[Isocops] IBEX Orbit# 386 ATS Approval (5 Nov 17 - 14 Nov 17) - v001 approval
Ken Fairchild
fair-play at comcast.net
Fri Oct 27 00:43:36 EDT 2017
All,
I have looked at the orbit 386 ATS,
IBEX_2017_309_o0386a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2017_309_o0386a_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_309_o0386a_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_309_o0386a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. It starts near 15 Re descending in orbit 385 and runs for 1+ days. Some despinning may be required due to this outage.
There is one moon in Lo FOV session in arc B. The ATS start time is about 2 hours after that in the OEF and the ATS end time is about 2 1/2 hours before 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_Orbit386_Contacts.txt,
for all contacts (3).
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 385 left us pointing in safe directions for the orbit 386 arc A ascending and descending sequences:
ibex_rotate -o -r +220.166 -d -15.600 -w ibex-sun -t 2017/11:05:22:21:28
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.736029,-0.621244,-0.268920
which is R.A. +220.166 Decl. -15.600
missing R.A. +221.019 Decl. -15.901 (ibex-sun)
error is R.A. +0.853 Decl. +0.301
for a total 0.875 deg
ibex_rotate -o -r +220.166 -d -15.600 -w ibex-sun -t 2017/11:09:14:36:44
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.736029,-0.621244,-0.268920
which is R.A. +220.166 Decl. -15.600
missing R.A. +224.576 Decl. -16.951 (ibex-sun)
error is R.A. +4.410 Decl. +1.351
for a total 4.444 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 -0.704904,-0.646605,-0.29157 -w ibex-sun -t 2017/11:09:16:19:52
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.704904,-0.646605,-0.291570
which is R.A. +222.530 Decl. -16.952
missing R.A. +224.647 Decl. -16.970 (ibex-sun)
error is R.A. +2.117 Decl. +0.018
for a total 2.025 deg
ibex_rotate -o -u -0.704904,-0.646605,-0.29157 -w ibex-sun -t 2017/11:09:17:54:58
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.704904,-0.646605,-0.291570
which is R.A. +222.530 Decl. -16.952
missing R.A. +224.713 Decl. -16.988 (ibex-sun)
error is R.A. +2.183 Decl. +0.036
for a total 2.088 deg
ibex_rotate -o -u -0.704904,-0.646605,-0.29157 -w ibex-sun -t 2017/11:14:05:47:10
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.704904,-0.646605,-0.291570
which is R.A. +222.530 Decl. -16.952
missing R.A. +229.380 Decl. -18.189 (ibex-sun)
error is R.A. +6.850 Decl. +1.237
for a total 6.646 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 387 apogee:
ibex_rotate -o -u -0.645818,-0.696712,-0.312269 -w ibex-sun -t 2017/11:14:08:15:43
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.645818,-0.696712,-0.312269
which is R.A. +227.171 Decl. -18.196
missing R.A. +229.493 Decl. -18.220 (ibex-sun)
error is R.A. +2.322 Decl. +0.024
for a total 2.206 deg
ibex_rotate -o -u -0.645818,-0.696712,-0.312269 -w ibex-sun -t 2017-11-19T07:06:08.000Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.645818,-0.696712,-0.312269
which is R.A. +227.171 Decl. -18.196
missing R.A. +234.507 Decl. -19.462 (ibex-sun)
error is R.A. +7.336 Decl. +1.266
for a total 7.057 deg
No Lo O-mode.
There is no overlap with orbit 385 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: "Eric Chubin" <Eric.Chubin at OrbitalATK.com>, "Colin Joyce" <cjl46 at wildcats.unh.edu>, "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" <kwfairchild at gmail.com>, "Ken Fairchild" <fair-play at comcast.net>, "Robert Lockwood" <Robert.Lockwood at OrbitalATK.com>, "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>, "Sheral Wesley" <Sheral.Wesley at OrbitalATK.com>
Sent: Wednesday, October 25, 2017 11:19:58 AM
Subject: IBEX Orbit# 386 ATS Approval (5 Nov 17 - 14 Nov 17)
Guys,
Here are the planning files and ATS for Orbit# 386.
Please respond to this email thread with your comments and approvals
Approvals are required before 26 Oct @1800 UTC
Note the following:
1. The OEF is longer than usual because of the PERIGEE sun maneuver in Orbit# 385.
2. The EPH v002 file was generated because of the PERIGEE sun maneuver in Orbit# 385.
3. Moon in LO FOV commands
2017-11-10T15:47:35.221Z,MoonInLoFovStart,orbit:386
2017-11-11T21:25:20.759Z,MoonInLoFovStop,orbit:386
4. Battery Balancing Commands
# 2017-11-14T17:13:49.583Z,Perigee,orbit:386
SetLongEclipseFlag TRUE $TIME=2017/11:14:16:00:00
SetLongEclipseFlag FALSE $TIME=2017/11:14:17:30:00
5. Command Load Constraint Violation Report
IBEX_2017_309_o0386a_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 2017/11/05 20:37:11 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2017/11/09 17:24:58 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Sheral R. Wesley
Sr Systems Engineer
IBEX , OCO2 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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