[Isocops] IBEX Orbit #445 ATS Approval ( 26 April - 5 May 2019) - v001 approval
KEN FAIRCHILD
fair-play at comcast.net
Wed Apr 17 22:47:55 EDT 2019
All,
I have looked at the orbit 445 ATS,
IBEX_2019_115_o0445a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2019_115_o0445a_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_115_o0445a_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_115_o0445a_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_Orbit445_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 inertial maneuver at perigee of orbit 444 left us pointing in safe directions for the orbit 445 arc A ascending and descending sequences:
ibex_rotate -o -u 0.842741,0.497443,0.20576 -w ibex-sun -t 2019/04:25:23:59:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.842741,+0.497443,+0.205760
which is R.A. +30.552 Decl. +11.874
missing R.A. +32.918 Decl. +13.234 (ibex-sun)
error is R.A. +2.366 Decl. +1.360
for a total 2.680 deg
ibex_rotate -o -u 0.842741,0.497443,0.20576 -w ibex-sun -t 2019/04:29:15:30:09
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.842741,+0.497443,+0.205760
which is R.A. +30.552 Decl. +11.874
missing R.A. +36.484 Decl. +14.445 (ibex-sun)
error is R.A. +5.932 Decl. +2.571
for a total 6.322 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 0.7991,0.555575,0.229727 -w ibex-sun -t 2019/04:29:17:13:17
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.799100,+0.555575,+0.229727
which is R.A. +34.809 Decl. +13.281
missing R.A. +36.553 Decl. +14.468 (ibex-sun)
error is R.A. +1.744 Decl. +1.187
for a total 2.068 deg
ibex_rotate -o -u 0.7991,0.555575,0.229727 -w ibex-sun -t 2019/04:29:18:48:23
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.799100,+0.555575,+0.229727
which is R.A. +34.809 Decl. +13.281
missing R.A. +36.616 Decl. +14.490 (ibex-sun)
error is R.A. +1.807 Decl. +1.209
for a total 2.131 deg
ibex_rotate -o -u 0.7991,0.555575,0.229727 -w ibex-sun -t 2019/05:04:06:00:27
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.799100,+0.555575,+0.229727
which is R.A. +34.809 Decl. +13.281
missing R.A. +40.780 Decl. +15.830 (ibex-sun)
error is R.A. +5.971 Decl. +2.549
for a total 6.316 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 446 apogee:
ibex_rotate -o -u 0.749898,0.610535,0.254754 -w ibex-sun -t 2019/05:04:09:11:44
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. +40.901 Decl. +15.861 (ibex-sun)
error is R.A. +1.750 Decl. +1.102
for a total 2.016 deg
ibex_rotate -o -u 0.749898,0.610535,0.254754 -w ibex-sun -t 2019-05-09T07:51:03.109Z
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. +45.793 Decl. +17.262 (ibex-sun)
error is R.A. +6.642 Decl. +2.503
for a total 6.856 deg
No Lo O-mode.
There is no overlap with orbit 444 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
> On April 12, 2019 at 2:47 PM "Perry, Timothy" <Timothy.Perry at ngc.com> wrote:
>
> All,
>
> Attached are the planning files for Orbit #445.
>
> Please respond to this thread with comments and approvals.
>
> Approvals are required by COB 18 April 2019.
>
> This ATS will be uplinked during the Orbit #444 Apogee pass on 20 April @17:00z.
>
> The Orbit #444 Hi gain Cal ATS will be uplinked during the Orbit #443 Perigee passes.
>
>
>
> Please Note the Following:
>
> 1. Battery Balancing
>
> # Orbit 445 Battery Balancing
>
> # 2019-05-04T16:06:50.212Z,Perigee,orbit:445
>
> @ECT_SetLongEclipseFlag TRUE $TIME=2019/05:04:15:30:00
>
> @ECT_SetLongEclipseFlag FALSE $TIME=2019/05:04:17:00:00
>
>
>
> 2. IBEX_2019_115_o0445a_v001.ccvr
>
> # Input files: 1
>
> # IBEX_2019_115_o0445a_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 2019/04/25 21:38:09 UTC
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2019/04/29 18:18:23 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
>
>
>
>
>
>
>
> ---------------------------------------------
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> *********************
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