[Isocops] IBEX Orbit# 337 ATS v002 Approval (17 Aug 16 - 25 Aug 16) - v002 approval
Ken Fairchild
fair-play at comcast.net
Sun Aug 7 22:06:36 EDT 2016
All,
I have looked at the orbit 337 ATS,
IBEX_2016_230_o0337a_v002.scr,
and I approve.
The only constraint violations in
IBEX_2016_230_o0337a_v002.ccvr
are because we removed the
ACT_SetSpinPulseProtectEnable Enable
commands (2); the violations are expected.
The PL commands in the v002 ATS match those in the v003 STF,
IBEX_2016_230_o0337a_v003.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_2016_230_o0337a_v001.oef,
and as verified with ibex_orbit.
There are two star tracker outages. The first starts 10 1/2 hours after orbit 336 perigee and ends 13 hours later. The second starts just after perigee and runs for about 6 1/2 hours. Some despinning may be required due to the first outage.
There is one moon in Lo FOV session in arc B. The ATS start time is 9 1/2 hours after that in the OEF (however, during this time the arc A descending sequence, the apogee maneuver and the arc B ascending sequence are executed). The ATS end time is 4 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_Orbit337_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 336 left us pointing in safe directions for the orbit 337 arc A ascending and descending sequences:
ibex_rotate -o -u -0.788417,0.568164,0.23577 -w ibex-sun -t 2016/08:17:13:08:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.788417,+0.568164,+0.235770
which is R.A. +144.222 Decl. +13.637
missing R.A. +147.076 Decl. +13.240 (ibex-sun)
error is R.A. +2.854 Decl. +0.397
for a total 2.804 deg
ibex_rotate -o -u -0.788417,0.568164,0.23577 -w ibex-sun -t 2016/08:20:23:24:55
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.788417,+0.568164,+0.235770
which is R.A. +144.222 Decl. +13.637
missing R.A. +150.221 Decl. +12.116 (ibex-sun)
error is R.A. +5.999 Decl. +1.521
for a total 6.042 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 -0.83106,0.514296,0.211751 -w ibex-sun -t 2016/08:21:01:08:03
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.831060,+0.514296,+0.211751
which is R.A. +148.249 Decl. +12.225
missing R.A. +150.288 Decl. +12.093 (ibex-sun)
error is R.A. +2.039 Decl. +0.132
for a total 1.998 deg
ibex_rotate -o -u -0.83106,0.514296,0.211751 -w ibex-sun -t 2016/08:21:02:43:09
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.831060,+0.514296,+0.211751
which is R.A. +148.249 Decl. +12.225
missing R.A. +150.350 Decl. +12.071 (ibex-sun)
error is R.A. +2.101 Decl. +0.154
for a total 2.060 deg
ibex_rotate -o -u -0.83106,0.514296,0.211751 -w ibex-sun -t 2016/08:25:09:08:14
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.831060,+0.514296,+0.211751
which is R.A. +148.249 Decl. +12.225
missing R.A. +154.374 Decl. +10.638 (ibex-sun)
error is R.A. +6.125 Decl. +1.587
for a total 6.209 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 338 apogee:
ibex_rotate -o -u -0.870501,0.455319,0.18685 -w ibex-sun -t 2016/08:25:11:16:54
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.870501,+0.455319,+0.186850
which is R.A. +152.388 Decl. +10.769
missing R.A. +154.456 Decl. +10.607 (ibex-sun)
error is R.A. +2.068 Decl. +0.162
for a total 2.038 deg
ibex_rotate -o -u -0.870501,0.455319,0.18685 -w ibex-sun -t 2016-08-30T08:41:55.315Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.870501,+0.455319,+0.186850
which is R.A. +152.388 Decl. +10.769
missing R.A. +158.815 Decl. +8.874 (ibex-sun)
error is R.A. +6.427 Decl. +1.895
for a total 6.610 deg
No Lo O-mode.
There is no overlap with orbit 336 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: "Wesley.Sheral" <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>, "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>
Sent: Sunday, August 7, 2016 3:04:32 PM
Subject: IBEX Orbit# 337 ATS v002 Approval (17 Aug 16 - 25 Aug 16)
Guys,
Here is Orbit# 337 v002 ATS.
We have a chance to upload the ATS on the next PERIGEE contact 8 Aug 16 @ 2am EDT
Please send your approvals before 8 Aug 16 @1230 am EDT or the ATS will be uploaded at APOGEE
Note the following changes
1. Moon in Lo FOV Commands
Orbit# 337 APOGEE: Moon in Lo FOV Commands
# 2016-08-20T17:39:03.131Z,MoonInLoFovStart,orbit:337
# 2016-08-22T04:35:45.140Z,MoonInLoFovStop,orbit:337
2. Command Load Constraint Violation Report
IBEX_2016_230_o0337a_v002.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 2016/08/17 11:45:20 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2016/08/21 02:13:09 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
From: Wesley.Sheral
Sent: Thursday, August 04, 2016 12:25 PM
To: David Heirtzler; IBEX-FDG; IBEXOPS; ISOC; Ken Fairchild; Lockwood.Robert; Michelle Reno; Nigel Angold; Paul Janzen; Perry.Tim; Tyler.Ryan; Wesley.Sheral
Subject: IBEX Orbit# 337 ATS Approval (17 Aug 16 - 25 Aug 16)
Guys,
Here are the planning products and ATS for Orbit# 337.
Please respond to this email thread with your comments and approvals
Approvals are required before 6 Aug 16 @ 1800 UTC
Note the following:
1. PERIGEE Battery Balancing
Orbit# 337 PERIGEE: Battery Balancing
# 2016-08-25T21:09:19.742Z,Perigee,orbit:337
SetLongEclipseFlag TRUE $TIME=2016/08:25:20:00:00
SetLongEclipseFlag FALSE $TIME=2016/08:25:21:30:00
2. Command Load Constraint Violation Report
IBEX_2016_230_o0337a_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 2016/08/17 11:45:20 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2016/08/21 02:13:09 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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