[Isocops] IBEX Orbit #425 ATS Approval (25 Oct - 3 Nov) - v001 approval
Ken Fairchild
fair-play at comcast.net
Sat Oct 13 21:27:11 EDT 2018
All,
I have looked at the orbit 425 ATS,
IBEX_2018_298_o0425a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2018_298_o0425a_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_298_o0425a_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_298_o0425a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. The outage starts in orbit 424 and ends 8 1/2 hours after 15 Re ascending. Some despinning may be required due to this outage.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit425_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 sun precession maneuver at perigee of orbit 424 left us pointing in safe directions for the orbit 425 arc A ascending and descending sequences:
ibex_rotate -o -r +209.234 -d -11.931 -w ibex-sun -t 2018/10:25:22:47:05
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.853781,-0.477827,-0.206734
which is R.A. +209.234 Decl. -11.931
missing R.A. +210.042 Decl. -12.269 (ibex-sun)
error is R.A. +0.808 Decl. +0.338
for a total 0.859 deg
ibex_rotate -o -r +209.234 -d -11.931 -w ibex-sun -t 2018/10:29:11:51:12
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.853781,-0.477827,-0.206734
which is R.A. +209.234 Decl. -11.931
missing R.A. +213.341 Decl. -13.417 (ibex-sun)
error is R.A. +4.107 Decl. +1.486
for a total 4.273 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 -0.831103,-0.506074,-0.230559 -w ibex-sun -t 2018/10:29:13:34:20
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.831103,-0.506074,-0.230559
which is R.A. +211.338 Decl. -13.330
missing R.A. +213.410 Decl. -13.439 (ibex-sun)
error is R.A. +2.072 Decl. +0.109
for a total 2.018 deg
ibex_rotate -o -u -0.831103,-0.506074,-0.230559 -w ibex-sun -t 2018/10:29:15:09:26
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.831103,-0.506074,-0.230559
which is R.A. +211.338 Decl. -13.330
missing R.A. +213.473 Decl. -13.460 (ibex-sun)
error is R.A. +2.135 Decl. +0.130
for a total 2.081 deg
ibex_rotate -o -u -0.831103,-0.506074,-0.230559 -w ibex-sun -t 2018/11:02:23:32:11
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.831103,-0.506074,-0.230559
which is R.A. +211.338 Decl. -13.330
missing R.A. +217.828 Decl. -14.862 (ibex-sun)
error is R.A. +6.490 Decl. +1.532
for a total 6.478 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 426 apogee:
ibex_rotate -o -u -0.785543,-0.564034,-0.254534 -w ibex-sun -t 2018/11:03:02:02:31
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.785543,-0.564034,-0.254534
which is R.A. +215.679 Decl. -14.746
missing R.A. +217.937 Decl. -14.901 (ibex-sun)
error is R.A. +2.258 Decl. +0.155
for a total 2.188 deg
ibex_rotate -o -u -0.785543,-0.564034,-0.254534 -w ibex-sun -t 2018-11-07T21:08:07.567Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.785543,-0.564034,-0.254534
which is R.A. +215.679 Decl. -14.746
missing R.A. +222.585 Decl. -16.356 (ibex-sun)
error is R.A. +6.906 Decl. +1.610
for a total 6.845 deg
No Lo O-mode.
There is no overlap with orbit 424 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
> On October 12, 2018 at 10:10 AM "Perry, Timothy" <Timothy.Perry at OrbitalATK.com> wrote:
>
>
> All,
>
> Attached are the planning files for Orbit #425.
>
> Please respond to this thread with comments and approvals.
>
> Approvals are required by COB 15 Oct 18.
>
>
>
> Note the Following:
>
> 1. No Battery Balancing
>
>
>
> 2. Command Load Constraint Violation Report (CCVR)
>
> # IBEX_2018_298_o0425a_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 2018/10/25 21:01:04 UTC
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2018/10/29 14:39:26 UTC
>
>
>
> ==============
>
> OTHER MESSAGES
>
> ==============
>
> NO MESSAGES.
>
>
>
>
>
>
>
>
>
> Timothy E. Perry
>
> CRS, IBEX, OCO-2 & TESS
>
> Mission Operations
>
> Tim.perry at ngc.com mailto:Tim.perry at ngc.com
>
> Office (703) 406-5976
>
> Cell (301) 606-1430
>
> Corp Cell (571) 447-8977
>
>
>
> [cid:image002.png at 01D43627.CCEBFFF0]
>
>
>
>
>
>
>
> ---------------------------------------------
> 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/20181013/b32dc88a/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev16e-o0425_KWF.doc
Type: application/msword
Size: 118784 bytes
Desc: not available
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20181013/b32dc88a/IBEX-Command-Approval-Checklist-Rev16e-o0425_KWF-0001.doc>
More information about the Isocops
mailing list