[Isocops] IBEX Orbit# 307 ATS v002 Approval (18 Nov 15 - 27 Nov 15) - v002 approval
Ken Fairchild
fair-play at comcast.net
Thu Nov 5 20:03:25 EST 2015
All,
I have looked at the orbit 307 ATS,
IBEX_2015_322_o0307a_v002.scr,
and I approve.
There are no constraint violations in
IBEX_2015_322_o0307a_v002.ccvr.
The PL commands in the v002 ATS match those in the v002 STF,
IBEX_2015_322_o0307a_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_2015_322_o0307a_v001.oef,
and as verified with ibex_orbit.
There are three star tracker outages. The first starts about 4 1/2 hours after we ascend in arc A and runs for about 14 hours. The second starts about 2 days after the first outage ends and ends about 3 days later. The third starts about 2 hours after we descend in arc B and runs for almost a day. Some despinning may be required due to these outages.
There is one moon in Lo FOV session. The ATS and OEF start times are almost identical. The ATS end time is about 2 hours after that in the OEF. This difference is not unusual.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit307_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 306 left us pointing in safe directions for the orbit 307 arc A ascending and descending sequences:
ibex_rotate -o -u -0.606076,-0.725836,-0.325321 -w ibex-sun -t 2015/11:18:14:09:29
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.606076,-0.725836,-0.325321
which is R.A. +230.138 Decl. -18.985
missing R.A. +233.387 Decl. -19.196 (ibex-sun)
error is R.A. +3.249 Decl. +0.211
for a total 3.078 deg
ibex_rotate -o -u -0.606076,-0.725836,-0.325321 -w ibex-sun -t 2015/11:22:13:17:37
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.606076,-0.725836,-0.325321
which is R.A. +230.138 Decl. -18.985
missing R.A. +237.394 Decl. -20.096 (ibex-sun)
error is R.A. +7.256 Decl. +1.111
for a total 6.927 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 +237.472 -d -20.111 -w ibex-sun -t 2015/11:22:15:05:45
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.504926,-0.791722,-0.343840
which is R.A. +237.472 Decl. -20.111
missing R.A. +237.472 Decl. -20.111 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +237.472 -d -20.111 -w ibex-sun -t 2015/11:22:16:35:51
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.504926,-0.791722,-0.343840
which is R.A. +237.472 Decl. -20.111
missing R.A. +237.537 Decl. -20.124 (ibex-sun)
error is R.A. +0.065 Decl. +0.013
for a total 0.062 deg
ibex_rotate -o -r +237.472 -d -20.111 -w ibex-sun -t 2015/11:26:14:34:30
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.504926,-0.791722,-0.343840
which is R.A. +237.472 Decl. -20.111
missing R.A. +241.770 Decl. -20.890 (ibex-sun)
error is R.A. +4.298 Decl. +0.779
for a total 4.100 deg
The sun precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 308 apogee:
ibex_rotate -o -r +241.888 -d -20.911 -w ibex-sun -t 2015/11:26:17:02:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.440162,-0.823934,-0.356917
which is R.A. +241.888 Decl. -20.911
missing R.A. +241.888 Decl. -20.911 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +241.888 -d -20.911 -w ibex-sun -t 2015-12-01T16:41:37.188Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.440162,-0.823934,-0.356917
which is R.A. +241.888 Decl. -20.911
missing R.A. +247.135 Decl. -21.808 (ibex-sun)
error is R.A. +5.247 Decl. +0.897
for a total 4.967 deg
No Lo O-mode.
There is no overlap with orbit 306 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: "Wesley.Sheral" <sheral.wesley at orbitalatk.com>, "Bret Hautamaki" <bhautama at gmail.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>, "Marty Quinn" <marty.quinn at unh.edu>, "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: Thursday, November 5, 2015 11:06:11 AM
Subject: IBEX Orbit# 307 ATS v002 Approval (18 Nov 15 - 27 Nov 15)
Guys,
I have generated v002 of the Orbit# 307 ATS.
The battery balancing times commands were added and the start of the planning period changed, which cleared up the overlapping violations in the previous v001 report.
Please respond to this email thread with questions/comments and approvals.
Approvals are required before 8 Nov 15 @ 0700 UTC
Please note the following:
1. Apogee Sun Maneuver
2. Perigee Sun Maneuver
3. Moon in Lo FOV
# 2015-11-18T15:47:46.247Z,MoonInLoFovStart,orbit:307
# 2015-11-18T15:59:14.405Z,MoonInLoFovStop,orbit:307
4. Orbit# 307 APOGEE: IBEX-Lo Gain Test (26 Nov 15 @0530-1001 UTC)
5. PERIGEE Battery Balancing Commands
# 2015-11-27T02:27:36.860Z,Perigee,orbit:307
SetLongEclipseFlag TRUE $TIME=2015/11:27:02:00:00
SetLongEclipseFlag FALSE $TIME=2015/11:27:03:30:00
6. Command Load Constraint Violation Report
IBEX_2015_322_o0307a_v002.scr
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==============
OTHER MESSAGES
==============
NO MESSAGES.
Sheral R. Wesley
SPVR., Satellite Operations
IBEX Mission OPS
CRS/CYGNUS Mission Planning
Cell (202) 236-0802
From: Wesley.Sheral
Sent: Wednesday, November 04, 2015 7:54 PM
To: Bret Hautamaki; David Heirtzler; IBEX-FDG; IBEXOPS; ISOC; Ken Fairchild; Lockwood.Robert; Marty Quinn; Michelle Reno; Nigel Angold; Paul Janzen; Perry.Tim; Tyler.Ryan; Wesley.Sheral
Subject: IBEX Orbit# 307 ATS Approval (18 Nov 15 - 27 Nov 15)
Guys,
Here are the planning files and ATS for Orbit# 307 .
Please respond to this email thread with questions/comments and approvals.
Approvals are required before 8 Nov 15 @ 0700 UTC
Please note the following:
1. Apogee Sun Maneuver
2. Perigee Sun Maneuver
3. Moon in Lo FOV
# 2015-11-18T15:47:46.247Z,MoonInLoFovStart,orbit:307
# 2015-11-18T15:59:14.405Z,MoonInLoFovStop,orbit:307
4. Orbit# 307 APOGEE: IBEX-Lo Gain Test (26 Nov 15 @0530-1001 UTC)
5. Command Load Constraint Violation Report (CCVR)
IBEX_2015_322_o0307a_v001.scr
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
IBX-CLC-008: Spacecraft state is HK during interval 2015/11/18 14:09:29 UTC -
2015/11/18 14:24:41 UTC, which overlaps HVSCI payload mode at
2015/11/18 14:09:29 UTC - 2015/11/18 14:24:41 UTC
IBX-CLC-008: Spacecraft state is HK during interval 2015/11/18 14:24:41 UTC -
2015/11/22 13:17:37 UTC, which overlaps HVSCI payload mode at
2015/11/18 14:24:41 UTC - 2015/11/22 13:17:37 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Sheral R. Wesley
SPVR., Satellite Operations
IBEX Mission OPS
CRS/CYGNUS Mission Planning
Cell (202) 236-0802
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