[Isocops] IBEX ORbit# 331 ATS Approval (23 June 16 - 2 July 16) - v003 approval
Ken Fairchild
fair-play at comcast.net
Mon Jun 13 07:52:04 EDT 2016
All,
I have looked at the orbit 331 ATS,
IBEX_2016_175_o0331a_v003.scr,
and I approve.
The only constraint violations in
IBEX_2016_175_o0331a_v003.ccvr
are because we removed the
ACT_SetSpinPulseProtectEnable Enable
commands (2); the violations are expected.
The PL commands in the v003 ATS match those in the v002 STF,
IBEX_2016_175_o0331a_v002.stf,
except that the ATS has an SSR_DUMP_NEW command as well as SSR pointer reset commands. 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_175_o0331a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. It starts about 3 1/2 hours before perigee and ends about an hour after perigee. No despinning should be required due to this outage.
There is one moon in Lo FOV session in arc A. The ATS start time is about 5 hours after that in the OEF and the ATS end time is 2+ 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_Orbit331_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 inertial maneuver at perigee of orbit 330 left us pointing in safe directions for the orbit 331 arc A ascending and descending sequences:
ibex_rotate -o -u -0.001479,0.921313,0.388818 -w ibex-sun -t 2016/06:24:01:45:19
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.001479,+0.921313,+0.388818
which is R.A. +90.092 Decl. +22.881
missing R.A. +92.974 Decl. +23.395 (ibex-sun)
error is R.A. +2.882 Decl. +0.514
for a total 2.699 deg
ibex_rotate -o -u -0.001479,0.921313,0.388818 -w ibex-sun -t 2016/06:27:15:45:54
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.001479,+0.921313,+0.388818
which is R.A. +90.092 Decl. +22.881
missing R.A. +96.762 Decl. +23.257 (ibex-sun)
error is R.A. +6.670 Decl. +0.376
for a total 6.148 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 -0.075693,0.918906,0.387145 -w ibex-sun -t 2016/06:27:17:29:02
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.075693,+0.918906,+0.387145
which is R.A. +94.709 Decl. +22.777
missing R.A. +96.838 Decl. +23.254 (ibex-sun)
error is R.A. +2.129 Decl. +0.477
for a total 2.017 deg
ibex_rotate -o -u -0.075693,0.918906,0.387145 -w ibex-sun -t 2016/06:27:19:04:08
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.075693,+0.918906,+0.387145
which is R.A. +94.709 Decl. +22.777
missing R.A. +96.908 Decl. +23.252 (ibex-sun)
error is R.A. +2.199 Decl. +0.475
for a total 2.079 deg
ibex_rotate -o -u -0.075693,0.918906,0.387145 -w ibex-sun -t 2016/07:02:04:21:53
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.075693,+0.918906,+0.387145
which is R.A. +94.709 Decl. +22.777
missing R.A. +101.454 Decl. +23.036 (ibex-sun)
error is R.A. +6.745 Decl. +0.259
for a total 6.218 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 332 apogee:
ibex_rotate -o -u -0.152111,0.91064,0.384183 -w ibex-sun -t 2016/07:02:06:31:20
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.152111,+0.910640,+0.384183
which is R.A. +99.483 Decl. +22.593
missing R.A. +101.541 Decl. +23.029 (ibex-sun)
error is R.A. +2.058 Decl. +0.436
for a total 1.947 deg
ibex_rotate -o -u -0.152111,0.91064,0.384183 -w ibex-sun -t 2016-07-07T07:25:01.919Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.152111,+0.910640,+0.384183
which is R.A. +99.483 Decl. +22.593
missing R.A. +106.718 Decl. +22.517 (ibex-sun)
error is R.A. +7.235 Decl. +0.076
for a total 6.682 deg
No Lo O-mode.
There is no overlap with orbit 330 command 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>, "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: Friday, June 10, 2016 12:20:13 PM
Subject: IBEX ORbit# 331 ATS Approval (23 June 16 - 2 July 16)
Guys,
Here are the planning files and ATS for Orbit# 331.
Please respond to this email thread with your comments, questions and approvals
Approvals are required before 13 June 16 @1000 UTC
Note the following:
1. No command to enable spin pulse protection
2. Moon in LO FOV commands
# 2016-06-24T22:41:40.857Z,MoonInLoFovStart,orbit:331
# 2016-06-25T14:26:28.311Z,MoonInLoFovStop,orbit:331
3. PERIGEE: Battery Balancing Commands
# 2016-07-02T16:16:37.231Z,Perigee,orbit:331
SetLongEclipseFlag TRUE $TIME=2016/07:02:16:00:00
SetLongEclipseFlag FALSE $TIME=2016/07:02:17:30:00
4. PERIGEE: APL SSR_Dump/Tracking Contact
5. Command Load Constraint Violation Report
IBEX_2016_175_o0331a_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 2016/06/24 00:16:15 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2016/06/27 18:34:08 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
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