[Isocops] IBEX Orbit# 324 ATS Approval v002 (19 Apr 16 - 28 Apr 16) - v002 approval
Ken Fairchild
fair-play at comcast.net
Mon Apr 11 21:16:31 EDT 2016
All,
Note: Off-pointing at arc B descending is 3.871 deg
Off-pointing at orbit 325 apogee is 4.919 deg
Note: Only difference (other than comments) between the v001 and v002 files is in the start time of the star tracker outage at the end of orbit 323.
I have looked at the orbit 324 recovery ATS,
IBEX_2016_110_o0324a_Recovery_v002.scr ,
and I approve.
The only constraint violations in
IBEX_2016_110_o0324a_Recovery_v002.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 v003 STF,
IBEX_2016_110_o0324a_v003.stf,
except the ATS has an SSR_DUMP_NEW command. 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_110_o0324a_Recovery_v002.oef ,
and as verified with ibex_orbit.
There are 3 star tracker outages. The first starts about 2 hours before 15 Re ascending and ends about 3 hours later. The second starts 3 1/2+ days after the first outage ends and runs for about 3 days. The third starts about 8 1/2 hours before 15 Re descending and ends 9 1/2 hours later. If the star tracker was working some despinning might be required due to the 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_Orbit324_RecoveryContacts.txt,
for all contacts (3).
We are doing battery cell balancing this orbit and the balancing commands are correct and offset by enough time from other commands.
The sun precession maneuver at perigee of orbit 323 left us pointing in safe directions for the orbit 324 arc A ascending and descending sequences:
ibex_rotate -o -r +27.446 -d +11.316 -w ibex-sun -t 2016/04:20:05:17:17
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.870194,+0.451952,+0.196220
which is R.A. +27.446 Decl. +11.316
missing R.A. +28.224 Decl. +11.575 (ibex-sun)
error is R.A. +0.778 Decl. +0.259
for a total 0.806 deg
ibex_rotate -o -r +27.446 -d +11.316 -w ibex-sun -t 2016/04:24:06:45:16
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.870194,+0.451952,+0.196220
which is R.A. +27.446 Decl. +11.316
missing R.A. +32.155 Decl. +12.959 (ibex-sun)
error is R.A. +4.709 Decl. +1.643
for a total 4.888 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 +32.226 -d +12.984 -w ibex-sun -t 2016/04:24:08:33:24
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.824323,+0.519626,+0.224679
which is R.A. +32.226 Decl. +12.984
missing R.A. +32.226 Decl. +12.984 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +32.226 -d +12.984 -w ibex-sun -t 2016/04:24:10:03:30
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.824323,+0.519626,+0.224679
which is R.A. +32.226 Decl. +12.984
missing R.A. +32.285 Decl. +13.005 (ibex-sun)
error is R.A. +0.059 Decl. +0.021
for a total 0.061 deg
ibex_rotate -o -r +32.226 -d +12.984 -w ibex-sun -t 2016/04:28:10:47:10
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.824323,+0.519626,+0.224679
which is R.A. +32.226 Decl. +12.984
missing R.A. +35.971 Decl. +14.303 (ibex-sun)
error is R.A. +3.745 Decl. +1.319
for a total 3.871 deg
The sun precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 325 apogee:
ibex_rotate -o -r +36.066 -d +14.334 -w ibex-sun -t 2016/04:28:13:20:57
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.783175,+0.570389,+0.247574
which is R.A. +36.066 Decl. +14.334
missing R.A. +36.066 Decl. +14.334 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +36.066 -d +14.334 -w ibex-sun -t 2016-05-03T12:09:01.963Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.783175,+0.570389,+0.247574
which is R.A. +36.066 Decl. +14.334
missing R.A. +40.923 Decl. +15.820 (ibex-sun)
error is R.A. +4.857 Decl. +1.486
for a total 4.919 deg
No Lo O-mode.
There is no overlap with orbit 323 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>, "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>
Sent: Monday, April 11, 2016 1:00:22 PM
Subject: IBEX Orbit# 324 ATS Approval v002 (19 Apr 16 - 28 Apr 16)
Guys,
Here are the planning files and ATS for Orbit# 324
Everything have been re-run. I had a BLONDE MOMENT, and all is fine now
Note the following:
1. No Ascending SetSpinPulseProtectEnable Enable commands
2. PERIGEE Battery Balancing Commands
Orbit# 324 PERIGEE: Battery Balancing Commands
# 2016-04-28T22:10:18.040Z,Perigee,orbit:324
SetLongEclipseFlag TRUE $TIME=2016/04:28:23:00:00
SetLongEclipseFlag FALSE $TIME=2016/04:29:00:30:00
3. APL-18 SSR_Dump
IBEX,APL-18,ADD,04/28/16,119,21:30:00,04/28/16,119,22:30:00,,11re-Descending Perigee 2K-320K IBEX Orbit# 324 SSR_Dump/Tracking Contact (11 Desc)
4. Command Load Constraint Violation Report
IBEX_2016_110_o0324a_Recovery_v002.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 2016/04/20 03:27:24 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2016/04/24 09:33:32 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
From: Wesley.Sheral
Sent: Thursday, April 07, 2016 1:32 PM
To: David Heirtzler; IBEX-FDG; IBEXOPS; ISOC; Ken Fairchild; Lockwood.Robert; Michelle Reno; Nigel Angold; Paul Janzen; Perry.Tim; Tyler.Ryan; Wesley.Sheral
Subject: IBEX Orbit# 324 ATS Approval (19 Apr 16 - 28 Apr 16)
Guys,
Here are the planning files and ATS for Orbit# 324.
Please respond to this email thread with your comments and approvals.
Approvals are required before 9 Apr 16 @ 1400 UTC
Note the following:
5. No Ascending SetSpinPulseProtectEnable Enable commands
6. PERIGEE Battery Balancing Commands
Orbit# 324 PERIGEE: Battery Balancing Commands
# 2016-04-28T22:10:18.040Z,Perigee,orbit:324
SetLongEclipseFlag TRUE $TIME=2016/04:28:23:00:00
SetLongEclipseFlag FALSE $TIME=2016/04:29:00:30:00
7. APL-18 SSR_Dump
IBEX,APL-18,ADD,04/28/16,119,21:30:00,04/28/16,119,22:30:00,,11re-Descending Perigee 2K-320K IBEX Orbit# 324 SSR_Dump/Tracking Contact (11 Desc)
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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