[Isocops] IBEX Orbit# 368 ATS Approval (24 May 17 - 2 Jun 17) - v002 approval

Fri May 12 17:40:58 EDT 2017

All, 

I have looked at the orbit 368 ATS, 

IBEX_2017_144_o0368a_v002.scr, 

and I approve. 

The only constraint violations in 

IBEX_2017_144_o0368a_v001.ccvr 

are from the removal of the 

ACT_SetSpinPulseProtectEnable Enable 

commands (2); the violations are expected. 

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

IBEX_2017_144_o0368a_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_144_o0368a_v001.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. The outage starts about 4 hours before perigee and runs for about 45 minutes. No despinning should be required due to this outage. 

There is one moon in Lo FOV session in arc B. The ATS start time is 1 1/2 hours after that in the OEF and the ATS end time is about 2 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_Orbit368_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 367 left us pointing in safe directions for the orbit 368 arc A ascending and descending sequences: 

ibex_rotate -o -u 0.478535,0.809384,0.340445 -w ibex-sun -t 2017/05:25:08:35:54 

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. +62.081 Decl. +20.940 (ibex-sun) 

error is R.A. +2.674 Decl. +1.036 

for a total 2.712 deg 

ibex_rotate -o -u 0.478535,0.809384,0.340445 -w ibex-sun -t 2017/05:28:22:12:02 

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. +65.805 Decl. +21.544 (ibex-sun) 

error is R.A. +6.398 Decl. +1.640 

for a total 6.204 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 0.411438,0.840296,0.353018 -w ibex-sun -t 2017/05:28:23:55:10 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.411438,+0.840296,+0.353018 

which is R.A. +63.912 Decl. +20.672 

missing R.A. +65.879 Decl. +21.556 (ibex-sun) 

error is R.A. +1.967 Decl. +0.884 

for a total 2.037 deg 

ibex_rotate -o -u 0.411438,0.840296,0.353018 -w ibex-sun -t 2017/05:29:01:30:16 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.411438,+0.840296,+0.353018 

which is R.A. +63.912 Decl. +20.672 

missing R.A. +65.948 Decl. +21.568 (ibex-sun) 

error is R.A. +2.036 Decl. +0.896 

for a total 2.100 deg 

ibex_rotate -o -u 0.411438,0.840296,0.353018 -w ibex-sun -t 2017/06:02:10:30:28 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.411438,+0.840296,+0.353018 

which is R.A. +63.912 Decl. +20.672 

missing R.A. +70.360 Decl. +22.231 (ibex-sun) 

error is R.A. +6.448 Decl. +1.559 

for a total 6.200 deg 

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 369 apogee: 

ibex_rotate -o -u 0.340091,0.866562,0.365251 -w ibex-sun -t 2017/06:02:12:43:35 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.340091,+0.866562,+0.365251 

which is R.A. +68.572 Decl. +21.423 

missing R.A. +70.448 Decl. +22.241 (ibex-sun) 

error is R.A. +1.876 Decl. +0.818 

for a total 1.924 deg 

ibex_rotate -o -u 0.340091,0.866562,0.365251 -w ibex-sun -t 2017-06-07T09:44:15.877Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.340091,+0.866562,+0.365251 

which is R.A. +68.572 Decl. +21.423 

missing R.A. +75.520 Decl. +22.745 (ibex-sun) 

error is R.A. +6.948 Decl. +1.322 

for a total 6.572 deg 

No Lo O-mode. 

There is no overlap with orbit 367 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 11, 2017 12:07:25 PM 
Subject: IBEX Orbit# 368 ATS Approval (24 May 17 - 2 Jun 17) 

Guys, 

Here are the planning files and ATS for Orbit# 368. 

Please respond to this email thread with your comments/approvals 

Approvals are required before 13 May 17 @1800 UTC 

Note the following: 

1. Battery Balancing at PERIGEE 

Orbit# 368 PERIGEE: Battery Balancing Commands 

# 2017-06-02T22:26:55.394Z,Perigee,orbit:368 

SetLongEclipseFlag TRUE $TIME=2017/06:02:23:00:00 

SetLongEclipseFlag FALSE $TIME=2017/06:03:00:30:00 

2. Moo in LO FOV Commands 

# 2017-05-31T20:38:20.955Z,MoonInLoFovStart,orbit:368 

# 2017-06-01T19:19:11.845Z,MoonInLoFovStop,orbit:368 

3. APL-18 SSR_Dump/Tracking Contact 

*IBEX,APL-18,ADD,06/02/17,153,19:00:00,06/02/17,153,20:00:00,,10_re Descending 2-320K IBEX-2 Orbit# 368 SSR_Dump/Tracking Contact 

* This contact has not been confirmed by APL-18. 

* Commands will be generated at a later date once confirmed 

4. Command Load Constraint Violation Report 

IBEX_2017_144_o0368a_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 2017/05/25 07:06:55 UTC 

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

transition to science mode at 2017/05/29 01:00:16 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. 
********************* 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sr.unh.edu/pipermail/isocops/attachments/20170512/219377f2/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 2392 bytes
Desc: image001.jpg
URL: <http://lists.sr.unh.edu/pipermail/isocops/attachments/20170512/219377f2/image001-0001.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev16b-o0368_KWF.doc
Type: application/msword
Size: 121344 bytes
Desc: not available
URL: <http://lists.sr.unh.edu/pipermail/isocops/attachments/20170512/219377f2/IBEX-Command-Approval-Checklist-Rev16b-o0368_KWF-0001.doc>