[Isocops] IBEX Orbit# 387 ATS Approval (14 Nov 17 - 23 Nov 17) - v001 approval

Ken Fairchild fair-play at comcast.net
Thu Nov 2 21:38:00 EDT 2017


All, 

I have looked at the orbit 387 ATS, 



IBEX_2017_318_o0387a_v001.scr, 




and I approve. 




The only constraint violations in 




IBEX_2017_318_o0387a_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_318_o0387a_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_318_o0387a_v001.oef, 




and as verified with ibex_orbit. 




There are no star tracker outages. 




There are no moon in Lo FOV sessions. 




The ground station command sequences are correct and the timing and bit rates match those in the contacts file, 




IBEX_Orbit387_Contacts.txt, 




for all contacts (2). 




We are not doing battery cell balancing this orbit; we'll do it again in the next orbit. 




The inertial maneuver at perigee of orbit 386 left us pointing in safe directions for the orbit 387 arc A ascending and descending sequences: 




ibex_rotate -o -u -0.645818,-0.696712,-0.312269 -w ibex-sun -t 2017/11:15:04:36:47 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.645818,-0.696712,-0.312269 

which is R.A. +227.171 Decl. -18.196 

missing R.A. +230.384 Decl. -18.486 (ibex-sun) 

error is R.A. +3.213 Decl. +0.290 

for a total 3.063 deg 




ibex_rotate -o -u -0.645818,-0.696712,-0.312269 -w ibex-sun -t 2017/11:18:19:33:44 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.645818,-0.696712,-0.312269 

which is R.A. +227.171 Decl. -18.196 

missing R.A. +234.012 Decl. -19.357 (ibex-sun) 

error is R.A. +6.841 Decl. +1.161 

for a total 6.580 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 -0.581407,-0.742323,-0.33305 -w ibex-sun -t 2017/11:18:21:16:52 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.581407,-0.742323,-0.333050 

which is R.A. +231.931 Decl. -19.454 

missing R.A. +234.086 Decl. -19.373 (ibex-sun) 

error is R.A. +2.155 Decl. +0.081 

for a total 2.034 deg 




ibex_rotate -o -u -0.581407,-0.742323,-0.33305 -w ibex-sun -t 2017/11:18:22:51:58 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.581407,-0.742323,-0.333050 

which is R.A. +231.931 Decl. -19.454 

missing R.A. +234.154 Decl. -19.387 (ibex-sun) 

error is R.A. +2.223 Decl. +0.067 

for a total 2.097 deg 




ibex_rotate -o -u -0.581407,-0.742323,-0.33305 -w ibex-sun -t 2017/11:23:07:48:42 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.581407,-0.742323,-0.333050 

which is R.A. +231.931 Decl. -19.454 

missing R.A. +238.816 Decl. -20.324 (ibex-sun) 

error is R.A. +6.885 Decl. +0.870 

for a total 6.532 deg 




The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 388 apogee: 




ibex_rotate -o -u -0.515795,-0.782244,-0.349357 -w ibex-sun -t 2017/11:23:10:08:30 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.515795,-0.782244,-0.349357 

which is R.A. +236.600 Decl. -20.448 

missing R.A. +238.926 Decl. -20.347 (ibex-sun) 

error is R.A. +2.326 Decl. +0.101 

for a total 2.182 deg 




ibex_rotate -o -u -0.515795,-0.782244,-0.349357 -w ibex-sun -t 2017-11-28T07:41:25.158Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.515795,-0.782244,-0.349357 

which is R.A. +236.600 Decl. -20.448 

missing R.A. +244.052 Decl. -21.317 (ibex-sun) 

error is R.A. +7.452 Decl. +0.869 

for a total 7.015 deg 




No Lo O-mode. 




There is no overlap with orbit 386 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>, "Colin Joyce" <cjl46 at wildcats.unh.edu>, "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: Wednesday, November 1, 2017 10:13:45 AM 
Subject: IBEX Orbit# 387 ATS Approval (14 Nov 17 - 23 Nov 17) 



Guys, 

Here are the planning files and ATS for Orbit# 387. 

Please respond to this email thread with your comments and approvals 

Approvals are required before 4 Nov 17 @1800 UTC 



Note the following: 

1. No battery balancing 

2. APL Contact 

· The contact has not been confirmed and the time could change 

· The contact commands will be uploaded at a later date 

3. Command Load Constraint Violation Report 

IBEX_2017_318_o0387a_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 2017/11/15 02:51:59 UTC 

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

transition to science mode at 2017/11/18 22:21:58 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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