[Isocops] IBEX Orbit# 209 ATS (9 Jun 13 - 18 Jun 13) - v001 approval
fair-play at comcast.net
fair-play at comcast.net
Wed May 29 10:58:22 EDT 2013
All,
I have looked at the orbit 209 ATS,
IBEX_2013_160_o0209a_v001.scr,
and I approve.
There are no constraint violations in
IBEX_2013_160_o0209a_v001.ccvr.
The PL commands in the v001 ATS match those in the v002 STF,
IBEX_2013_160_o0209a_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 file,
IBEX_2013_160_o0209a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. It starts about 1/2 hour after 15 Re descending and ends about 7 hours after the maneuver window opens (thus delaying the perigee maneuver).
There is one moon in Lo FOV session in arc B. The ATS start time is about 1 1/2 hours after that in the OEF and the ATS stop time is about 3 1/4 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_Orbit209Contacts.txt,
for all contacts (3).
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 208 left us pointing in safe directions for orbit 209 arc A ascending and descending sequences:
ibex_rotate -o -u 0.237743,0.89514,0.377097 -w ibex-sun -t 2013/06:09:19:20:51
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.237743,+0.895140,+0.377097
which is R.A. +75.126 Decl. +22.154
missing R.A. +77.935 Decl. +22.974 (ibex-sun)
error is R.A. +2.809 Decl. +0.820
for a total 2.720 deg
ibex_rotate -o -u 0.237743,0.89514,0.377097 -w ibex-sun -t 2013/06:13:07:56:38
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.237743,+0.895140,+0.377097
which is R.A. +75.126 Decl. +22.154
missing R.A. +81.706 Decl. +23.186 (ibex-sun)
error is R.A. +6.580 Decl. +1.032
for a total 6.158 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 0.164968,0.908842,0.383135 -w ibex-sun -t 2013/06:13:09:39:46
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.164968,+0.908842,+0.383135
which is R.A. +79.712 Decl. +22.528
missing R.A. +81.782 Decl. +23.190 (ibex-sun)
error is R.A. +2.070 Decl. +0.662
for a total 2.019 deg
ibex_rotate -o -u 0.164968,0.908842,0.383135 -w ibex-sun -t 2013/06:13:11:14:52
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.164968,+0.908842,+0.383135
which is R.A. +79.712 Decl. +22.528
missing R.A. +81.851 Decl. +23.193 (ibex-sun)
error is R.A. +2.139 Decl. +0.665
for a total 2.081 deg
ibex_rotate -o -u 0.164968,0.908842,0.383135 -w ibex-sun -t 2013/06:17:19:05:41
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.164968,+0.908842,+0.383135
which is R.A. +79.712 Decl. +22.528
missing R.A. +86.271 Decl. +23.393 (ibex-sun)
error is R.A. +6.559 Decl. +0.865
for a total 6.100 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 210 apogee:
ibex_rotate -o -u 0.089936,0.91773,0.386888 -w ibex-sun -t 2013/06:18:04:39:06
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.089936,+0.917730,+0.386888
which is R.A. +84.403 Decl. +22.761
missing R.A. +86.649 Decl. +23.408 (ibex-sun)
error is R.A. +2.246 Decl. +0.647
for a total 2.165 deg
ibex_rotate -o -u 0.089936,0.91773,0.386888 -w ibex-sun -t 2013-06-22T17:06:04.449Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.089936,+0.917730,+0.386888
which is R.A. +84.403 Decl. +22.761
missing R.A. +91.451 Decl. +23.398 (ibex-sun)
error is R.A. +7.048 Decl. +0.637
for a total 6.514 deg
No Lo O-mode.
There is no overlap with orbit 208 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: "Bret Hautamaki" <hautamaki.bret at orbital.com>, "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>, "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: Monday, May 27, 2013 10:19:58 AM
Subject: [Isocops] IBEX Orbit# 209 ATS (9 Jun 13 - 18 Jun 13)
Guys,
Here are the planning files and ATS for Orbit# 209. Plesae respond to this email thread with comments/approvals.
Your comments and approvals are required by 29 May 13 @ 1800 UTC
Note the following:
1. Special Ops: Orbit# 209
CCB held: 2013-05-15
Description: Hi negative collimator voltage set to 1400
2. Battery Balancing at PERIGEE
2013-06-18T07:05:57.852Z,Perigee,orbit:209
3. Moon in Lo FOV
2013-06-15T14:31:05.960Z,MoonInLoFovStart,orbit:209
2013-06-16T17:41:18.306Z,MoonInLoFovStop,orbit:209
4. Command Constraints
# IBEX_2013_160_o0209a_v001.scr
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==============
OTHER MESSAGES
==============
NO MESSAGES.
--
Sheral R. Wesley
SPVR., Satellite Operations
IBEX Mission OPS
(304) 279-6678
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