[Isocops] IBEX ORbit# 370 ATS Approval (11 Jun 17 - 20 Jun 17) - v001 approval

Ken Fairchild fair-play at comcast.net
Tue May 30 23:07:16 EDT 2017


All, 

I have looked at the orbit 370 ATS, 



IBEX_2017_162_o0370a_v001.scr, 




and I approve. 




The only constraint violations in 




IBEX_2017_162_o0370a_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_162_o0370a_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_162_o0370a_v001.oef, 




and as verified with ibex_orbit. 




There is one star tracker outage. The outage starts about 4 hours before perigee and ends about 1/2 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 1/2 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_Orbit370_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 369 left us pointing in safe directions for the orbit 370 arc A ascending and descending sequences: 




ibex_rotate -o -u 0.196946,0.903278,0.381183 -w ibex-sun -t 2017/06:12:08:20:00 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.196946,+0.903278,+0.381183 

which is R.A. +77.700 Decl. +22.407 

missing R.A. +80.529 Decl. +23.131 (ibex-sun) 

error is R.A. +2.828 Decl. +0.724 

for a total 2.707 deg 




ibex_rotate -o -u 0.196946,0.903278,0.381183 -w ibex-sun -t 2017/06:15:20:03:14 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.196946,+0.903278,+0.381183 

which is R.A. +77.700 Decl. +22.407 

missing R.A. +84.230 Decl. +23.301 (ibex-sun) 

error is R.A. +6.530 Decl. +0.894 

for a total 6.082 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 0.124848,0.914377,0.385133 -w ibex-sun -t 2017/06:15:21:46:22 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.124848,+0.914377,+0.385133 

which is R.A. +82.225 Decl. +22.652 

missing R.A. +84.305 Decl. +23.305 (ibex-sun) 

error is R.A. +2.080 Decl. +0.653 

for a total 2.023 deg 




ibex_rotate -o -u 0.124848,0.914377,0.385133 -w ibex-sun -t 2017/06:15:23:21:28 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.124848,+0.914377,+0.385133 

which is R.A. +82.225 Decl. +22.652 

missing R.A. +84.375 Decl. +23.308 (ibex-sun) 

error is R.A. +2.150 Decl. +0.656 

for a total 2.085 deg 




ibex_rotate -o -u 0.124848,0.914377,0.385133 -w ibex-sun -t 2017/06:20:07:17:52 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.124848,+0.914377,+0.385133 

which is R.A. +82.225 Decl. +22.652 

missing R.A. +88.860 Decl. +23.454 (ibex-sun) 

error is R.A. +6.635 Decl. +0.802 

for a total 6.157 deg 




The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 371 apogee: 




ibex_rotate -o -u 0.049157,0.920145,0.388481 -w ibex-sun -t 2017/06:20:09:29:26 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.049157,+0.920145,+0.388481 

which is R.A. +86.942 Decl. +22.860 

missing R.A. +88.949 Decl. +23.454 (ibex-sun) 

error is R.A. +2.007 Decl. +0.594 

for a total 1.938 deg 




ibex_rotate -o -u 0.049157,0.920145,0.388481 -w ibex-sun -t 2017-06-25T09:37:42.214Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.049157,+0.920145,+0.388481 

which is R.A. +86.942 Decl. +22.860 

missing R.A. +94.168 Decl. +23.358 (ibex-sun) 

error is R.A. +7.226 Decl. +0.498 

for a total 6.664 deg 




No Lo O-mode. 




There is no overlap with orbit 369 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: "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>, "Robert Lockwood" <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>, "Timothy Perry" <Timothy.Perry at OrbitalATK.com>, "Ryan Tyler" <Ryan.Tyler at OrbitalATK.com>, "Sheral Wesley" <Sheral.Wesley at OrbitalATK.com> 
Sent: Monday, May 29, 2017 11:38:25 PM 
Subject: IBEX ORbit# 370 ATS Approval (11 Jun 17 - 20 Jun 17) 



Guys, 

Here are the planning products and ATS for Orbit# 370. 

Please respond to this email thread with your comments and approvals. 

Approvals are required before 31 May 17 @2100 UTC 



Note the following: 

1. Perigee Battery Balancing 

2017-06-20T19:12:48.401Z,Perigee,orbit:370 

SetLongEclipseFlag TRUE $TIME=2017/06:20:22:00:00 

SetLongEclipseFlag FALSE $TIME=2017/06:20:23:30:00 



2. Moon in Lo FOV Commands 

2017-06-13T20:19:42.805Z,MoonInLoFovStart,orbit:370 

2017-06-14T13:50:17.710Z,MoonInLoFovStop,orbit:370 



3. Command Load Constraint Violation Report 

IBEX_2017_162_o0370a_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 2017/06/12 06:54:46 UTC 

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

transition to science mode at 2017/06/15 22:51:28 UTC 



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

OTHER MESSAGES 

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

NO MESSAGES. 





Sheral R. Wesley 

Sr Systems Engineer 

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/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. 
********************* 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sr.unh.edu/pipermail/isocops/attachments/20170531/bd806a2a/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/20170531/bd806a2a/image001-0001.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev16b-o0370_KWF.doc
Type: application/msword
Size: 121344 bytes
Desc: not available
URL: <http://lists.sr.unh.edu/pipermail/isocops/attachments/20170531/bd806a2a/IBEX-Command-Approval-Checklist-Rev16b-o0370_KWF-0001.doc>


More information about the Isocops mailing list