[Isocops] IBEX Orbit# 354 ATS Approval (18 Jan 17 - 27 Jan 17) - v002 approval

Sat Jan 7 13:17:26 EST 2017

All, 

I have looked at the orbit 354 ATS, 

IBEX_2017_018_o0354a_v002.scr, 

and I approve. 

The only constraint violations in 

IBEX_2017_018_o0354a_v001.ccvr 

are because we removed the 

ACT_SetSpinPulseProtectEnable Enable 

commands (2); the violations are expected. 

The PL commands in the v002 ATS match those in the v003 STF, 

IBEX_2017_018_o0354a_v003.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_018_o0354a_v001.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. The outage starts 1- days before apogee and runs for over 3 1/2 days. Some despinning may be required due to this outage. 

The OEF includes two moon in Lo FOV sessions but there is only one in the ATS. The arc A session in the OEF is a short session (~2 hours) and is not included in the ATS. The arc B session is longer and the appropriate commands appear in the ATS. The ATS start time is 4 1/2 hours before that in the OEF and the ATS end time is 7 1/2 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_Orbit354_Contacts.txt, 

for all contacts (5). 

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

The inertial maneuver at perigee of orbit 353 left us pointing in safe directions for the orbit 354 arc A ascending and descending sequences: 

ibex_rotate -o -u 0.485271,-0.759002,-0.434084 -w ibex-sun -t 2017/01:18:23:47:49 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.485271,-0.759002,-0.434084 

which is R.A. +302.593 Decl. -25.727 

missing R.A. +301.024 Decl. -20.397 (ibex-sun) 

error is R.A. +1.569 Decl. +5.330 

for a total 5.522 deg 

ibex_rotate -o -u 0.485271,-0.759002,-0.434084 -w ibex-sun -t 2017/01:22:02:26:44 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.485271,-0.759002,-0.434084 

which is R.A. +302.593 Decl. -25.727 

missing R.A. +304.320 Decl. -19.738 (ibex-sun) 

error is R.A. +1.727 Decl. +5.989 

for a total 6.197 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 0.556508,-0.758676,-0.338689 -w ibex-sun -t 2017/01:22:04:09:52 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.556508,-0.758676,-0.338689 

which is R.A. +306.261 Decl. -19.797 

missing R.A. +304.394 Decl. -19.721 (ibex-sun) 

error is R.A. +1.867 Decl. +0.076 

for a total 1.759 deg 

ibex_rotate -o -u 0.556508,-0.758676,-0.338689 -w ibex-sun -t 2017/01:22:05:44:58 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.556508,-0.758676,-0.338689 

which is R.A. +306.261 Decl. -19.797 

missing R.A. +304.462 Decl. -19.706 (ibex-sun) 

error is R.A. +1.799 Decl. +0.092 

for a total 1.695 deg 

ibex_rotate -o -u 0.556508,-0.758676,-0.338689 -w ibex-sun -t 2017/01:27:07:22:45 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.556508,-0.758676,-0.338689 

which is R.A. +306.261 Decl. -19.797 

missing R.A. +309.677 Decl. -18.430 (ibex-sun) 

error is R.A. +3.416 Decl. +1.367 

for a total 3.505 deg 

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 355 apogee: 

ibex_rotate -o -u 0.621391,-0.675047,-0.397724 -w ibex-sun -t 2017/01:27:09:39:07 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.621391,-0.675047,-0.397724 

which is R.A. +312.630 Decl. -23.436 

missing R.A. +309.779 Decl. -18.406 (ibex-sun) 

error is R.A. +2.851 Decl. +5.030 

for a total 5.691 deg 

ibex_rotate -o -u 0.621391,-0.675047,-0.397724 -w ibex-sun -t 2017-02-01T09:01:56.211Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.621391,-0.675047,-0.397724 

which is R.A. +312.630 Decl. -23.436 

missing R.A. +314.967 Decl. -17.079 (ibex-sun) 

error is R.A. +2.337 Decl. +6.357 

for a total 6.723 deg 

No Lo O-mode. 

There is no overlap with orbit 353 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, January 5, 2017 12:40:49 AM 
Subject: IBEX Orbit# 354 ATS Approval (18 Jan 17 - 27 Jan 17) 

Guys, 

Here are the planning files and ATS for Orbit# 354. 

Please respond to this email thread with your comments and approvals. 

Approvals are required before 7 Jan 17 @1800 UTC 

1. (2) ISN Table Load Contacts 

2. APL-18 Apogee Tracking Contact 

IBEX,APL-18,ADD,01/22/17,022,17:00:00,01/22/17,022,17:35:00,,46_re Ascending 2K IBEX Orbit# 354 Apogee Tracking Contact (46 Asc) 

3. Moon in Lo FOV Commands 

Orbit# 354 APOGEE: Moon in Lo FOV Commands 

# 2017-01-23T13:35:29.303Z,MoonInLoFovStart,orbit:354 

# 2017-01-24T15:49:20.898Z,MoonInLoFovStop,orbit:354 

4. Short Eclipse: no action required 

# 2017-01-27T19:11:34.760Z,Perigee,orbit:354 

# 2017-01-27T20:43:35.499Z,EclipseEntry,moderate:false,long:false,orbit:354 

# 2017-01-27T21:17:15.366Z,EclipseExit,moderate:false,long:false,orbit:354 

5. APL-18 SSR_Dump/Tracking Contact 

IBEX,APL-18,ADD,01/28/17,028,03:00:00,01/28/17,028,04:00:00,,13re-Ascending Perigee 2K-320K IBEX Orbit# 354 SSR_Dump/Tracking Contact (13 Asc) 

6. Command Load Constraint Violation Report 

IBEX_2017_018_o0354a_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 2017/01/18 22:11:39 UTC 

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

transition to science mode at 2017/01/22 05:14:58 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 

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 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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