[Isocops] IBEX Orbit 342 ATS for review (Sept 30 - Oct 9) - v002 approval
Ken Fairchild
fair-play at comcast.net
Tue Sep 20 20:41:57 EDT 2016
All,
I have looked at the orbit 342 ATS,
IBEX_2016_274_o0342a_v002.scr ,
and I approve.
The only constraint violations in
IBEX_2016_274_o0342a_v001.ccvr
are because we removed the
ACT_SetSpinPulseProtectEnable Enable
commands (2); the violations are expected.
The PL commands in the v002 ATS match those in the v002 STF,
IBEX_2016_274_o0342a_v002.stf ,
except that the ATS has an SSR_DUMP_NEW command as well as SSR pointer reset commands . 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_2016_274_o0342a_v001.oef,
and as verified with ibex_orbit.
There are two star tracker outages. The first starts about 5 hours after orbit 341 perigee and ends about an hour after 15 Re ascending. The second starts about 7 hours after perigee and runs for about 4 hours. No despinning should be required due to these outages.
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_Orbit342_Contacts.txt,
for all contacts (3). There is a 5 minute discrepancy between the end time of the APL contact in the contacts file and the ATS. I checked with Tim and evidently the contacts file is incorrect.
No battery cell balancing this orbit; we'll do it again in the next orbit.
The inertial maneuver at perigee of orbit 341 left us pointing in safe directions for the orbit 342 arc A ascending and descending sequences:
ibex_rotate -o -u -0.995985,-0.077826,-0.04423 -w ibex-sun -t 2016/09:30:23:51:39
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.995985,-0.077826,-0.044230
which is R.A. +184.468 Decl. -2.535
missing R.A. +187.348 Decl. -3.191 (ibex-sun)
error is R.A. +2.880 Decl. +0.656
for a total 2.951 deg
ibex_rotate -o -u -0.995985,-0.077826,-0.04423 -w ibex-sun -t 2016/10:04:10:32:16
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.995985,-0.077826,-0.044230
which is R.A. +184.468 Decl. -2.535
missing R.A. +190.375 Decl. -4.498 (ibex-sun)
error is R.A. +5.907 Decl. +1.963
for a total 6.214 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 -0.986406,-0.146381,-0.074665 -w ibex-sun -t 2016/10:04:12:12:29
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.986406,-0.146381,-0.074665
which is R.A. +188.441 Decl. -4.282
missing R.A. +190.438 Decl. -4.525 (ibex-sun)
error is R.A. +1.997 Decl. +0.243
for a total 2.006 deg
ibex_rotate -o -u -0.986406,-0.146381,-0.074665 -w ibex-sun -t 2016/10:04:13:50:30
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.986406,-0.146381,-0.074665
which is R.A. +188.441 Decl. -4.282
missing R.A. +190.500 Decl. -4.550 (ibex-sun)
error is R.A. +2.059 Decl. +0.268
for a total 2.071 deg
ibex_rotate -o -u -0.986406,-0.146381,-0.074665 -w ibex-sun -t 2016/10:08:20:15:30
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.986406,-0.146381,-0.074665
which is R.A. +188.441 Decl. -4.282
missing R.A. +194.521 Decl. -6.183 (ibex-sun)
error is R.A. +6.080 Decl. +1.901
for a total 6.346 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 343 apogee:
ibex_rotate -o -u -0.971114,-0.214917,-0.103678 -w ibex-sun -t 2016/10:08:22:30:34
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.971114,-0.214917,-0.103678
which is R.A. +192.479 Decl. -5.951
missing R.A. +194.612 Decl. -6.221 (ibex-sun)
error is R.A. +2.133 Decl. +0.270
for a total 2.138 deg
ibex_rotate -o -u -0.971114,-0.214917,-0.103678 -w ibex-sun -t 2016-10-13T18:15:13.814Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.971114,-0.214917,-0.103678
which is R.A. +192.479 Decl. -5.951
missing R.A. +198.925 Decl. -8.033 (ibex-sun)
error is R.A. +6.446 Decl. +2.082
for a total 6.728 deg
No Lo O-mode.
There is no overlap with orbit 341 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: "Perry.Tim" <tim.perry at orbitalatk.com>
To: "David Heirtzler" <dfh at cisunix.unh.edu>, "IBEX-FDG" <IBEX.fdg at applieddefense.com>, "IBEXOPS" <IBEXOPS at gmail.com>, "ISOC at New Hampshire" <isocops at lists.sr.unh.edu>, "Ken Fairchild" <fair-play at comcast.net>, "Lockwood.Robert" <robert.lockwood at orbitalatk.com>, "Nigel Angold" <nigel.angold at nasa.gov>, "Paul Janzen" <paul.janzen at umontana.edu>, "Perry.Tim" <tim.perry at orbitalatk.com>, "Michelle Reno" <mreno at swri.edu>, "Tyler.Ryan" <ryan.tyler at orbitalatk.com>, "Wesley.Sheral" <sheral.wesley at orbitalatk.com>
Sent: Saturday, September 17, 2016 7:55:03 AM
Subject: IBEX Orbit 342 ATS for review (Sept 30 - Oct 9)
All,
Attached are the planning products for Orbit #342
Please respond to this email thread with your comments and approvals by COB Sept 19.
Note the following:
1. No Battery Balancing this orbit.
2. # Input files: 1
# IBEX_2016_274_o0342a_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 2016/09/30 22:19:26 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2016/10/04 13:20:30 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Timothy E.Perry
CRS, IBEX & OCO-2
Mission Operations
tim.perry at orbitalatk.com
Office (703) 406-5976
Cell (301) 606-1430
Corp Cell (571)-447-8977
Notice: This e-mail is intended solely for use of the individual or entity to which it is addressed and may contain information that is proprietary, privileged and exempt from disclosure under applicable law. If the reader is not the intended recipient or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. This communication may also contain data subject to U.S. export laws. If so, data subject to the International Traffic in Arms Regulation cannot be disseminated, distributed, transferred, or copied, whether incorporated or in its original form, to foreign nationals, residing in the U.S. or abroad, absent the express prior approval of the U.S. Department of State. Data subject to the Export Administration Act may not be disseminated, distributed, transferred or copied contrary to U. S. Department of Commerce regulations. If you have received this communication in error, please notify the sender by reply e-mail and destroy the e-mail message and any physical copies made of the communication.
Thank you.
*********************
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