[Isocops] IBEX ORbit# 361 ATS (23 Mar 17 - 1 Apr 17) - v001 approval

Ken Fairchild fair-play at comcast.net
Fri Mar 10 11:04:07 EST 2017


All, 

I have looked at the orbit 361 ATS, 



IBEX_2017_082_o0361a_v001.scr, 




and I approve. 




The only constraint violations in 




IBEX_2017_082_o0361a_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_082_o0361a_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_082_o0361a_v001.oef, 




and as verified with ibex_orbit. 




There is one star tracker outage. The outage starts about 17 hours before 15 Re descending and runs for 11 1/2 hours. Some despinning may be required due to this outage. 




There are no moon in Lo FOV sessions. 




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




IBEX_Orbit361_Contacts.txt, 




for all contacts (4). 




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 360 left us pointing in safe directions for the orbit 361 arc A ascending and descending sequences: 




ibex_rotate -o -u 0.99989,0.014206,-0.004224 -w ibex-sun -t 2017/03:24:03:37:30 

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. +3.181 Decl. +1.357 (ibex-sun) 

error is R.A. +2.367 Decl. +1.599 

for a total 2.856 deg 




ibex_rotate -o -u 0.99989,0.014206,-0.004224 -w ibex-sun -t 2017/03:27:14:28:58 

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. +6.421 Decl. +2.743 (ibex-sun) 

error is R.A. +5.607 Decl. +2.985 

for a total 6.350 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 0.996068,0.084833,0.025531 -w ibex-sun -t 2017/03:27:16:12:06 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.996068,+0.084833,+0.025531 

which is R.A. +4.868 Decl. +1.463 

missing R.A. +6.486 Decl. +2.772 (ibex-sun) 

error is R.A. +1.618 Decl. +1.309 

for a total 2.080 deg 




ibex_rotate -o -u 0.996068,0.084833,0.025531 -w ibex-sun -t 2017/03:27:17:47:12 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.996068,+0.084833,+0.025531 

which is R.A. +4.868 Decl. +1.463 

missing R.A. +6.546 Decl. +2.798 (ibex-sun) 

error is R.A. +1.678 Decl. +1.335 

for a total 2.143 deg 




ibex_rotate -o -u 0.996068,0.084833,0.025531 -w ibex-sun -t 2017/04:01:00:30:51 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.996068,+0.084833,+0.025531 

which is R.A. +4.868 Decl. +1.463 

missing R.A. +10.319 Decl. +4.463 (ibex-sun) 

error is R.A. +5.451 Decl. +3.000 

for a total 6.215 deg 




Th inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 362 apogee: 




ibex_rotate -o -u 0.986417,0.154257,0.056449 -w ibex-sun -t 2017/04:01:02:50:08 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.986417,+0.154257,+0.056449 

which is R.A. +8.888 Decl. +3.236 

missing R.A. +10.403 Decl. +4.497 (ibex-sun) 

error is R.A. +1.515 Decl. +1.261 

for a total 1.968 deg 




ibex_rotate -o -u 0.986417,0.154257,0.056449 -w ibex-sun -t 2017-04-06T00:24:17.735Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.986417,+0.154257,+0.056449 

which is R.A. +8.888 Decl. +3.236 

missing R.A. +15.005 Decl. +6.378 (ibex-sun) 

error is R.A. +6.117 Decl. +3.142 

for a total 6.857 deg 




No Lo O-mode. 




There is no overlap with orbit 360 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: Thursday, March 9, 2017 1:36:48 PM 
Subject: IBEX ORbit# 361 ATS (23 Mar 17 - 1 Apr 17) 



Guys, 

Here are the planning files and ATS for Orbit# 361. 

Please respond to this email thread with your comments and approvals 

Approvals are required before 13 Mar 17 @ 1000 UTC 



Note the following: 

1. Orbit# 361 PERIGEE: Battery Balancing Commands 

# 2017-04-01T12:22:02.054Z,Perigee,orbit:361 

SetLongEclipseFlag TRUE $TIME=2017/04:01:12:00:00 

SetLongEclipseFlag FALSE $TIME=2017/04:01:13:30:00 



2. Command Load Constraint Violation Report 

IBEX_2017_082_o0361a_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 2017/03/24 02:04:23 UTC 

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

transition to science mode at 2017/03/27 17:17:12 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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