[Isocops] IBEX ORbit# 365 ATS (28 Apr 17 - 7 May 17) - v001 approval

Sun Apr 16 16:43:10 EDT 2017

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 

----- 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: 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 

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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