[Isocops] IBEX ORbit# 336 ATS Approval (8 Aug 16 - 17 Aug 16) - v001 approval

Fri Jul 29 02:05:42 EDT 2016

All, 

I have looked at the orbit 336 ATS, 

IBEX_2016_221_o0336a_v001.scr, 

and I approve. 

The only constraint violations in 

IBEX_2016_221_o0336a_v001.ccvr 

are because of the eclipse and because we removed the 

ACT_SetSpinPulseProtectEnable Enable 

commands (2); the violations are expected. 

The PL commands in the v001 ATS match those in the v004 STF, 

IBEX_2016_221_o0336a_v004.stf. 

Ascending and descending command sequences are consistent with each other and 15 Re ascending, the apogee maneuver time, the eclipse time and 15 Re descending as determined from the crossing times report, 

IBEX_CrossingTimes_2016_202_23_48_v001.txt, 

and as verified with ibex_orbit. 

There are two overlapping star tracker outages. The first starts about 2 1/2 hours before perigee. The second starts during the first one and ends about 13 hours after the first one begins. No despinning should be required due to these outages. 

There is one moon in Lo FOV session in arc B. The ATS start time is about 1 1/2 hours after that in the OEF. This difference is not unusual. The session ends before the post-eclipse ascending sequence completion time so explicit session end commands do not appear in the ATS. 

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, 

IBEX_Orbit336_Contacts.txt, 

for all contacts (3). 

The LE flag on/off commands follow Ryan's recommendations and the eclipse descending/ascending sequences are offset from the LE set/unset commands by the required 2 hours. 

The inertial maneuver at perigee of orbit 335 left us pointing in safe directions for the orbit 336 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.688092,0.669538,0.279728 -w ibex-sun -t 2016/08:08:14:33:12 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.688092,+0.669538,+0.279728 

which is R.A. +135.783 Decl. +16.244 

missing R.A. +138.661 Decl. +15.962 (ibex-sun) 

error is R.A. +2.878 Decl. +0.282 

for a total 2.779 deg 

ibex_rotate -o -u -0.688092,0.669538,0.279728 -w ibex-sun -t 2016/08:12:02:29:57 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.688092,+0.669538,+0.279728 

which is R.A. +135.783 Decl. +16.244 

missing R.A. +141.955 Decl. +14.924 (ibex-sun) 

error is R.A. +6.172 Decl. +1.320 

for a total 6.089 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 -0.739557,0.621575,0.258263 -w ibex-sun -t 2016/08:12:04:13:05 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.739557,+0.621575,+0.258263 

which is R.A. +139.954 Decl. +14.967 

missing R.A. +142.023 Decl. +14.903 (ibex-sun) 

error is R.A. +2.070 Decl. +0.064 

for a total 2.001 deg 

ibex_rotate -o -u -0.739557,0.621575,0.258263 -w ibex-sun -t 2016/08:12:05:48:11 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.739557,+0.621575,+0.258263 

which is R.A. +139.954 Decl. +14.967 

missing R.A. +142.087 Decl. +14.883 (ibex-sun) 

error is R.A. +2.133 Decl. +0.084 

for a total 2.063 deg 

ibex_rotate -o -u -0.739557,0.621575,0.258263 -w ibex-sun -t 2016/08:16:13:10:32 

Quaternion +0.000000,+0.000000,+0.000000,+0.000000 

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.739557,+0.621575,+0.258263 

which is R.A. +139.954 Decl. +14.967 

missing R.A. +146.214 Decl. +13.573 (ibex-sun) 

error is R.A. +6.260 Decl. +1.394 

for a total 6.225 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 337 apogee: 

ibex_rotate -o -u -0.788417,0.568164,0.23577 -w ibex-sun -t 2016/08:16:15:15:52 

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. +146.294 Decl. +13.545 (ibex-sun) 

error is R.A. +2.072 Decl. +0.092 

for a total 2.016 deg 

ibex_rotate -o -u -0.788417,0.568164,0.23577 -w ibex-sun -t 2016-08-21T10:58:44.911Z 

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. +150.674 Decl. +11.958 (ibex-sun) 

error is R.A. +6.452 Decl. +1.679 

for a total 6.511 deg 

No Lo O-mode. 

There is no overlap with orbit 335 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>, "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: Wednesday, July 27, 2016 11:45:30 AM 
Subject: IBEX ORbit# 336 ATS Approval (8 Aug 16 - 17 Aug 16) 

Guys, 

Here are the planning files and ATS for Orbit# 336. 

Please respond to this email thread with your comments and approvals 

Approvals are required before 28 Jul 16 @2300 UTC 

Note the following: 

1. Moderate Eclipse: Min voltage is 3.65V 

# Orbit# 336 APOGEE: Moderate Eclipse 

# 2016-08-14T14:57:05.592Z,PenumbraEntry,orbit:336 

# 2016-08-14T14:57:05.592Z,EclipseEntry,moderate:true,long:false,orbit:336 

# 2016-08-14T15:50:10.603Z,MoonInLoFovStop,orbit:336 

# 2016-08-14T18:10:37.329Z,PenumbraExit,orbit:336 

# 2016-08-14T18:10:37.329Z,EclipseExit,moderate:true,long:false,orbit:336 

SetLongEclipseFlag TRUE $TIME=2016/08:14:12:57:00 

SetLongEclipseFlag FALSE $TIME=2016/08:14:18:10:00 

2. Moon in Lo FOV 

Orbit# 336 APOGEE: Moon in Lo FOV Commands 

# 2016-08-13T19:36:58.994Z,MoonInLoFovStart,orbit:336 

# 2016-08-14T15:50:10.603Z,MoonInLoFovStop,orbit:336 

3. Command Load Constraint Violation Report 

IBEX_2016_221_o0336a_v001.scr 

========================== 

HARD CONSTRAINT VIOLATIONS 

========================== 

NO VIOLATIONS. 

========================== 

SOFT CONSTRAINT VIOLATIONS 

========================== 

IBX-CLC-015: Battery charge falls below minimum from 2016/08/14 15:51:05 UTC - 

2016/08/14 23:16:12 UTC. Lowest charge level is 0.000000 

watt-minutes during this interval. 

*Moderate Eclipse* 

# 2016-08-14T14:57:05.592Z,PenumbraEntry,orbit:336 

# 2016-08-14T14:57:05.592Z,EclipseEntry,moderate:true,long:false,orbit:336 

# 2016-08-14T15:50:10.603Z,MoonInLoFovStop,orbit:336 

# 2016-08-14T18:10:37.329Z,PenumbraExit,orbit:336 

# 2016-08-14T18:10:37.329Z,EclipseExit,moderate:true,long:false,orbit:336 

IBX-CLC-016: No command to enable spin pulse protection was found after 

transition to science mode at 2016/08/08 13:07:56 UTC 

IBX-CLC-016: No command to enable spin pulse protection was found after 

transition to science mode at 2016/08/12 05:18:11 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, that data subject to the International Traffic in Arms Regulation cannot be disseminated, distributed or copied to foreign nationals, residing in the U.S. or abroad, absent the express prior approval of the U.S. Department of State. 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. 
********** ********** 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sr.unh.edu/pipermail/isocops/attachments/20160729/3692cbe2/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 2392 bytes
Desc: image001.jpg
URL: <http://lists.sr.unh.edu/pipermail/isocops/attachments/20160729/3692cbe2/image001-0001.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev16b-o0336_KWF.doc
Type: application/msword
Size: 121856 bytes
Desc: not available
URL: <http://lists.sr.unh.edu/pipermail/isocops/attachments/20160729/3692cbe2/IBEX-Command-Approval-Checklist-Rev16b-o0336_KWF-0001.doc>