[Isocops] IBEX Orbit# 330 ATS Approval (14 Jun 16 - 23 Jun 16) - v001 approval

Fri Jun 3 11:18:36 EDT 2016

All, 

I have looked at the orbit 330 ATS, 

IBEX_2016_166_o0330a_v001.scr, 

and I approve. 

The only constraint violations in 

IBEX_2016_166_o0330a_v001.ccvr 

are because we removed the 

ACT_SetSpinPulseProtectEnable Enable 

commands (2) and because of a long SSR dump contact; the violations are expected. 

The PL commands in the v001 ATS match those in the v002 STF, 

IBEX_2016_166_o0330a_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_2016_166_o0330a_v001.oef, 

and as verified with ibex_orbit. 

There are two star tracker outages. The first starts about 2 1/2 days after apogee and runs for about 1 1/2 days. The second starts about 4 1/2 hours before perigee and ends just before perigee. Some despinning may be required due to the first outage. 

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_Orbit330_Contacts.txt, 

for all contacts (4). 

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 329 left us pointing in safe directions for the orbit 330 arc A ascending and descending sequences: 

ibex_rotate -o -u 0.151567,0.910711,0.384231 -w ibex-sun -t 2016/06:14:19:56:10 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.151567,+0.910711,+0.384231 

which is R.A. +80.551 Decl. +22.596 

missing R.A. +83.368 Decl. +23.285 (ibex-sun) 

error is R.A. +2.817 Decl. +0.689 

for a total 2.684 deg 

ibex_rotate -o -u 0.151567,0.910711,0.384231 -w ibex-sun -t 2016/06:18:12:16:03 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.151567,+0.910711,+0.384231 

which is R.A. +80.551 Decl. +22.596 

missing R.A. +87.280 Decl. +23.379 (ibex-sun) 

error is R.A. +6.729 Decl. +0.783 

for a total 6.243 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 0.076223,0.918869,0.387129 -w ibex-sun -t 2016/06:18:13:59:11 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.076223,+0.918869,+0.387129 

which is R.A. +85.258 Decl. +22.776 

missing R.A. +87.356 Decl. +23.381 (ibex-sun) 

error is R.A. +2.098 Decl. +0.605 

for a total 2.022 deg 

ibex_rotate -o -u 0.076223,0.918869,0.387129 -w ibex-sun -t 2016/06:18:15:34:17 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.076223,+0.918869,+0.387129 

which is R.A. +85.258 Decl. +22.776 

missing R.A. +87.426 Decl. +23.383 (ibex-sun) 

error is R.A. +2.168 Decl. +0.607 

for a total 2.084 deg 

ibex_rotate -o -u 0.076223,0.918869,0.387129 -w ibex-sun -t 2016/06:23:02:03:19 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.076223,+0.918869,+0.387129 

which is R.A. +85.258 Decl. +22.776 

missing R.A. +92.021 Decl. +23.441 (ibex-sun) 

error is R.A. +6.763 Decl. +0.665 

for a total 6.255 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 331 apogee: 

ibex_rotate -o -u -0.001479,0.921313,0.388818 -w ibex-sun -t 2016/06:23:04:15:29 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.001479,+0.921313,+0.388818 

which is R.A. +90.092 Decl. +22.881 

missing R.A. +92.109 Decl. +23.439 (ibex-sun) 

error is R.A. +2.017 Decl. +0.558 

for a total 1.937 deg 

ibex_rotate -o -u -0.001479,0.921313,0.388818 -w ibex-sun -t 2016-06-28T03:19:01.895Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.001479,+0.921313,+0.388818 

which is R.A. +90.092 Decl. +22.881 

missing R.A. +97.272 Decl. +23.238 (ibex-sun) 

error is R.A. +7.180 Decl. +0.357 

for a total 6.615 deg 

No Lo O-mode. 

There is no overlap with orbit 329 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: "Wesley.Sheral" <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>, "Lockwood.Robert" <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>, "Perry.Tim" <tim.perry at orbitalatk.com>, "Tyler.Ryan" <ryan.tyler at orbitalatk.com>, "Wesley.Sheral" <sheral.wesley at orbitalatk.com> 
Sent: Wednesday, June 1, 2016 4:23:26 AM 
Subject: IBEX Orbit# 330 ATS Approval (14 Jun 16 - 23 Jun 16) 

Guys, 

Here are the planning files and ATS for Orbit# 330. 

Please respond to this email thread with your comments, questions and approvals 

Approvals are required before 3 June 16 @1800 UTC 

Note the following 

1. New IBEX Rote Change : % valid thresholds after inertial maneuver 

% valid command is now: ACT_SetKFInputSelect STA_PCT_VALID,43,28,33,48 

2. No ACT_SetSpinPulseProtectEnable commands 

3. Battery Balancing at PERIGEE 

Orbit# 330 PERIGEE: Battery Balancing 

# 2016-06-23T13:55:33.240Z,Perigee,orbit:330 

SetLongEclipseFlag TRUE $TIME=2016/06:23:13:00:00 

SetLongEclipseFlag FALSE $TIME=2016/06:23:14:30:00 

4. Command Load Constraint Violation Report 

IBEX_2016_166_o0330a_v001.scr 

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

HARD CONSTRAINT VIOLATIONS 

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

NO VIOLATIONS. 

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

SOFT CONSTRAINT VIOLATIONS 

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

IBX-CLC-006: Planned transmission at 2016/06/23 21:58:00 UTC - 2016/06/23 

23:32:00 UTC exceeds the maximum contiguous transmission time of 

5400 seconds 

· SSR_Dump/Tracking Contact 

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

transition to science mode at 2016/06/14 18:18:43 UTC 

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

transition to science mode at 2016/06/18 15:04:17 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 

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