,+0.154257,+0.056449
which is R.A. +8.888 Decl. +3.236
missing R.A. +14.566 Decl. +6.190 (ibex-sun)
error is R.A. +5.678 Decl. +2.954
for a total 6.383 deg
The inertial 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 0.970768,0.22412,0.085904 -w ibex-sun -t 2017/04:05:14:34:17
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.970768,+0.224120,+0.085904
which is R.A. +13.000 Decl. +4.928
missing R.A. +14.632 Decl. +6.218 (ibex-sun)
error is R.A. +1.632 Decl. +1.290
for a total 2.074 deg
ibex_rotate -o -u 0.970768,0.22412,0.085904 -w ibex-sun -t 2017/04:05:16:09:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.970768,+0.224120,+0.085904
which is R.A. +13.000 Decl. +4.928
missing R.A. +14.692 Decl. +6.244 (ibex-sun)
error is R.A. +1.692 Decl. +1.316
for a total 2.137 deg
ibex_rotate -o -u 0.970768,0.22412,0.085904 -w ibex-sun -t 2017/04:10:01:06:44
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.970768,+0.224120,+0.085904
which is R.A. +13.000 Decl. +4.928
missing R.A. +18.571 Decl. +7.883 (ibex-sun)
error is R.A. +5.571 Decl. +2.955
for a total 6.275 deg
The sun precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 363 apogee:
ibex_rotate -o -r +18.658 -d +7.917 -w ibex-sun -t 2017/04:10:03:30:46
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.938415,+0.316869,+0.137738
which is R.A. +18.658 Decl. +7.917
missing R.A. +18.658 Decl. +7.917 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.001 deg
ibex_rotate -o -r +18.658 -d +7.917 -w ibex-sun -t 2017-04-14T23:37:27.783Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.938415,+0.316869,+0.137738
which is R.A. +18.658 Decl. +7.917
missing R.A. +23.244 Decl. +9.682 (ibex-sun)
error is R.A. +4.586 Decl. +1.765
for a total 4.863 deg
No Lo O-mode.
There is no overlap with orbit 361 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi .
Command Approval Checklist is attached.
Ken
----- Original Message -----
From: "Sheral Wesley" <Sheral.Wesley at OrbitalATK.com>
To: "Sheral Wesley" <Sheral.Wesley at OrbitalATK.com>, "David Heirtzler" <dheirtzl at atlas.sr.unh.edu>, "IBEX-FDG" <IBEX.fdg at applieddefense.com>, "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>, "Robert Lockwood" <Robert.Lockwood at OrbitalATK.com>, "Michelle Reno" <mreno at swri.edu>, "Nigel Angold" <nigel.angold at nasa.gov>, "Paul Janzen" <paul.janzen at umontana.edu>, "Timothy Perry" <Timothy.Perry at OrbitalATK.com>, "Ryan Tyler" <Ryan.Tyler at OrbitalATK.com>
Sent: Monday, March 20, 2017 3:03:22 PM
Subject: IBEX Orbit# 362 ATS (1 Apr 17 - 10 Apr 17)
Guys,
Here are the planning files and ATS for Orbit# 362.
Please respond to this email thread with your comments and approvals
Approvals are required by 23 Mar 17 @1200 UTC
Note the following:
1. PERIGEE Battery Balancing
2017-04-10T12:53:11.441Z,Perigee,orbit:362
SetLongEclipseFlag TRUE $TIME=2017/04:10:12:00:00
SetLongEclipseFlag FALSE $TIME=2017/04:10:13:30:00
2. Moon in Lo FOV
2017-04-03T08:46:07.012Z,MoonInLoFovStart,orbit:362
2017-04-04T12:11:00.759Z,MoonInLoFovStop,orbit:362
3. PERIGEE Sun Maneuver
2017-04-10T03:15:46.000Z,ManeuverWindowStart,,orbit:362
2017-04-10T03:15:46.000Z,SunMvrBegin,orbit:362
2017-04-10T03:30:46.000Z,SunMvrEnd,orbit:362
2017-04-10T03:45:48.000Z,ManeuverWindowEnd,orbit:362
4. Command Load Constraint Violation Report
IBEX_2017_091_o0362a_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 2017/04/01 22:37:05 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2017/04/05 15:39:23 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Sheral R. Wesley
Sr Systems Engineer
IBEX Mission OPS
CRS/CYGNUS Mission Planning
Bldg. 2 Room 1337
Office (703) 406-5641
Cell (202) 236-0802
Notice: This e-mail is intended solely for use of the individual or entity to which it is addressed and may contain information that is proprietary, privileged and/or exempt from disclosure under applicable law. If the reader is not the intended recipient or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. This communication may also contain data subject to U.S. export laws. If so, data subject to the International Traffic in Arms Regulation cannot be disseminated, distributed, transferred, or copied, whether incorporated or in its original form, to foreign nationals residing in the U.S. or abroad, absent the express prior approval of the U.S. Department of State. Data subject to the Export Administration Act may not be disseminated, distributed, transferred or copied contrary to U. S. Department of Commerce regulations. If you have received this communication in error, please notify the sender by reply e-mail and destroy the e-mail message and any physical copies made of the communication.
Thank you.
*********************
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