All,

I have looked at the orbit 364 ATS,

IBEX_2017_109_o0364a_v001.scr,


and I approve.


The only constraint violations in


IBEX_2017_109_o0364a_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_109_o0364a_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_109_o0364a_v001.oef,


and as verified with ibex_orbit.


There are no star tracker outages.


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_Orbit364_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 363 left us pointing in safe directions for the orbit 364 arc A ascending and descending sequences:


ibex_rotate -o -u 0.890695,0.420801,0.172015 -w ibex-sun -t 2017/04:19:21:31:22

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.890695,+0.420801,+0.172015

 which is     R.A.  +25.288 Decl.  +9.905

 missing      R.A.  +27.686 Decl. +11.368 (ibex-sun)

 error is     R.A.   +2.398 Decl.  +1.463

 for a total  2.774 deg


ibex_rotate -o -u 0.890695,0.420801,0.172015 -w ibex-sun -t 2017/04:23:07:36:06

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.890695,+0.420801,+0.172015

 which is     R.A.  +25.288 Decl.  +9.905

 missing      R.A.  +31.001 Decl. +12.554 (ibex-sun)

 error is     R.A.   +5.713 Decl.  +2.649

 for a total  6.197 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 0.854488,0.480615,0.197127 -w ibex-sun -t 2017/04:23:09:19:14 

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.854488,+0.480615,+0.197127

 which is     R.A.  +29.356 Decl. +11.369

 missing      R.A.  +31.068 Decl. +12.579 (ibex-sun)

 error is     R.A.   +1.712 Decl.  +1.210

 for a total  2.066 deg


ibex_rotate -o -u 0.854488,0.480615,0.197127 -w ibex-sun -t 2017/04:23:10:54:20

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.854488,+0.480615,+0.197127

 which is     R.A.  +29.356 Decl. +11.369

 missing      R.A.  +31.131 Decl. +12.602 (ibex-sun)

 error is     R.A.   +1.775 Decl.  +1.233

 for a total  2.129 deg


ibex_rotate -o -u 0.854488,0.480615,0.197127 -w ibex-sun -t 2017/04:27:16:40:49

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.854488,+0.480615,+0.197127

 which is     R.A.  +29.356 Decl. +11.369

 missing      R.A.  +35.021 Decl. +13.992 (ibex-sun)

 error is     R.A.   +5.665 Decl.  +2.623

 for a total  6.117 deg


The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 365 apogee:


ibex_rotate -o -u 0.812902,0.538089,0.222825 -w ibex-sun -t 2017/04:27:18:56:25

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.812902,+0.538089,+0.222825

 which is     R.A.  +33.502 Decl. +12.875

 missing      R.A.  +35.104 Decl. +14.018 (ibex-sun)

 error is     R.A.   +1.602 Decl.  +1.143

 for a total  1.932 deg


ibex_rotate -o -u 0.812902,0.538089,0.222825 -w ibex-sun -t 2017-05-02T16:33:41.137Z

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.812902,+0.538089,+0.222825

 which is     R.A.  +33.502 Decl. +12.875

 missing      R.A.  +39.892 Decl. +15.511 (ibex-sun)

 error is     R.A.   +6.390 Decl.  +2.636

 for a total  6.732 deg


No Lo O-mode.


There is no overlap with orbit 363 commands by manual inspection or by checking at


http://ibex.unh.edu/cgi-bin/ats.cgi.


Command Approval Checklist is attached.


Ken




From: "Sheral Wesley" <Sheral.Wesley@OrbitalATK.com>
To: "Sheral Wesley" <Sheral.Wesley@OrbitalATK.com>, "David Heirtzler" <dheirtzl@atlas.sr.unh.edu>, "IBEX-FDG" <IBEX.fdg@applieddefense.com>, "IBEXOPS" <IBEXOPS@gmail.com>, "ISOC" <isocops@lists.sr.unh.edu>, "Ken Fairchild" <fair-play@comcast.net>, "Ken Fairchild" <kwfairchild@gmail.com>, "Robert Lockwood" <Robert.Lockwood@OrbitalATK.com>, "Michelle Reno" <mreno@swri.edu>, "Nigel Angold" <nigel.angold@nasa.gov>, "Paul Janzen" <paul.janzen@umontana.edu>, "Timothy Perry" <Timothy.Perry@OrbitalATK.com>, "Ryan Tyler" <Ryan.Tyler@OrbitalATK.com>
Sent: Thursday, April 6, 2017 10:07:53 AM
Subject: IBEX Orbit# 364 ATS (19 Apr 17 - 28 Apr 17)

Guys, Here are the planning files and ATS for Orbit# 364.

Please respond to this email thread with your comments and approvals

Approvals are required before9 Apr 17 @1800 UTC

 

Note the following:

1.       Battery Balancing at PERIGEE

# Orbit# 364  PERIGEE: Battery Balancing Commands  

# 2017-04-28T04:35:10.442Z,Perigee,orbit:364

  SetLongEclipseFlag TRUE $TIME=2017/04:28:04:00:00

SetLongEclipseFlag FALSE $TIME=2017/04:28:05:30:00 

 

2.       Command Load Constraint Violation Report

IBEX_2017_109_o0364a_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 2017/04/19 20:00:04 UTC

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

             transition to science mode at 2017/04/23 10:24:20 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

cid:image001.jpg@01D04F6C.5A1C97F0

 



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