[Isocops] IBEX Orbit# 243 ATS (13 Apr 14 - 22 Apr 14) - v001 approval

Fri Apr 4 12:02:35 EDT 2014

All, 

I have looked at the orbit 243 ATS, 

IBEX_2014_103_o0243a_v001.scr, 

and I approve. 

The only constraint violation in 

IBEX_2014_103_o0243a_v001.ccvr 

is related to the eclipse at the start of the orbit and is expected. 

The PL commands in the v001 ATS match those in the v003 STF, 

IBEX_2014_103_o0243a_v003.stf, 

except that the ATS has an SSR_DUMP_NEW command. However, 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_2014_103_o0243a_v001.oef, 

and as verified with ibex_orbit. 

The Hi ABAB command sequences and timing look reasonable. 

There are two star tracker outages. The first starts 2 1/2+ days after 15 Re ascending and ends 3+ days later. The second starts about a day after the first outage ends and ends 1+ days later. Some despinning may be required due to these outages. 

There are no moon in Lo FOV sessions. 

The ground station command sequence is correct and the timing and bit rate match those in the contacts file, 

IBEX_Orbit243Contacts.txt, 

for the SSR dump contact. All other contacts this orbit will be blind acquisitions. 

No battery cell balancing this orbit; we'll do it again in the next orbit. 

The sun precession maneuver at perigee of orbit 242 left us pointing in safe directions for the orbit 243 arc A ascending and descending sequences: 

ibex_rotate -o -r +21.261 -d +8.943 -w ibex-sun -t 2014/04:14:02:19:37 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.920609,+0.358209,+0.155452 

which is R.A. +21.261 Decl. +8.943 

missing R.A. +22.110 Decl. +9.263 (ibex-sun) 

error is R.A. +0.849 Decl. +0.320 

for a total 0.897 deg 

ibex_rotate -o -r +21.261 -d +8.943 -w ibex-sun -t 2014/04:18:02:18:05 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.920609,+0.358209,+0.155452 

which is R.A. +21.261 Decl. +8.943 

missing R.A. +25.908 Decl. +10.691 (ibex-sun) 

error is R.A. +4.647 Decl. +1.748 

for a total 4.901 deg 

The sun 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 -r +25.978 -d +10.717 -w ibex-sun -t 2014/04:18:04:06:13 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.883282,+0.430386,+0.185958 

which is R.A. +25.978 Decl. +10.717 

missing R.A. +25.978 Decl. +10.717 (ibex-sun) 

error is R.A. +0.000 Decl. +0.000 

for a total 0.000 deg 

ibex_rotate -o -r +25.978 -d +10.717 -w ibex-sun -t 2014/04:18:05:36:19 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.883282,+0.430386,+0.185958 

which is R.A. +25.978 Decl. +10.717 

missing R.A. +26.035 Decl. +10.739 (ibex-sun) 

error is R.A. +0.057 Decl. +0.022 

for a total 0.060 deg 

ibex_rotate -o -r +25.978 -d +10.717 -w ibex-sun -t 2014/04:22:06:04:41 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.883282,+0.430386,+0.185958 

which is R.A. +25.978 Decl. +10.717 

missing R.A. +29.656 Decl. +12.115 (ibex-sun) 

error is R.A. +3.678 Decl. +1.398 

for a total 3.867 deg 

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 244 apogee: 

ibex_rotate -o -u 0.865624,0.463229,0.190038 -w ibex-sun -t 2014/04:22:08:23:12 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.865624,+0.463229,+0.190038 

which is R.A. +28.153 Decl. +10.955 

missing R.A. +29.742 Decl. +12.147 (ibex-sun) 

error is R.A. +1.590 Decl. +1.192 

for a total 1.961 deg 

ibex_rotate -o -u 0.865624,0.463229,0.190038 -w ibex-sun -t 2014-04-27T07:39:55.557Z 

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

points axis +1.000000,+0.000000,+0.000000 

towards ECI +0.865624,+0.463229,+0.190038 

which is R.A. +28.153 Decl. +10.955 

missing R.A. +34.559 Decl. +13.781 (ibex-sun) 

error is R.A. +6.406 Decl. +2.826 

for a total 6.865 deg 

No Lo O-mode. 

There is no overlap with orbit 242 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: "Ibex Mission Operations" <ibexops at gmail.com> 
To: joe at boulder.swri.edu, "IBEX-FDG" <IBEX.fdg at applieddefense.com>, "IBEXOPS/ORB" <IBEXops at orbital.com>, "ISOC at New Hampshire" <isocops at lists.sr.unh.edu>, "John Cavallo" <cavallo.john at orbital.com>, "Ken Fairchild" <fair-play at comcast.net>, "Mark Tapley" <mtapley at swri.edu>, "Nigel Angold" <ngangold at earthlink.net>, "Robert Lockwood" <Lockwood.Robert at Orbital.com>, "Roland Vanderspek" <roland at space.mit.edu>, "Ryan Tyler" <tyler.ryan at orbital.com>, "Sheral Wesley" <wesley.sheral at orbital.com>, "Thomas Regiec" <regiec.thomas at orbital.com>, "Tim Perry" <perry.tim at orbital.com> 
Sent: Tuesday, April 1, 2014 6:48:20 PM 
Subject: IBEX Orbit# 243 ATS (13 Apr 14 - 22 Apr 14) 

Guys, 
Here are the planning files and ATS for Orbit# 243. 
Please respond to this email thread with any comments and approvals. 
Approvals are required before 7 Apr 14 @1800 UTC 

Please note the following: 
1. Apogee Sun Maneuver 

2. APL-18 SSR_Dump/Tracking Contact 

3. Special Ops/Post-LUT Changes 
Hi negative collimator voltage set to 1400 
Hi ABAB (CEM comparison) 

4. Command Load Constraint Violation Report (CCVR) 
# IBEX_2014_103_o0243a_v001.scr 
========================== 
HARD CONSTRAINT VIOLATIONS 
========================== 
NO VIOLATIONS. 
========================== 
SOFT CONSTRAINT VIOLATIONS 
========================== 
IBX-CLC-015: Battery charge falls below minimum from 2014/04/13 23:47:28 UTC - 
2014/04/14 01:20:33 UTC. Lowest charge level is 5303.792918 
watt-minutes during this interval. 

Orbit# 242 PERIGEE: Moderate Eclipse Commands 
# 2014-04-13T22:14:01.382Z,PenumbraEntry,orbit:242 
# 2014-04-13T22:14:01.382Z,EclipseEntry,moderate:true,long:false,orbit:242 
ECT_SetLongEclipseFlag TRUE $TIME=2014/04:13:20:14:00 

# 2014-04-13T23:47:28.863Z,PenumbraExit,orbit:242 
# 2014-04-13T23:47:28.863Z,EclipseExit,moderate:true,long:false,orbit:242 
ECT_SetLongEclipseFlag FALSE $TIME=2014/04:14:00:30:00 
============== 
OTHER MESSAGES 
============== 
NO MESSAGES. 

-- 

Sheral R. Wesley 
SPVR., Satellite Operations 
IBEX Mission OPS 
CYGNUS Mission Planning 
(304) 279-6678 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.sr.unh.edu/mailman/private/isocops/attachments/20140404/c2a21d66/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev13b-o0243_KWF.doc
Type: application/msword
Size: 112640 bytes
Desc: not available
Url : http://lists.sr.unh.edu/mailman/private/isocops/attachments/20140404/c2a21d66/IBEX-Command-Approval-Checklist-Rev13b-o0243_KWF-0001.doc 