[Isocops] IBEX Orbit #632 ATS Approval ( Dec 20 - 30, 2023) - v001 approval
Ken Fairchild
kwfairchild at gmail.com
Sun Dec 10 01:17:56 EST 2023
All,
I have looked at the orbit 632 ATS,
IBEX_2023_354_o0632a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2023_354_o0632a_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_2023_354_o0632a_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_2023_354_o0632a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. The outage starts 10 hours after apogee
and runs for 2.5+ days. 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_Orbit632_Contacts.txt,
for all contacts (4).
We are doing battery cell balancing and the balancing commands are correct
and offset by enough time from other commands.
The inertial precession maneuver at perigee of orbit 631 leaves us pointing
in safe directions for the orbit 632 arc A ascending and descending
sequences:
ibex_rotate -o -u -0.01682,-0.913355,-0.406816 -w ibex-sun -t
2023/12:20:20:27:34
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.016820,-0.913355,-0.406816
which is R.A. +268.945 Decl. -24.005
missing R.A. +268.241 Decl. -23.446 (ibex-sun)
error is R.A. +0.704 Decl. +0.559
for a total 0.853 deg
ibex_rotate -o -u -0.01682,-0.913355,-0.406816 -w ibex-sun -t
2023/12:24:12:45:07
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.016820,-0.913355,-0.406816
which is R.A. +268.945 Decl. -24.005
missing R.A. +272.362 Decl. -23.404 (ibex-sun)
error is R.A. +3.417 Decl. +0.601
for a total 3.185 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 0.065365,-0.911893,-0.405189 -w ibex-sun -t
2023/12:24:14:28:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.065365,-0.911893,-0.405189
which is R.A. +274.100 Decl. -23.903
missing R.A. +272.440 Decl. -23.402 (ibex-sun)
error is R.A. +1.660 Decl. +0.501
for a total 1.601 deg
ibex_rotate -o -u 0.065365,-0.911893,-0.405189 -w ibex-sun -t
2023/12:24:16:03:21
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.065365,-0.911893,-0.405189
which is R.A. +274.100 Decl. -23.903
missing R.A. +272.512 Decl. -23.400 (ibex-sun)
error is R.A. +1.588 Decl. +0.503
for a total 1.539 deg
ibex_rotate -o -u 0.065365,-0.911893,-0.405189 -w ibex-sun -t
2023/12:29:04:36:31
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.065365,-0.911893,-0.405189
which is R.A. +274.100 Decl. -23.903
missing R.A. +277.420 Decl. -23.244 (ibex-sun)
error is R.A. +3.320 Decl. +0.659
for a total 3.114 deg
The inertial precession maneuver at perigee leaves us pointing in safe
directions at the time of the maneuver and at orbit 633 apogee:
ibex_rotate -o -u 0.148078,-0.903368,-0.402491 -w ibex-sun -t
2023/12:29:06:57:49
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.148078,-0.903368,-0.402491
which is R.A. +279.309 Decl. -23.734
missing R.A. +277.531 Decl. -23.242 (ibex-sun)
error is R.A. +1.778 Decl. +0.492
for a total 1.704 deg
ibex_rotate -o -u 0.148078,-0.903368,-0.402491 -w ibex-sun -t
2024-01-03T05:32:48.665Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.148078,-0.903368,-0.402491
which is R.A. +279.309 Decl. -23.734
missing R.A. +283.101 Decl. -22.870 (ibex-sun)
error is R.A. +3.792 Decl. +0.864
for a total 3.589 deg
Lo Normal mode for the entire orbit.
There is no overlap with orbit 631 commands by manual inspection or by
checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
On Thu, Dec 7, 2023 at 10:38 AM Perry, Timothy E [US] (SP) <
Timothy.Perry at ngc.com> wrote:
> All,
>
> Attached are the planning files for Orbit #632. Please respond to this
> thread with comments and approvals. Approvals are required by COB 10 Dec
> 2023
>
>
>
> Please note the following:
>
>
>
> 1. Battery Balancing
>
> Eclipse Flag True: 2023/12/29 16:00:00
>
> Eclipse Flag False: 2023/12/29 17:30:00
>
>
>
> 2. Command Load Constraint Violation Report (CCVR)
>
> IBEX_2023_354_o0632a_v001.ccvr
>
> # Input files: 1
>
> # IBEX_2023_354_o0632a_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 2023/12/20 18:50:28 UTC
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2023/12/24 15:33:21 UTC
>
>
>
> ==============
>
> OTHER MESSAGES
>
> ==============
>
> NO MESSAGES.
>
>
>
>
>
> Timothy E.Perry
>
> CRS IBEX OCO-2
>
> Mission Operations
>
> timothy.perry at ngc.com
>
> Office (703) 406-5976
>
> Cell (301) 606-1430
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20231209/fe848d3c/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev17-o0632_KWF.doc
Type: application/msword
Size: 121344 bytes
Desc: not available
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20231209/fe848d3c/IBEX-Command-Approval-Checklist-Rev17-o0632_KWF-0001.doc>
More information about the Isocops
mailing list