[Isocops] IBEX ORbit# 335 ATS Approval (30 Jul 16 - 8 Aug 16) - v001 approval
Ken Fairchild
fair-play at comcast.net
Tue Jul 19 13:15:15 EDT 2016
All,
I have looked at the orbit 335 ATS,
IBEX_2016_212_o0335a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2016_212_o0335a_v001.ccvr
are because we removed the
ACT_SetSpinPulseProtectEnable Enable
commands (2); the violations are expected.
The PL commands in the v001 ATS match those in the v002 STF,
IBEX_2016_212_o0335a_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_212_o0335a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. The outage starts about an hour before perigee and runs for 6+ hours. No despinning should be required due to this 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_Orbit335_Contacts.txt,
for all contacts (3).
No battery cell balancing this orbit; we'll do it again in the next orbit.
The inertial maneuver at perigee of orbit 334 left us pointing in safe directions for the orbit 335 arc A ascending and descending sequences:
ibex_rotate -o -u -0.570424,0.75739,0.317768 -w ibex-sun -t 2016/07:30:12:05:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.570424,+0.757390,+0.317768
which is R.A. +126.985 Decl. +18.528
missing R.A. +129.890 Decl. +18.381 (ibex-sun)
error is R.A. +2.905 Decl. +0.147
for a total 2.760 deg
ibex_rotate -o -u -0.570424,0.75739,0.317768 -w ibex-sun -t 2016/08:03:01:32:14
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.570424,+0.757390,+0.317768
which is R.A. +126.985 Decl. +18.528
missing R.A. +133.343 Decl. +17.465 (ibex-sun)
error is R.A. +6.358 Decl. +1.063
for a total 6.139 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 -0.629889,0.716635,0.299457 -w ibex-sun -t 2016/08:03:03:15:22
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.629889,+0.716635,+0.299457
which is R.A. +131.314 Decl. +17.425
missing R.A. +133.413 Decl. +17.446 (ibex-sun)
error is R.A. +2.099 Decl. +0.021
for a total 2.003 deg
ibex_rotate -o -u -0.629889,0.716635,0.299457 -w ibex-sun -t 2016/08:03:04:50:28
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.629889,+0.716635,+0.299457
which is R.A. +131.314 Decl. +17.425
missing R.A. +133.478 Decl. +17.429 (ibex-sun)
error is R.A. +2.164 Decl. +0.004
for a total 2.065 deg
ibex_rotate -o -u -0.629889,0.716635,0.299457 -w ibex-sun -t 2016/08:07:14:39:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.629889,+0.716635,+0.299457
which is R.A. +131.314 Decl. +17.425
missing R.A. +137.785 Decl. +16.258 (ibex-sun)
error is R.A. +6.471 Decl. +1.167
for a total 6.302 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 336 apogee:
ibex_rotate -o -u -0.688092,0.669538,0.279728 -w ibex-sun -t 2016/08:07:16:48:59
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.688092,+0.669538,+0.279728
which is R.A. +135.783 Decl. +16.244
missing R.A. +137.869 Decl. +16.233 (ibex-sun)
error is R.A. +2.086 Decl. +0.011
for a total 2.003 deg
ibex_rotate -o -u -0.688092,0.669538,0.279728 -w ibex-sun -t 2016-08-12T14:03:05.446Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.688092,+0.669538,+0.279728
which is R.A. +135.783 Decl. +16.244
missing R.A. +142.417 Decl. +14.781 (ibex-sun)
error is R.A. +6.634 Decl. +1.463
for a total 6.557 deg
No Lo O-mode.
There is no overlap with orbit 334 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: Monday, July 18, 2016 1:13:31 AM
Subject: IBEX ORbit# 335 ATS Approval (30 Jul 16 - 8 Aug 16)
Here are the planning files and ATS for Orbit# 335.
Please respond to this email thread with your comments and approvals
Approvals are required before 19 July 16 @ 2200 UTC
Note the following:
1. No Battery Balancing at PERIGEE
2. Command Load Constraint Violation Report
IBEX_2016_212_o0335a_v001.scr
==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.
==========================
SOFT CONSTRAINT VIOLATIONS
==========================
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2016/07/30 10:42:28 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2016/08/03 04:20:28 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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