[Isocops] IBEX Orbit# 395 ATS Approval (26 Jan 18 - 4 Feb 18) - v001 approval
Ken Fairchild
fair-play at comcast.net
Sun Jan 14 20:50:28 EST 2018
All,
Note: Angle at orbit 395 arc B descending after the apogee sun precession maneuver: 4.043 deg
I have looked at the orbit 395 ATS,
IBEX_2018_026_o0395a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2018_026_o0395a_v001.ccvr
are from the removal of the
ACT_SetSpinPulseProtectEnable Enable
commands (2); the violations are expected.
The PL commands in the v001 ATS match those in the v002 STF,
IBEX_2018_026_o0395a_v002.stf.
Ascending and descending command sequences are consistent with each other, 15 Re ascending, the apogee maneuver time and 15 Re descending as determined from the OEF,
IBEX_2018_026_o0395a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. The outage starts 1+ days before apogee and runs 4+ days. Some despinning may 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_Orbit395_Contacts.txt,
for all contacts (3).
We are not doing battery cell balancing this orbit; we'll do it again in the next orbit.
The inertial maneuver at perigee of orbit 394 left us pointing in safe directions for the orbit 395 arc A ascending and descending sequences:
ibex_rotate -o -u 0.538574,-0.769221,-0.343856 -w ibex-sun -t 2018/01:26:12:20:03
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.538574,-0.769221,-0.343856
which is R.A. +304.998 Decl. -20.112
missing R.A. +308.665 Decl. -18.726 (ibex-sun)
error is R.A. +3.667 Decl. +1.386
for a total 3.726 deg
ibex_rotate -o -u 0.538574,-0.769221,-0.343856 -w ibex-sun -t 2018/01:30:11:43:18
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.538574,-0.769221,-0.343856
which is R.A. +304.998 Decl. -20.112
missing R.A. +312.775 Decl. -17.668 (ibex-sun)
error is R.A. +7.777 Decl. +2.444
for a total 7.753 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 +312.851 -d -17.647 -w ibex-sun -t 2018/01:30:13:31:26
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.648090,-0.698626,-0.303152
which is R.A. +312.851 Decl. -17.647
missing R.A. +312.851 Decl. -17.647 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +312.851 -d -17.647 -w ibex-sun -t 2018/01:30:15:01:32
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.648090,-0.698626,-0.303152
which is R.A. +312.851 Decl. -17.647
missing R.A. +312.914 Decl. -17.629 (ibex-sun)
error is R.A. +0.063 Decl. +0.018
for a total 0.063 deg
ibex_rotate -o -r +312.851 -d -17.647 -w ibex-sun -t 2018/02:03:14:41:21
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.648090,-0.698626,-0.303152
which is R.A. +312.851 Decl. -17.647
missing R.A. +316.898 Decl. -16.473 (ibex-sun)
error is R.A. +4.047 Decl. +1.174
for a total 4.043 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 396 apogee:
ibex_rotate -o -u 0.667031,-0.679725,-0.305031 -w ibex-sun -t 2018/02:03:16:53:54
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.667031,-0.679725,-0.305031
which is R.A. +314.460 Decl. -17.760
missing R.A. +316.993 Decl. -16.448 (ibex-sun)
error is R.A. +2.533 Decl. +1.312
for a total 2.754 deg
ibex_rotate -o -u 0.667031,-0.679725,-0.305031 -w ibex-sun -t 2018-02-08T13:21:29.901Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.667031,-0.679725,-0.305031
which is R.A. +314.460 Decl. -17.760
missing R.A. +321.953 Decl. -14.973 (ibex-sun)
error is R.A. +7.493 Decl. +2.787
for a total 7.709 deg
No Lo O-mode.
There is no overlap with orbit 394 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: "Eric Chubin" <Eric.Chubin at OrbitalATK.com>, "Colin Joyce" <cjl46 at wildcats.unh.edu>, "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" <kwfairchild at gmail.com>, "Ken Fairchild" <fair-play at comcast.net>, "Robert Lockwood" <Robert.Lockwood at OrbitalATK.com>, "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: Friday, January 12, 2018 8:55:01 PM
Subject: IBEX Orbit# 395 ATS Approval (26 Jan 18 - 4 Feb 18)
Guys,
Here are the planning files and ATS for Orbit# 395.
Please respond to this email thread with your comments and approvals
Approvals are required before 15 Jan 18 @1400 UTC
Note the following:
1. Apogee Sun Maneuver
2. IBEX_Hi Gain Test
# Orbit# 395 APOGEE: IBEX_Hi Gain Test
#CEU_MODE HVENG $TIME=2018/02:01:14:30:00
#CEU_MODE HVSCI $TIME=2018/02:01:18:45:41
3. No Battery Balancing Commands
We have set the long eclipse flag for Orbits 391,392, 393 and 394
4. Command Load Constraint Violation Report
IBEX_2018_026_o0395a_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 2018/01/26 10:52:49 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2018/01/30 14:31:32 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Sheral R. Wesley
Sr Systems Engineer
IBEX , OCO2 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/or 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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