[Isocops] IBEX Orbit# 332 ATS Approval (2 Jul16 - 11Jul16) - v001 approval

Ken Fairchild fair-play at comcast.net
Tue Jun 21 12:40:30 EDT 2016


All, 

I have looked at the orbit 332 ATS, 



IBEX_2016_184_o0332a_v001.scr, 




and I approve. 




The only constraint violations in 




IBEX_2016_184_o0332a_v001.ccvr 




are because we removed the 




ACT_SetSpinPulseProtectEnable Enable 




commands (2) and because of a long SSR dump contact; the violations are expected. 




The PL commands in the v001 ATS match those in the v002 STF, 




IBEX_2016_184_o0332a_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_2016_184_o0332a_v001.oef, 




and as verified with ibex_orbit. 




There is one star tracker outage. It starts 3 hours before perigee and ends about 2 hours after perigee. No despinning should be required due to this outage. 




There is one moon in Lo FOV session in arc B. The ATS start time is about 1 hour after that in the OEF and the ATS end time is the same as that in the OEF. Differences in timing are not unusual. 




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




IBEX_Orbit332_Contacts.txt, 




for all contacts(2). 




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




The inertial maneuver at perigee of orbit 331 left us pointing in safe directions for the orbit 332 arc A ascending and descending sequences: 




ibex_rotate -o -u -0.152111,0.91064,0.384183 -w ibex-sun -t 2016/07:03:04:09:32 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.152111,+0.910640,+0.384183 

which is R.A. +99.483 Decl. +22.593 

missing R.A. +102.400 Decl. +22.933 (ibex-sun) 

error is R.A. +2.917 Decl. +0.340 

for a total 2.711 deg 




ibex_rotate -o -u -0.152111,0.91064,0.384183 -w ibex-sun -t 2016/07:06:19:53:04 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.152111,+0.910640,+0.384183 

which is R.A. +99.483 Decl. +22.593 

missing R.A. +106.215 Decl. +22.566 (ibex-sun) 

error is R.A. +6.732 Decl. +0.027 

for a total 6.215 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 -0.226264,0.897743,0.37797 -w ibex-sun -t 2016/07:06:21:36:12 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.226264,+0.897743,+0.377970 

which is R.A. +104.146 Decl. +22.208 

missing R.A. +106.290 Decl. +22.559 (ibex-sun) 

error is R.A. +2.144 Decl. +0.351 

for a total 2.013 deg 




ibex_rotate -o -u -0.226264,0.897743,0.37797 -w ibex-sun -t 2016/07:06:23:11:18 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.226264,+0.897743,+0.377970 

which is R.A. +104.146 Decl. +22.208 

missing R.A. +106.359 Decl. +22.552 (ibex-sun) 

error is R.A. +2.213 Decl. +0.344 

for a total 2.075 deg 




ibex_rotate -o -u -0.226264,0.897743,0.37797 -w ibex-sun -t 2016/07:11:10:55:57 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.226264,+0.897743,+0.377970 

which is R.A. +104.146 Decl. +22.208 

missing R.A. +110.973 Decl. +22.055 (ibex-sun) 

error is R.A. +6.827 Decl. +0.153 

for a total 6.326 deg 




The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 333 apogee: 




ibex_rotate -o -u -0.302078,0.878444,0.370249 -w ibex-sun -t 2016/07:11:13:07:48 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.302078,+0.878444,+0.370249 

which is R.A. +108.977 Decl. +21.731 

missing R.A. +111.061 Decl. +22.042 (ibex-sun) 

error is R.A. +2.084 Decl. +0.312 

for a total 1.959 deg 




ibex_rotate -o -u -0.302078,0.878444,0.370249 -w ibex-sun -t 2016-07-16T12:32:16.781Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.302078,+0.878444,+0.370249 

which is R.A. +108.977 Decl. +21.731 

missing R.A. +116.070 Decl. +21.246 (ibex-sun) 

error is R.A. +7.093 Decl. +0.485 

for a total 6.617 deg 




No Lo O-mode. 




The transmitter off command from the last orbit 331 contact occurs after the orbit 332 arc A ascending bus commands. This should not be a problem. 




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: Monday, June 20, 2016 5:56:30 AM 
Subject: IBEX Orbit# 332 ATS Approval (2 Jul16 - 11Jul16) 



Guys, 

Here are the planning files and ATS for Orbit# 332 

Please respond to this email thread with your questions, comments and approvals 

Approvals are required before 21 June 16 @2000 UTC 



Note the following 

1. No PERIGEE Battery Balancing Commands 

2. Moon in LO FOV 

# Orbit# 332 APOGEE: Moon in FOV Commands 

# 2016-07-11T00:08:18.744Z,MoonInLoFovStart,orbit:332 

# 2016-07-11T09:31:37.446Z,MoonInLoFovStop,orbit:332 

3. Command Load Constraint Violation Report 

IBEX_2016_184_o0332a_v001.scr 



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

HARD CONSTRAINT VIOLATIONS 

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

NO VIOLATIONS. 



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

SOFT CONSTRAINT VIOLATIONS 

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

IBX-CLC-006: Planned transmission at 2016/07/11 20:43:00 UTC - 2016/07/11 

22:17:00 UTC exceeds the maximum contiguous transmission time of 

5400 seconds 

· SSR_Dump/Tracking Contact IBEX,USHI01,ADD,07/11/16,193,20:45:00,07/11/16,193,22:15:00,,LAHO 160K IBEX-3 ORbit# 332 SSR_Dump/Tracking Contact 



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

transition to science mode at 2016/07/03 02:42:28 UTC 

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

transition to science mode at 2016/07/06 22:41:18 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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