[Isocops] IBEX ORbit# 360 ATS (14 MAr 17 - 23 MAr 17) - v001 approval

Ken Fairchild fair-play at comcast.net
Fri Mar 3 10:42:45 EST 2017


All, 

I have looked at the orbit 360 ATS, 



IBEX_2017_073_o0360a_v001.scr, 




and I approve. 




The only constraint violations in 




IBEX_2017_073_o0360a_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 v003 STF, 




IBEX_2017_073_o0360a_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_2017_073_o0360a_v001.oef, 




and as verified with ibex_orbit. 




There is one star tracker outage. The outage starts 3- days after apogee and runs for 20 hours. Some despinning may be required due to this outage. 




There is a moon in Lo FOV session in arc B. The ATS start time is an hour before that in the OEF and the ATS end time is 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_Orbit360_Contacts.txt, 




for all contacts (3). 




No battery cell balancing this orbit; we'll do it again in the next orbit. 




The inertial maneuver at perigee of orbit 359 left us pointing in safe directions for the orbit 360 arc A ascending and descending sequences: 




ibex_rotate -o -u 0.996385,-0.073345,-0.04287 -w ibex-sun -t 2017/03:15:03:35:49 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.996385,-0.073345,-0.042870 

which is R.A. +355.790 Decl. -2.457 

missing R.A. +354.972 Decl. -2.195 (ibex-sun) 

error is R.A. +0.818 Decl. +0.262 

for a total 0.858 deg 




ibex_rotate -o -u 0.996385,-0.073345,-0.04287 -w ibex-sun -t 2017/03:18:16:36:04 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.996385,-0.073345,-0.042870 

which is R.A. +355.790 Decl. -2.457 

missing R.A. +358.299 Decl. -0.769 (ibex-sun) 

error is R.A. +2.509 Decl. +1.688 

for a total 3.023 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 0.999349,-0.027722,-0.023089 -w ibex-sun -t 2017/03:18:18:19:12 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.999349,-0.027722,-0.023089 

which is R.A. +358.411 Decl. -1.323 

missing R.A. +358.364 Decl. -0.740 (ibex-sun) 

error is R.A. +0.047 Decl. +0.583 

for a total 0.585 deg 




ibex_rotate -o -u 0.999349,-0.027722,-0.023089 -w ibex-sun -t 2017/03:18:19:54:18 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.999349,-0.027722,-0.023089 

which is R.A. +358.411 Decl. -1.323 

missing R.A. +358.424 Decl. -0.714 (ibex-sun) 

error is R.A. +0.013 Decl. +0.609 

for a total 0.610 deg 




ibex_rotate -o -u 0.999349,-0.027722,-0.023089 -w ibex-sun -t 2017/03:23:03:58:34 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.999349,-0.027722,-0.023089 

which is R.A. +358.411 Decl. -1.323 

missing R.A. +2.251 Decl. +0.998 (ibex-sun) 

error is R.A. +356.160 Decl. +2.321 

for a total 4.487 deg 




The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 361 apogee: 




ibex_rotate -o -u 0.99989,0.014206,-0.004224 -w ibex-sun -t 2017/03:23:06:15:37 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.999890,+0.014206,-0.004224 

which is R.A. +0.814 Decl. -0.242 

missing R.A. +2.335 Decl. +1.033 (ibex-sun) 

error is R.A. +1.521 Decl. +1.275 

for a total 1.984 deg 




ibex_rotate -o -u 0.99989,0.014206,-0.004224 -w ibex-sun -t 2017-03-28T02:01:11.231Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.999890,+0.014206,-0.004224 

which is R.A. +0.814 Decl. -0.242 

missing R.A. +6.856 Decl. +2.936 (ibex-sun) 

error is R.A. +6.042 Decl. +3.178 

for a total 6.825 deg 




No Lo O-mode. 




There is no overlap with orbit 359 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: "Sheral Wesley" <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>, "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> 
Sent: Wednesday, March 1, 2017 11:12:52 AM 
Subject: IBEX ORbit# 360 ATS (14 MAr 17 - 23 MAr 17) 



Guys, 

Here are the planning products and ATS for Orbit# 360. 

Please respond to this email thread with your comments and approvals 

Approvals are required before 3 Mar 17 @1800 UTC 



Note the following: 

1. Moon in Lo FOV 

2017-03-22T03:03:40.234Z,MoonInLoFovStart,orbit:360 

2017-03-22T18:07:34.073Z,MoonInLoFovStop,orbit:360 



2. ISN Table Load 15 Mar 17 @0500 UTC 



3. Command Load Constraint Violation Report 

IBEX_2017_073_o0360a_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 2017/03/15 01:57:39 UTC 

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

transition to science mode at 2017/03/18 19:24:18 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. 
********************* 

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