[Isocops] IBEX Orbit# 367 ATS Approval (16 May 17 - 24 May 17) - v001 approval

Fri May 5 15:25:04 EDT 2017

All, 

I have looked at the orbit 367 ATS, 

IBEX_2017_136_o0367a_v001.scr, 

and I approve. 

The only constraint violations in 

IBEX_2017_136_o0367a_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_136_o0367a_v002.stf, 

except that the ATS has an SSR_DUMP_NEW command. This is expected as APL is being used for a dump pass. 

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_136_o0367a_v001.oef, 

and as verified with ibex_orbit. 

There are no star tracker outages. 

There is one moon in Lo FOV session in arc A. The ATS start time is almost 5 hours after that in the OEF and the ATS end time is about 2 hours after 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_Orbit367_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 366 left us pointing in safe directions for the orbit 367 arc A ascending and descending sequences: 

ibex_rotate -o -u 0.603139,0.735581,0.308453 -w ibex-sun -t 2017/05:16:12:38:53 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.603139,+0.735581,+0.308453 

which is R.A. +50.650 Decl. +17.966 

missing R.A. +53.245 Decl. +19.133 (ibex-sun) 

error is R.A. +2.595 Decl. +1.167 

for a total 2.723 deg 

ibex_rotate -o -u 0.603139,0.735581,0.308453 -w ibex-sun -t 2017/05:19:23:09:51 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.603139,+0.735581,+0.308453 

which is R.A. +50.650 Decl. +17.966 

missing R.A. +56.776 Decl. +19.902 (ibex-sun) 

error is R.A. +6.126 Decl. +1.936 

for a total 6.109 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 0.543251,0.774347,0.324446 -w ibex-sun -t 2017/05:20:00:52:59 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.543251,+0.774347,+0.324446 

which is R.A. +54.948 Decl. +18.932 

missing R.A. +56.849 Decl. +19.918 (ibex-sun) 

error is R.A. +1.901 Decl. +0.986 

for a total 2.046 deg 

ibex_rotate -o -u 0.543251,0.774347,0.324446 -w ibex-sun -t 2017/05:20:02:28:05 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.543251,+0.774347,+0.324446 

which is R.A. +54.948 Decl. +18.932 

missing R.A. +56.916 Decl. +19.932 (ibex-sun) 

error is R.A. +1.968 Decl. +1.000 

for a total 2.108 deg 

ibex_rotate -o -u 0.543251,0.774347,0.324446 -w ibex-sun -t 2017/05:24:08:47:31 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.543251,+0.774347,+0.324446 

which is R.A. +54.948 Decl. +18.932 

missing R.A. +61.123 Decl. +20.808 (ibex-sun) 

error is R.A. +6.175 Decl. +1.876 

for a total 6.103 deg 

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 368 apogee: 

ibex_rotate -o -u 0.478535,0.809384,0.340445 -w ibex-sun -t 2017/05:24:10:59:53 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.478535,+0.809384,+0.340445 

which is R.A. +59.407 Decl. +19.904 

missing R.A. +61.209 Decl. +20.822 (ibex-sun) 

error is R.A. +1.802 Decl. +0.918 

for a total 1.923 deg 

ibex_rotate -o -u 0.478535,0.809384,0.340445 -w ibex-sun -t 2017-05-29T09:44:50.595Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.478535,+0.809384,+0.340445 

which is R.A. +59.407 Decl. +19.904 

missing R.A. +66.303 Decl. +21.625 (ibex-sun) 

error is R.A. +6.896 Decl. +1.721 

for a total 6.673 deg 

No Lo O-mode. 

There is no overlap with orbit 366 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: "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>, "Sheral Wesley" <Sheral.Wesley at OrbitalATK.com> 
Sent: Thursday, May 4, 2017 10:57:24 AM 
Subject: IBEX Orbit# 367 ATS Approval (16 May 17 - 24 May 17) 

Guys, 

Here are the planning products and ATS for Orbit# 367 

Please respond to this email thread with your comments and approvals 

Approvals are required before 5 May 17 @2000 UTC 

Note the following: 

1. Battery Balancing at PERIGEE: 

# 2017-05-24T20:43:40.655Z,Perigee,orbit:367 

SetLongEclipseFlag TRUE $TIME=2017/05:24:20:00:00 

SetLongEclipseFlag FALSE $TIME=2017/05:24:21:30:00 

2. Moon in LO FOV 

# 2017-05-16T18:15:53.565Z,MoonInLoFovStart,orbit:367 

# 2017-05-17T09:45:38.088Z,MoonInLoFovStop,orbit:367 

3. APL-18 SSR_Dump/Tracking Contact 

IBEX,APL-18,ADD,05/24/17,144,15:30:00,05/24/17,144,16:30:00,,11_re Descending 2-320K IBEX-2 Orbit# 367 SSR_Dump/Tracking Contact 

4. Command Load Constraint Violation Report 

IBEX_2017_136_o0367a_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 2017/05/16 11:11:14 UTC 

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

transition to science mode at 2017/05/20 01:58:05 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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