[Isocops] IBEX Orbit #613 ATS Approval (02 - 10 July 2023) - v001 approval
Ken Fairchild
kwfairchild at gmail.com
Wed Jun 21 08:57:33 EDT 2023
All,
I have looked at the orbit 613 ATS,
IBEX_2023_182_o0613a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2023_182_o0613a_v001.ccvr
are from the removal of the
ACT_SetSpinPulseProtectEnable Enable
commands (2); the violations are expected.
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_182_o0613a_v001.oef,
and as verified with ibex_orbit.
There are two star tracker outages. The first starts at orbit 612 perigee
and runs for 1- days. The second starts 2+ hours after perigee and runs
for about 4.5 hours. Some despinning may be required due to the first
outage.
The ground station command sequences are correct and the timing and bit
rates match those in the contacts file,
IBEX_Orbit613_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 612 leaves us pointing
in safe directions for the orbit 613 arc A ascending and descending
sequences:
ibex_rotate -o -u -0.122107,0.914177,0.386486 -w ibex-sun -t
2023/07:02:04:01:30
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.122107,+0.914176,+0.386486
which is R.A. +97.608 Decl. +22.736
missing R.A. +100.569 Decl. +23.061 (ibex-sun)
error is R.A. +2.961 Decl. +0.325
for a total 2.747 deg
ibex_rotate -o -u -0.122107,0.914177,0.386486 -w ibex-sun -t
2023/07:05:18:21:54
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.122107,+0.914176,+0.386486
which is R.A. +97.608 Decl. +22.736
missing R.A. +104.225 Decl. +22.802 (ibex-sun)
error is R.A. +6.617 Decl. +0.066
for a total 6.101 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 -0.195323,0.903712,0.38099 -w ibex-sun -t
2023/07:05:20:05:02
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.195323,+0.903712,+0.380990
which is R.A. +102.196 Decl. +22.395
missing R.A. +104.299 Decl. +22.796 (ibex-sun)
error is R.A. +2.103 Decl. +0.401
for a total 1.983 deg
ibex_rotate -o -u -0.195323,0.903712,0.38099 -w ibex-sun -t
2023/07:05:21:40:08
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.195323,+0.903712,+0.380990
which is R.A. +102.196 Decl. +22.395
missing R.A. +104.368 Decl. +22.791 (ibex-sun)
error is R.A. +2.172 Decl. +0.396
for a total 2.044 deg
ibex_rotate -o -u -0.195323,0.903712,0.38099 -w ibex-sun -t
2023/07:10:08:04:12
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.195323,+0.903712,+0.380990
which is R.A. +102.196 Decl. +22.395
missing R.A. +109.027 Decl. +22.300 (ibex-sun)
error is R.A. +6.831 Decl. +0.095
for a total 6.318 deg
The inertial precession maneuver at perigee leaves us pointing in safe
directions at the time of the maneuver and at orbit 614 apogee:
ibex_rotate -o -u -0.270005,0.886965,0.374688 -w ibex-sun -t
2023/07:10:10:41:34
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.270005,+0.886965,+0.374688
which is R.A. +106.931 Decl. +22.005
missing R.A. +109.137 Decl. +22.282 (ibex-sun)
error is R.A. +2.206 Decl. +0.277
for a total 2.062 deg
ibex_rotate -o -u -0.270005,0.886965,0.374688 -w ibex-sun -t
2023-07-15T09:55:17.018Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.270005,+0.886965,+0.374688
which is R.A. +106.931 Decl. +22.005
missing R.A. +114.074 Decl. +21.610 (ibex-sun)
error is R.A. +7.143 Decl. +0.395
for a total 6.643 deg
Lo Normal mode for the entire orbit.
There is no overlap with orbit 612 commands by manual inspection or by
checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
On Mon, Jun 19, 2023 at 12:01 PM Perry, Timothy E [US] (SP) <
Timothy.Perry at ngc.com> wrote:
> All,
>
> Attached are the planning files for Orbit #613. Please respond to this
> thread with comments and approvals. Approvals are required by 1700, 21 June
> 2023
>
>
>
> Please note the following:
>
> 1. Battery Balancing this Orbit.
>
> Begin 2023/07/10 19:00:00 – End 2023/07/10 20:30:00
>
>
>
> 2. Command Load Constraint Violation Report (CCVR)
>
> IBEX_2023_182_o0613a_v001.ccvr
>
> # Input files: 1
>
> # IBEX_2023_182_o0613a_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 2023/07/02 02:08:26 UTC
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2023/07/05 21:10:08 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/20230621/578b1cfd/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev17-o0613_KWF.doc
Type: application/msword
Size: 121344 bytes
Desc: not available
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20230621/578b1cfd/IBEX-Command-Approval-Checklist-Rev17-o0613_KWF-0001.doc>
More information about the Isocops
mailing list