[Isocops] IBEX Orbit# 380 ATS (11 Sept - 20 Sept 17) - v001 approval

Thu Aug 31 00:00:13 EDT 2017

All, 

I have looked at the orbit 380 ATS, 

IBEX_2017_254_o0380a_v001.scr, 

and I approve. 

The only constraint violations in 

IBEX_2017_254_o0380a_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_254_o0380a_v002.stf, 

except the ATS has an SSR_DUMP_NEW command. This is expected as APL is being used for the 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_254_o0380a_v001.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. The outage starts 6+ hours after perigee and runs for about 3 hours. No despinning should be required due to this outage. 

There is one moon in Lo FOV session in arc A. The ATS start time is 7 hours after that in the OEF and the ATS end time is about 4 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_Orbit380_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 379 left us pointing in safe directions for the orbit 380 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.970909,0.22326,0.086547 -w ibex-sun -t 2017/09:11:18:57:17 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.970909,+0.223260,+0.086547 

which is R.A. +167.050 Decl. +4.965 

missing R.A. +169.861 Decl. +4.344 (ibex-sun) 

error is R.A. +2.811 Decl. +0.621 

for a total 2.870 deg 

ibex_rotate -o -u -0.970909,0.22326,0.086547 -w ibex-sun -t 2017/09:15:12:13:15 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.970909,+0.223260,+0.086547 

which is R.A. +167.050 Decl. +4.965 

missing R.A. +173.109 Decl. +2.950 (ibex-sun) 

error is R.A. +6.059 Decl. +2.015 

for a total 6.371 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 -0.98669,0.152995,0.05509 -w ibex-sun -t 2017/09:15:13:56:23 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.986690,+0.152995,+0.055090 

which is R.A. +171.186 Decl. +3.158 

missing R.A. +173.174 Decl. +2.923 (ibex-sun) 

error is R.A. +1.988 Decl. +0.235 

for a total 1.999 deg 

ibex_rotate -o -u -0.98669,0.152995,0.05509 -w ibex-sun -t 2017/09:15:15:31:29 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.986690,+0.152995,+0.055090 

which is R.A. +171.186 Decl. +3.158 

missing R.A. +173.233 Decl. +2.898 (ibex-sun) 

error is R.A. +2.047 Decl. +0.260 

for a total 2.061 deg 

ibex_rotate -o -u -0.98669,0.152995,0.05509 -w ibex-sun -t 2017/09:20:05:23:31 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.986690,+0.152995,+0.055090 

which is R.A. +171.186 Decl. +3.158 

missing R.A. +177.468 Decl. +1.122 (ibex-sun) 

error is R.A. +6.282 Decl. +2.036 

for a total 6.599 deg 

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 381 apogee: 

ibex_rotate -o -u -0.996542,0.07948,0.02424 -w ibex-sun -t 2017/09:20:07:58:32 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.996542,+0.079480,+0.024240 

which is R.A. +175.440 Decl. +1.389 

missing R.A. +177.566 Decl. +1.076 (ibex-sun) 

error is R.A. +2.126 Decl. +0.313 

for a total 2.149 deg 

ibex_rotate -o -u -0.996542,0.07948,0.02424 -w ibex-sun -t 2017-09-25T06:34:06.599Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.996542,+0.079480,+0.024240 

which is R.A. +175.440 Decl. +1.389 

missing R.A. +181.871 Decl. -0.831 (ibex-sun) 

error is R.A. +6.431 Decl. +2.220 

for a total 6.803 deg 

No Lo O-mode. 

There is no overlap with orbit 379 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: "Eric Chubin" <Eric.Chubin 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" <kwfairchild at gmail.com>, "Ken Fairchild" <fair-play at comcast.net>, "Robert Lockwood" <Robert.Lockwood at OrbitalATK.com>, "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: Tuesday, August 29, 2017 2:41:54 PM 
Subject: IBEX Orbit# 380 ATS (11 Sept - 20 Sept 17) 

Guys, 

Here are the planning files and ATS for Orbit# 380. 

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

Approvals are required before 30 Aug 17 @1700 UTC 

Note the following: 

1. Moon in Lo FOV Commands 

# 2017-09-12T16:09:48.530Z,MoonInLoFovStart,orbit:380 

# 2017-09-13T14:19:28.759Z,MoonInLoFovStop,orbit:380 

2. APL-18 SSR_Dump/Tracking Contact 

SetRelay stx,on $TIME=2017/09:20:09:58:00 

SetDownlink2K $TIME=2017/09:20:09:58:02 

SetBilevelOutputControlReg STXMODE_Strobe,ON $TIME=2017/09:20:09:58:04 

SetBilevelOutputControlReg COHERENT,ON $TIME=2017/09:20:09:58:06 

SetDownlink320K $TIME=2017/09:20:10:05:00 

SSR_DUMP_NEW $TIME=2017/09:20:10:10:00 

SetRelay stx,off $TIME=2017/09:20:11:02:00 

3. PERIGEE Battery Balancing 

2017-09-20T16:32:57.383Z,Perigee,orbit:380 

SetLongEclipseFlag TRUE $TIME=2017/09:20:16:00:00 

SetLongEclipseFlag FALSE $TIME=2017/09:20:17:30:00 

4. Command Load Constraint Violation Report 

IBEX_2017_254_o0380a_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 2017/09/11 17:09:11 UTC 

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

transition to science mode at 2017/09/15 15:01:29 UTC 

============== 

OTHER MESSAGES 

============== 

NO MESSAGES. 

Sheral R. Wesley 

Sr Systems Engineer 

IBEX , OCO2 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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