[Isocops] IBEX ORbit# 357 ATS Approval (15 Feb 17 - 24 Feb 17) - v003 approval
Ken Fairchild
fair-play at comcast.net
Sat Feb 4 10:01:13 EST 2017
All,
I have looked at the orbit 357 ATS,
IBEX_2017_046_o0357a_v003.scr ,
and I approve.
The only constraint violations in
IBEX_2017_046_o0357a_v001.ccvr
are because we removed the
ACT_SetSpinPulseProtectEnable Enable
commands (2); the violations are expected.
The PL commands in the v003 ATS match those in the v003 STF,
IBEX_2017_046_o0357a_v003.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_2017_046_o0357a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. The outage starts about 15 1/2 hours after apogee and runs for almost 3 days. Some despinning may be required due to this outage.
There is a moon in Lo FOV session in arc B. The ATS start time is 2 1/2 hours after that in the OEF and the ATS end time is about an hour 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_Orbit357_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 356 left us pointing in safe directions for the orbit 357 arc A ascending and descending sequences:
ibex_rotate -o -u 0.838433,-0.453812,-0.301804 -w ibex-sun -t 2017/02:15:19:23:02
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.838433,-0.453812,-0.301804
which is R.A. +331.575 Decl. -17.566
missing R.A. +329.309 Decl. -12.496 (ibex-sun)
error is R.A. +2.266 Decl. +5.070
for a total 5.522 deg
ibex_rotate -o -u 0.838433,-0.453812,-0.301804 -w ibex-sun -t 2017/02:19:10:25:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.838433,-0.453812,-0.301804
which is R.A. +331.575 Decl. -17.566
missing R.A. +332.864 Decl. -11.217 (ibex-sun)
error is R.A. +1.289 Decl. +6.349
for a total 6.471 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 0.845686,-0.485839,-0.220851 -w ibex-sun -t 2017/02:19:12:08:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.845686,-0.485839,-0.220851
which is R.A. +330.123 Decl. -12.759
missing R.A. +332.932 Decl. -11.191 (ibex-sun)
error is R.A. +2.809 Decl. +1.568
for a total 3.164 deg
ibex_rotate -o -u 0.845686,-0.485839,-0.220851 -w ibex-sun -t 2017/02:19:13:43:21
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.845686,-0.485839,-0.220851
which is R.A. +330.123 Decl. -12.759
missing R.A. +332.995 Decl. -11.167 (ibex-sun)
error is R.A. +2.872 Decl. +1.592
for a total 3.229 deg
ibex_rotate -o -u 0.845686,-0.485839,-0.220851 -w ibex-sun -t 2017/02:24:00:02:26
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.845686,-0.485839,-0.220851
which is R.A. +330.123 Decl. -12.759
missing R.A. +337.117 Decl. -9.546 (ibex-sun)
error is R.A. +6.994 Decl. +3.213
for a total 7.576 deg
The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 358 apogee:
ibex_rotate -o -u 0.920309,-0.354749,-0.164875 -w ibex-sun -t 2017/02:24:02:13:41
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.920309,-0.354749,-0.164875
which is R.A. +338.920 Decl. -9.490
missing R.A. +337.204 Decl. -9.514 (ibex-sun)
error is R.A. +1.716 Decl. +0.024
for a total 1.693 deg
ibex_rotate -o -u 0.920309,-0.354749,-0.164875 -w ibex-sun -t 2017-02-28T23:46:27.203Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.920309,-0.354749,-0.164875
which is R.A. +338.920 Decl. -9.490
missing R.A. +341.940 Decl. -7.681 (ibex-sun)
error is R.A. +3.020 Decl. +1.809
for a total 3.492 deg
Lo O-mode in arc A (plan 6, 7, 1, 1). O-mode timing matches that specified in the ISN season memo. There is more than 1 hour between the end of the ascending sequence and the start of O-mode and also more than an hour after O-mode ends and the start of the descending sequence.
There is no overlap with orbit 356 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: "Sheral Wesley" <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>, "Ken Fairchild" <kwfairchild at gmail.com>, "Robert Lockwood" <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>, "Timothy Perry" <Timothy.Perry at OrbitalATK.com>, "Ryan Tyler" <Ryan.Tyler at OrbitalATK.com>, "Sheral Wesley" <Sheral.Wesley at OrbitalATK.com>
Sent: Wednesday, February 1, 2017 5:57:35 PM
Subject: IBEX ORbit# 357 ATS Approval (15 Feb 17 - 24 Feb 17)
Guys,
Here are the planning files and ATS for Orbit# 357.
Please respond to this email thread with your comments and approvals.
Approvals are required before 4 Feb 17 @1800 UTC
Note the following:
1. IBEX_Lo O-mode (cross calibration)
2. Moon in LO FOV Commands
2017-02-21T12:44:17.095Z,MoonInLoFovStart,orbit:357
2017-02-22T07:06:08.366Z,MoonInLoFovStop,orbit:357
3. Command Load Constraint Violation Report
IBEX_2017_046_o0357a_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 2017/02/15 17:45:56 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2017/02/19 13:13:21 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
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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