[Isocops] IBEX Orbit# 384 ATS (18 Oct 17 - 27 Oct 17) - v001 approval

Fri Oct 6 05:24:43 EDT 2017

All, 

I have looked at the orbit 384 ATS, 

IBEX_2017_291_o0384a_v001.scr, 

and I approve. 

The only constraint violations in 

IBEX_2017_291_o0384a_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_291_o0384a_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_291_o0384a_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_Orbit384_Contacts.txt, 

for all contacts (3). 

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 383 left us pointing in safe directions for the orbit 384 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.924721,-0.345408,-0.15995 -w ibex-sun -t 2017/10:18:17:36:25 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.924721,-0.345408,-0.159950 

which is R.A. +200.482 Decl. -9.204 

missing R.A. +203.450 Decl. -9.806 (ibex-sun) 

error is R.A. +2.968 Decl. +0.602 

for a total 2.989 deg 

ibex_rotate -o -u -0.924721,-0.345408,-0.15995 -w ibex-sun -t 2017/10:22:09:08:05 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.924721,-0.345408,-0.159950 

which is R.A. +200.482 Decl. -9.204 

missing R.A. +206.768 Decl. -11.076 (ibex-sun) 

error is R.A. +6.286 Decl. +1.872 

for a total 6.464 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 -0.891339,-0.411724,-0.18973 -w ibex-sun -t 2017/10:22:10:51:13 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.891339,-0.411724,-0.189730 

which is R.A. +204.793 Decl. -10.937 

missing R.A. +206.836 Decl. -11.100 (ibex-sun) 

error is R.A. +2.043 Decl. +0.163 

for a total 2.011 deg 

ibex_rotate -o -u -0.891339,-0.411724,-0.18973 -w ibex-sun -t 2017/10:22:12:26:19 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.891339,-0.411724,-0.189730 

which is R.A. +204.793 Decl. -10.937 

missing R.A. +206.898 Decl. -11.122 (ibex-sun) 

error is R.A. +2.105 Decl. +0.185 

for a total 2.074 deg 

ibex_rotate -o -u -0.891339,-0.411724,-0.18973 -w ibex-sun -t 2017/10:26:22:20:50 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.891339,-0.411724,-0.189730 

which is R.A. +204.793 Decl. -10.937 

missing R.A. +211.232 Decl. -12.643 (ibex-sun) 

error is R.A. +6.440 Decl. +1.706 

for a total 6.530 deg 

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 385 apogee: 

ibex_rotate -o -u -0.853101,-0.474889,-0.216099 -w ibex-sun -t 2017/10:27:00:50:13 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.853101,-0.474889,-0.216099 

which is R.A. +209.103 Decl. -12.480 

missing R.A. +211.338 Decl. -12.683 (ibex-sun) 

error is R.A. +2.235 Decl. +0.203 

for a total 2.191 deg 

ibex_rotate -o -u -0.853101,-0.474889,-0.216099 -w ibex-sun -t 2017-10-31T22:29:47.794Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.853101,-0.474889,-0.216099 

which is R.A. +209.103 Decl. -12.480 

missing R.A. +215.966 Decl. -14.306 (ibex-sun) 

error is R.A. +6.863 Decl. +1.826 

for a total 6.921 deg 

No Lo O-mode. 

There is no overlap with orbit 383 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: Thursday, October 5, 2017 12:44:57 PM 
Subject: IBEX Orbit# 384 ATS (18 Oct 17 - 27 Oct 17) 

Guys, 

Here are the planning files and ATS for Orbit# 384. 

Please respond to this email thread with your comments and approvals 

Approvals are required before 6 Oct 17 @1200 UTC 

Note the following: 

1. APL-18 SSR_Dump Contact (2-320k) 

SetRelay stx,on $TIME=2017/10:27:03:58:00 

SetDownlink2K $TIME=2017/10:27:03:58:02 

Set_SetBilevelOutputControlReg STXMODE_Strobe,ON $TIME=2017/10:27:03:58:04 

SetBilevelOutputControlReg COHERENT,ON $TIME=2017/10:27:03:58:06 

SetDownlink320K $TIME=2017/10:27:04:05:00 

SSR_DUMP_NEW $TIME=2017/10:27:04:10:00 

SetRelay stx,off $TIME=2017/10:27:05:02:00 

2. IBEX_Hi Gain Test 

Orbit# 384 APOGEE: IBEX_Hi Gain Test (19 Oct 17 @10:19:19:30:36 - 10:19:23:45:41) 

3. Command Load Constraint Violation Report 

IBEX_2017_291_o0384a_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 2017/10/18 15:41:33 UTC 

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

transition to science mode at 2017/10/22 11:56:19 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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