[Isocops] IBEX Orbit# 441 ATS Approval (19 - 28 March 2019) - v001 approval
KEN FAIRCHILD
fair-play at comcast.net
Thu Mar 7 22:45:45 EST 2019
All,
Note: Angle at orbit 441 arc B descending after the apogee sun precession maneuver: 3.964 deg
I have looked at the orbit 441 ATS,
IBEX_2019_078_o0441a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2019_078_o0441a_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_2019_078_o0441a_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_2019_078_o0441a_v001.oef,
and as verified with ibex_orbit.
There are two star tracker outages. The first starts before 15 Re descending in orbit 440 and runs for about 2 days. The second starts 2+ days before apogee and runs for 3+ days. Some despinning may be required due to these outages.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit441_Contacts.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 440 left us pointing in safe directions for the orbit 441 arc A ascending and descending sequences:
ibex_rotate -o -r +358.510 -d -0.632 -w ibex-sun -t 2019/03:20:06:08:09
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.999601,-0.026001,-0.011030
which is R.A. +358.510 Decl. -0.632
missing R.A. +359.158 Decl. -0.387 (ibex-sun)
error is R.A. +0.648 Decl. +0.245
for a total 0.693 deg
ibex_rotate -o -r +358.510 -d -0.632 -w ibex-sun -t 2019/03:24:08:21:51
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.999601,-0.026001,-0.011030
which is R.A. +358.510 Decl. -0.632
missing R.A. +2.986 Decl. +1.294 (ibex-sun)
error is R.A. +355.524 Decl. +1.926
for a total 4.872 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 +3.053 -d +1.325 -w ibex-sun -t 2019/03:24:10:09:59
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.998314,+0.053245,+0.023124
which is R.A. +3.053 Decl. +1.325
missing R.A. +3.053 Decl. +1.325 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.001 deg
ibex_rotate -o -r +3.053 -d +1.325 -w ibex-sun -t 2019/03:24:11:40:05
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.998314,+0.053245,+0.023124
which is R.A. +3.053 Decl. +1.325
missing R.A. +3.110 Decl. +1.350 (ibex-sun)
error is R.A. +0.057 Decl. +0.025
for a total 0.062 deg
ibex_rotate -o -r +3.053 -d +1.325 -w ibex-sun -t 2019/03:28:13:24:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.998314,+0.053245,+0.023124
which is R.A. +3.053 Decl. +1.325
missing R.A. +6.688 Decl. +2.912 (ibex-sun)
error is R.A. +3.635 Decl. +1.587
for a total 3.964 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 442 apogee:
ibex_rotate -o -u 0.995481,0.090333,0.029282 -w ibex-sun -t 2019/03:28:16:37:26
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.995481,+0.090333,+0.029282
which is R.A. +5.185 Decl. +1.678
missing R.A. +6.808 Decl. +2.957 (ibex-sun)
error is R.A. +1.623 Decl. +1.279
for a total 2.065 deg
ibex_rotate -o -u 0.995481,0.090333,0.029282 -w ibex-sun -t 2019-04-02T12:58:30.243Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.995481,+0.090333,+0.029282
which is R.A. +5.185 Decl. +1.678
missing R.A.+11.357 Decl. +4.880 (ibex-sun)
error is R.A. +6.172 Decl. +3.202
for a total 6.943 deg
No Lo O-Mode.
There is no overlap with orbit 440 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
> On March 6, 2019 at 11:08 AM "Perry, Timothy" <Timothy.Perry at ngc.com> wrote:
>
>
> All,
>
> Attached are the planning files for Orbit #441.
>
> Please respond to this thread with comments and approvals.
>
> Approvals are required by COB 09 March 2019.
>
>
>
> Please Note the following:
>
> 1. # Orbit 441 Battery Balancing
>
> # 2019-03-28T23:25:33.907Z,Perigee,orbit:441
>
> @ECT_SetLongEclipseFlag TRUE $TIME=2019/03:28:23:00:00
>
> @ECT_SetLongEclipseFlag FALSE $TIME=2019/03:29:00:30:00
>
>
>
> 2. Apogee Sun Maneuver @ 2019/03:24:09:54:59
>
>
>
> 3. The APL pass was replaced with a USAK01 contact
>
> IBEX,APL,CANCELED,03/28/19,087,21:30:00,03/28/19,87,22:30:00,,LAHO 2-320K IBEX-1 Orbit # 441 SSR_Dump/Tracking Contact
>
> IBEX,USAK01,ADD,03/28/19,087,21:30:00,03/28/19,087,22:30:00,,LAHO 160K IBEX-1 Orbit # 441 SSR_Dump/Tracking Contact
>
>
>
> 4. The Second perigee Pass is at 15 re asc and will double as the Hi Background Test End pass. This will be in the Orbit # 442 ATS
>
> IBEX,USHI01,ADD,03/29/19,088,10:00:00,03/29/19,088,11:00:00,,LAHO 64K IBEX-1 Orbit # 442 Hi background Test End/Tracking Contact 15 re
>
>
>
> 5. IBEX_2019_078_o0441a_v001_.ccvr
>
> # Input files: 1
>
> # IBEX_2019_078_o0441a_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 2019/03/20 03:35:09 UTC
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2019/03/24 11:10:05 UTC
>
>
>
> ==============
>
> OTHER MESSAGES
>
> ==============
>
> NO MESSAGES.
>
>
>
> Timothy E. Perry
>
> Mission Operations
>
> CRS, IBEX, OCO-2 & TESS
>
> RAPTOR Test Team
>
> timothy.perry at ngc.com mailto:timothy.perry at ngc.com
>
> Office (703) 406-5976
>
> Cell (301) 606-1430
>
>
>
>
>
>
>
> ---------------------------------------------
> 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.
> *********************
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20190307/c2b2e518/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.gif
Type: image/gif
Size: 530 bytes
Desc: not available
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20190307/c2b2e518/image001-0001.gif>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.png
Type: image/png
Size: 6784 bytes
Desc: not available
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20190307/c2b2e518/image002-0001.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev16e-o0441_KWF.doc
Type: application/msword
Size: 119296 bytes
Desc: not available
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20190307/c2b2e518/IBEX-Command-Approval-Checklist-Rev16e-o0441_KWF-0001.doc>
More information about the Isocops
mailing list