All,

I have looked at the orbit 365 ATS,

IBEX_2017_118_o0365a_v001.scr,


and I approve.


The only constraint violations in


IBEX_2017_118_o0365a_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_118_o0365a_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_118_o0365a_v001.oef,


and as verified with ibex_orbit.


There are no star tracker outages.


There is one moon in Lo FOV session in arc B.  The ATS start time is about 1 1/2 hours after that in the OEF and the ATS end time is about 4 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_Orbit365_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 364 left us pointing in safe directions for the orbit 365 arc A ascending and descending sequences:


ibex_rotate -o -u  0.812902,0.538089,0.222825 -w ibex-sun -t 2017/04:28:16:26:56

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.  +35.949 Decl. +14.259 (ibex-sun)

 error is     R.A.   +2.447 Decl.  +1.384

 for a total  2.752 deg


ibex_rotate -o -u  0.812902,0.538089,0.222825 -w ibex-sun -t 2017/05:02:05:01:30

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.  +39.428 Decl. +15.362 (ibex-sun)

 error is     R.A.   +5.926 Decl.  +2.487

 for a total  6.262 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  0.766612,0.593168,0.245883 -w ibex-sun -t 2017/05:02:06:44:38

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.766612,+0.593168,+0.245883

 which is     R.A.  +37.731 Decl. +14.234

 missing      R.A.  +39.498 Decl. +15.384 (ibex-sun)

 error is     R.A.   +1.767 Decl.  +1.150

 for a total  2.059 deg


ibex_rotate -o -u  0.766612,0.593168,0.245883 -w ibex-sun -t 2017/05:02:08:19:44

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.766612,+0.593168,+0.245883

 which is     R.A.  +37.731 Decl. +14.234

 missing      R.A.  +39.562 Decl. +15.405 (ibex-sun)

 error is     R.A.   +1.831 Decl.  +1.171

 for a total  2.122 deg


ibex_rotate -o -u  0.766612,0.593168,0.245883 -w ibex-sun -t 2017/05:06:16:34:13

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.766612,+0.593168,+0.245883

 which is     R.A.  +37.731 Decl. +14.234

 missing      R.A.  +43.639 Decl. +16.677 (ibex-sun)

 error is     R.A.   +5.908 Decl.  +2.443

 for a total  6.196 deg


The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 366 apogee:


ibex_rotate -o -u 0.714991,0.645183,0.269306 -w ibex-sun -t 2017/05:06:18:50:11

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.714991,+0.645183,+0.269306

 which is     R.A.  +42.062 Decl. +15.623

 missing      R.A.  +43.723 Decl. +16.700 (ibex-sun)

 error is     R.A.   +1.661 Decl.  +1.077

 for a total  1.925 deg


ibex_rotate -o -u 0.714991,0.645183,0.269306 -w ibex-sun -t 2017-05-11T14:59:21.459Z

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

 points axis  +1.000000,+0.000000,+0.000000

 towards ECI  +0.714991,+0.645183,+0.269306

 which is     R.A.  +42.062 Decl. +15.623

 missing      R.A.  +48.540 Decl. +17.972 (ibex-sun)

 error is     R.A.   +6.478 Decl.  +2.349

 for a total  6.631 deg


No Lo O-mode.


There is no overlap with orbit 364 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: Friday, April 14, 2017 12:03:51 PM
Subject: IBEX ORbit# 365 ATS (28 Apr 17 - 7 May 17)

Guys,

  Here are the planning files and ATS for Orbit# 365.

Please respond to this email thread with your comments and approvals

Approvals are required before 18 April 17 1300 UTC.

 

Note the following:

1.       Battery Balancing at PERIGEE

# Orbit# 365  PERIGEE: Battery Balancing Commands  

# 2017-05-07T04:27:29.626Z,Perigee,orbit:365

  SetLongEclipseFlag TRUE $TIME=2017/05:07:04:00:00

  SetLongEclipseFlag FALSE $TIME=2017/05:07:05:30:00

 

2.       Moon in LO FOV

# 2017-05-02T18:04:30.164Z,MoonInLoFovStart,orbit:365

# 2017-05-04T01:11:37.603Z,MoonInLoFovStop,orbit:365

 

3.       IBEX Hi Gain Test

#  Start TIME=2017/05:05:13:00:00

#   End TIME=2017/05:05:17:15:41

 

4.       Command Load Constraint Violation Report

IBEX_2017_118_o0365a_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 2017/04/28 14:55:17 UTC

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

             transition to science mode at 2017/05/02 07:49:44 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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