[Isocops] IBEX Orbit #446 ATS Approval ( 5 - 14 May 2019) - v001 approval
KEN FAIRCHILD
fair-play at comcast.net
Wed Apr 24 08:37:53 EDT 2019
All,
I have looked at the orbit 446 ATS,
IBEX_2019_124_o0446a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2019_124_o0446a_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_124_o0446a_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_124_o0446a_v001.oef,
and as verified with ibex_orbit.
There are no star tracker outages.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit446_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 inertial maneuver at perigee of orbit 445 left us pointing in safe directions for the orbit 446 arc A ascending and descending sequences:
ibex_rotate -o -u 0.749898,0.610535,0.254754 -w ibex-sun -t 2019/05:05:02:09:47
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.749898,+0.610535,+0.254754
which is R.A. +39.151 Decl. +14.759
missing R.A. +41.575 Decl. +16.028 (ibex-sun)
error is R.A. +2.424 Decl. +1.269
for a total 2.659 deg
ibex_rotate -o -u 0.749898,0.610535,0.254754 -w ibex-sun -t 2019/05:08:20:17:54
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.749898,+0.610535,+0.254754
which is R.A. +39.151 Decl. +14.759
missingR.A. +45.320 Decl. +17.123 (ibex-sun)
error is R.A. +6.169 Decl. +2.364
for a total 6.385 deg
The inertial 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 0.696203,0.662614,0.276124 -w ibex-sun -t 2019/05:08:22:01:02
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.696203,+0.662614,+0.276124
which is R.A. +43.584 Decl. +16.029
missing R.A. +45.391 Decl. +17.143 (ibex-sun)
error is R.A. +1.807 Decl. +1.114
for a total 2.059 deg
ibex_rotate -o -u 0.696203,0.662614,0.276124 -w ibex-sun -t 2019/05:08:23:36:08
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.696203,+0.662614,+0.276124
which is R.A. +43.584 Decl. +16.029
missing R.A. +45.456 Decl. +17.163 (ibex-sun)
error is R.A. +1.872 Decl. +1.134
for a total 2.122 deg
ibex_rotate -o -u 0.696203,0.662614,0.276124 -w ibex-sun -t 2019/05:13:12:45:35
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.696203,+0.662614,+0.276124
which is R.A. +43.584 Decl. +16.029
missing R.A. +49.808 Decl. +18.343 (ibex-sun)
error is R.A. +6.224 Decl. +2.314
for a total 6.379 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 447 apogee:
ibex_rotate -o -u 0.637243,0.710643,0.298175 -w ibex-sun -t 2019/05:13:15:48:38
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.637243,+0.710643,+0.298175
which is R.A. +48.117 Decl. +17.348
missing R.A. +49.925 Decl. +18.367 (ibex-sun)
error is R.A. +1.808 Decl. +1.019
for a total 2.000 deg
ibex_rotate -o -u 0.637243,0.710643,0.298175 -w ibex-sun -t 2019-05-18T12:24:05.501Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.637243,+0.710643,+0.298175
which is R.A. +48.117 Decl. +17.348
missing R.A. +54.821 Decl. +19.510 (ibex-sun)
error is R.A. +6.704 Decl. +2.162
for a total 6.717 deg
No Lo O-mode.
There is no overlap with orbit 446 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
On April 22, 2019 at 2:48 PM "Perry, Timothy" <Timothy.Perry at ngc.com> wrote:
>
> All,
>
> Attached are the planning files for Orbit #446.
>
> Please respond to this thread with comments and approvals.
>
> Approvals are required by COB 24 April 2019.
>
>
> Please note the following:
>
> 1. No Battery Balancing
>
> 2. IBEX_2019_124_o0446a_v001.ccvr
>
> # Input files: 1
>
> # IBEX_2019_124_o0446a_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 2019/05/04 23:44:50 UTC
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2019/05/08 23:06:08 UTC
>
>
>
> ==============
>
> OTHER MESSAGES
>
> ==============
>
> NO MESSAGES.
>
>
>
> Timothy E.Perry
>
> CRS IBEX OCO-2
>
> Mission Operations
>
> tim.perry at orbitalatk.com
>
> Office (703) 406-5976
>
> Cell (301) 606-1430
>
> [cid:image001.jpg at 01D04F4E.6B1BECE0]
>
>
>
>
>
>
>
> ---------------------------------------------
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> *********************
>
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