[Isocops] IBEX Orbit# 333 ATS Approval v002 ( 11 Jul 16 - 21 Jul 16) - v002 approval

Fri Jul 1 02:00:03 EDT 2016

All, 

I have looked at the orbit 333 ATS, 

IBEX_2016_193_o0333a_v002.scr, 

and I approve. 

The only constraint violations in 

IBEX_2016_193_o0333a_v002.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 v002 ATS match those in the v002 STF, 

IBEX_2016_193_o0333a_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_193_o0333a_v001.oef, 

and as verified with ibex_orbit. 

There is one star tracker outage. The outage starts about 15 hours before 15 Re descending and ends about 2 1/2 hours after perigee (delaying the perigee maneuver). Some despinning may be required due to this outage. 

There is one long moon in Lo FOV session in the OEF; there are two sessions in the ATS. The sessions start in arc A and run into arc B. The start time of the first ATS session is 2 1/2 hours before that in the OEF; the end time of the second ATS session is about 4 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_Orbit333_Contacts_v002.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 332 left us pointing in safe directions for the orbit 333 arc A ascending and descending sequences: 

ibex_rotate -o -u -0.302078,0.878444,0.370249 -w ibex-sun -t 2016/07:12:10:35:05 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.302078,+0.878444,+0.370249 

which is R.A. +108.977 Decl. +21.731 

missing R.A. +111.897 Decl. +21.897 (ibex-sun) 

error is R.A. +2.920 Decl. +0.166 

for a total 2.716 deg 

ibex_rotate -o -u -0.302078,0.878444,0.370249 -w ibex-sun -t 2016/07:16:00:59:09 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.302078,+0.878444,+0.370249 

which is R.A. +108.977 Decl. +21.731 

missing R.A. +115.575 Decl. +21.323 (ibex-sun) 

error is R.A. +6.598 Decl. +0.408 

for a total 6.150 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 -0.372176,0.85562,0.35972 -w ibex-sun -t 2016/07:16:02:42:17 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.372176,+0.855620,+0.359720 

which is R.A. +113.508 Decl. +21.083 

missing R.A. +115.648 Decl. +21.312 (ibex-sun) 

error is R.A. +2.140 Decl. +0.229 

for a total 2.009 deg 

ibex_rotate -o -u -0.372176,0.85562,0.35972 -w ibex-sun -t 2016/07:16:04:17:23 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.372176,+0.855620,+0.359720 

which is R.A. +113.508 Decl. +21.083 

missing R.A. +115.716 Decl. +21.301 (ibex-sun) 

error is R.A. +2.208 Decl. +0.218 

for a total 2.070 deg 

ibex_rotate -o -u -0.372176,0.85562,0.35972 -w ibex-sun -t 2016/07:20:13:18:15 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.372176,+0.855620,+0.359720 

which is R.A. +113.508 Decl. +21.083 

missing R.A. +120.152 Decl. +20.566 (ibex-sun) 

error is R.A. +6.644 Decl. +0.517 

for a total 6.231 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 334 apogee: 

ibex_rotate -o -u -0.442281,0.826686,0.347819 -w ibex-sun -t 2016/07:21:05:25:40 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.442281,+0.826686,+0.347819 

which is R.A. +118.147 Decl. +20.354 

missing R.A. +120.766 Decl. +20.428 (ibex-sun) 

error is R.A. +2.619 Decl. +0.074 

for a total 2.456 deg 

ibex_rotate -o -u -0.442281,0.826686,0.347819 -w ibex-sun -t 2016-07-25T12:41:57.850Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI -0.442281,+0.826686,+0.347819 

which is R.A. +118.147 Decl. +20.354 

missing R.A. +125.035 Decl. +19.513 (ibex-sun) 

error is R.A. +6.888 Decl. +0.841 

for a total 6.529 deg 

No Lo O-mode. 

There is no overlap with orbit 332 commands by manual inspection or by checking at 

http://ibex.unh.edu/cgi-bin/ats.cgi . 

The last (4th) contact will start shortly before we ascend in orbit 334 and will end after the ascending sequence completes. 

Command Approval Checklist is attached. 

Ken 

----- Original Message -----

From: "Wesley.Sheral" <sheral.wesley at orbitalatk.com> 
To: "Wesley.Sheral" <sheral.wesley 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" <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> 
Sent: Wednesday, June 29, 2016 3:15:09 PM 
Subject: IBEX Orbit# 333 ATS Approval v002 ( 11 Jul 16 - 21 Jul 16) 

Guys, 

Here is v002 of the ATS. Note the following changes: 

1. Replacement of the PERIGEE Battery Balancing 

Orbit# 333 PERIGEE: Battery Balancing 

# 2016-07-21T01:17:35.947Z,Perigee,orbit:333 

@ECT_SetLongEclipseFlag TRUE $TIME=2016/07:21:01:00:00 

@ECT_SetLongEclipseFlag FALSE $TIME=2016/07:21:02:30:00 

2. Change of the second PERIGEE tracking Contact 

Sheral R. Wesley 

IBEX Mission OPS 

CRS/CYGNUS Mission Planning 

Bldg. 2 Room 1337 

Office (703) 406-5641 

Cell (202) 236-0802 

From: Wesley.Sheral 
Sent: Wednesday, June 29, 2016 3:48 AM 
To: David Heirtzler; IBEX-FDG; IBEXOPS; ISOC; Ken Fairchild; Lockwood.Robert; Michelle Reno; Nigel Angold; Paul Janzen; Perry.Tim; Tyler.Ryan; Wesley.Sheral 
Subject: IBEX Orbit# 333 ATS Approval ( 11 Jul 16 - 21 Jul 16) 

Guys, 

Here are the planning files and ATS for Orbit# 333. 

Please respond to this email thread with your comments and approvals 

Approvals are required before 1 Jul 16 @1200 UTC 

Note the following: 

1. Battery Balancing 

· Not at PERIGEE because of the placement of the Inertial Maneuver within the maneuver window (star tracker outage) 

# Orbit# 333 PERIGEE: Battery Balancing 

# 2016-07-21T01:17:35.947Z,Perigee,orbit:333 

@ECT_SetLongEclipseFlag TRUE $TIME=2016/07:20:16:00:00 

@ECT_SetLongEclipseFlag FALSE $TIME=2016/07:20:17:30:00 

2. Moon in Lo FOV Commands 

2016-07-12T14:33:58.324Z,MoonInLoFovStart,orbit:333 

2016-07-16T20:54:09.003Z,MoonInLoFovStop,orbit:333 

3. Command Load Constraint Violation Report 

IBEX_2016_193_o0333a_v001.scr 

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

HARD CONSTRAINT VIOLATIONS 

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

NO VIOLATIONS. 

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

SOFT CONSTRAINT VIOLATIONS 

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

IBX-CLC-006: Planned transmission at 2016/07/20 22:58:00 UTC - 2016/07/21 

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

5400 seconds 

* IBEX,AUWA01,ADD,07/20/16,202,23:00:00,07/21/16,203,00:30:00,,LAHO 160K IBEX-3 Orbit# 333 SSR_Dump/Tracking Contact (10 Desc)* 

IBX-CLC-006: Planned transmission at 2016/07/21 02:58:00 UTC - 2016/07/21 

04:02:00 UTC is preceded by one or more additional transmissions 

which, when combined, exceed the maximum transmission time of 5400 

seconds within a 18000-second window (total planned transmission 

time this window is 9480.000 seconds) 

* IBEX,USHI01,ADD,07/21/16,203,03:00:00,07/21/16,203,04:00:00,,LAHO 64K IBEX-3 Orbit# 333 Tracking Contact (9 Asc)* 

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

transition to science mode at 2016/07/12 09:06:25 UTC 

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

transition to science mode at 2016/07/16 03:47:23 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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