[Isocops] IBEX ORbit# 347 ATS Approval (14 Nov 16 - 23 Nov 16) - v001 approval
Ken Fairchild
fair-play at comcast.net
Wed Nov 2 10:40:10 EDT 2016
All,
I have looked at the orbit 347 ATS,
IBEX_2016_319_o0347a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2016_319_o0347a_v001.ccvr
are because we removed the
ACT_SetSpinPulseProtectEnable Enable
commands (2); the violations are expected.
The PL commands in the v001 ATS match those in the v002 STF,
IBEX_2016_319_o0347a_v002.stf,
except that the ATS has an SSR_DUMP_NEW command . This is expected as APL is being used for the dump pass.
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_2016_319_o0347a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. It starts at orbit 346 apogee and runs until about a day after 15 Re ascending. 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 3 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_Orbit347_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 346 left us pointing in safe directions for the orbit 347 arc A ascending and descending sequences:
ibex_rotate -o -r +229.377 -d -18.194 -w ibex-sun -t 2016/11:14:19:58:46
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.618528,-0.721063,-0.312235
which is R.A. +229.377 Decl. -18.194
missing R.A. +230.276 Decl. -18.454 (ibex-sun)
error is R.A. +0.899 Decl. +0.260
for a total 0.892 deg
ibex_rotate -o -r +229.377 -d -18.194 -w ibex-sun -t 2016/11:18:13:03:30
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.618528,-0.721063,-0.312235
which is R.A. +229.377 Decl. -18.194
missing R.A. +233.984 Decl. -19.358 (ibex-sun)
error is R.A. +4.607 Decl. +1.164
for a total 4.515 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 -0.581736,-0.742102,-0.332968 -w ibex-sun -t 2016/11:18:14:46:38
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.581736,-0.742102,-0.332968
which is R.A. +231.907 Decl. -19.449
missing R.A. +234.058 Decl. -19.374 (ibex-sun)
error is R.A. +2.151 Decl. +0.075
for a total 2.030 deg
ibex_rotate -o -u -0.581736,-0.742102,-0.332968 -w ibex-sun -t 2016/11:18:16:21:44
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.581736,-0.742102,-0.332968
which is R.A. +231.907 Decl. -19.449
missing R.A. +234.126 Decl. -19.389 (ibex-sun)
error is R.A. +2.219 Decl. +0.060
for a total 2.093 deg
ibex_rotate -o -u -0.581736,-0.742102,-0.332968 -w ibex-sun -t 2016/11:23:04:45:03
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.581736,-0.742102,-0.332968
which is R.A. +231.907 Decl. -19.449
missing R.A. +238.946 Decl. -20.354 (ibex-sun)
error is R.A. +7.039 Decl. +0.905
for a total 6.680 deg
The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 348 apogee:
ibex_rotate -o -u -0.514158,-0.783058,-0.349946 -w ibex-sun -t 2016/11:23:07:08:14
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.514158,-0.783058,-0.349946
which is R.A. +236.711 Decl. -20.484
missing R.A. +239.059 Decl. -20.377 (ibex-sun)
error is R.A. +2.348 Decl. +0.107
for a total 2.203 deg
ibex_rotate -o -u -0.514158,-0.783058,-0.349946 -w ibex-sun -t 2016-11-28T06:36:58.694Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.514158,-0.783058,-0.349946
which is R.A. +236.711 Decl. -20.484
missing R.A. +244.265 Decl. -21.361 (ibex-sun)
error is R.A. +7.554 Decl. +0.877
for a total 7.110 deg
No Lo O-mode.
There is no overlap with orbit 346 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: "Wesley.Sheral" <sheral.wesley at orbitalatk.com>
To: "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>, "Lockwood.Robert" <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>, "Perry.Tim" <tim.perry at orbitalatk.com>, "Tyler.Ryan" <ryan.tyler at orbitalatk.com>, "Wesley.Sheral" <sheral.wesley at orbitalatk.com>
Sent: Tuesday, November 1, 2016 3:20:44 AM
Subject: IBEX ORbit# 347 ATS Approval (14 Nov 16 - 23 Nov 16)
Guys,
Here are the planning products and ATS for Orbit# 347.
Please respond to this email thread with your comments and approvals
Approvals are required before 4 Nov 16 @1200 UTC
Note the following:
1. Battery Balancing at Perigee
# 2016-11-23T16:19:02.270Z,Perigee,orbit:347
SetLongEclipseFlag TRUE $TIME=2016/11:23:16:00:00
SetLongEclipseFlag FALSE $TIME=2016/11:23:17:30:00
2. APL-18 SSR_Dump/Tracking Contact
3. Moon in Lo FOV Commands
2016-11-20T13:57:33.739Z,MoonInLoFovStart,orbit:347
# 2016-11-21T17:43:00.355Z,MoonInLoFovStop,orbit:347
4. OEF Generation
The OEF was started in Orbit# 345 due to the PERIGEE sun maneuver in Orbit# 346
5. Command Load Constraint Violation Report
IBEX_2016_319_o0347a_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 2016/11/14 18:16:51 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2016/11/18 15:51:44 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Sheral R. Wesley
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 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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