[Isocops] IBEX Orbit #442 ATS Approval (29 March - 07 April) - v001 approval
KEN FAIRCHILD
fair-play at comcast.net
Tue Mar 19 19:15:40 EDT 2019
All,
I have looked at the orbit 442 ATS,
IBEX_2019_087_o0442a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2019_087_o0442a_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_087_o0442a_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_087_o0442a_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_Orbit442_Contacts_V002.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 441 left us pointing in safe directions for the orbit 442 arc A ascending and descending sequences:
ibex_rotate -o -u 0.995481,0.090333,0.029282 -w ibex-sun -t 2019/03:29:09:22:58
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.995481,+0.090333,+0.029282
which is R.A. +5.185 Decl .+1.678
missing R.A. +7.469 Decl. +3.203 (ibex-sun)
error is R.A. +2.284 Decl. +1.525
for a total 2.745 deg
ibex_rotate -o -u 0.995481,0.090333,0.029282 -w ibex-sun -t 2019/04:02:01:27:43
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.995481,+0.090333,+0.029282
which is R.A. +5.185 Decl. +1.678
missing R.A. +10.922 Decl. +4.687 (ibex-sun)
error is R.A. +5.737 Decl. +3.009
for a total 6.470 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 0.984935,0.162437,0.059306 -w ibex-sun -t 2019/04:02:03:10:51
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.984935,+0.162437,+0.059306
which is R.A. +9.365 Decl. +3.400
missing R.A. +10.987 Decl. +4.716 (ibex-sun)
error is R.A. +1.622 Decl. +1.316
for a total 2.086 deg
ibex_rotate -o -u 0.984935,0.162437,0.059306 -w ibex-sun -t 2019/04:02:04:45:57
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.984935,+0.162437,+0.059306
which is R.A. +9.365 Decl. +3.400
missing R.A. +11.047 Decl. +4.743 (ibex-sun)
error is R.A. +1.682 Decl. +1.343
for a total 2.149 deg
ibex_rotate -o -u 0.984935,0.162437,0.059306 -w ibex-sun -t 2019/04:06:17:40:25
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.984935,+0.162437,+0.059306
which is R.A. +9.365 Decl. +3.400
missing R.A. +15.059 Decl. +6.446 (ibex-sun)
error is R.A. +5.694 Decl. +3.046
for a total 6.439 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 443 apogee:
ibex_rotate -o -u 0.968203,0.232981,0.091119 -w ibex-sun -t 2019/04:06:21:11:35
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.968203,+0.232981,+0.091119
which is R.A. +13.530 Decl. +5.228
missing R.A. +15.190 Decl. +6.494 (ibex-sun)
error is R.A. +1.660 Decl. +1.266
for a total 2.081 deg
ibex_rotate -o -u 0.968203,0.232981,0.091119 -w ibex-sun -t 2019-04-11T19:19:56.842Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.968203,+0.232981,+0.091119
which is R.A. +13.530 Decl. +5.228
missing R.A. +19.839 Decl. +8.370 (ibex-sun)
error is R.A. +6.309 Decl. +3.142
for a total 7.008 deg
No Lo O-mode.
There is no overlap with orbit 441 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
> On March 14, 2019 at 11:03 AM "Perry, Timothy" <Timothy.Perry at ngc.com> wrote:
>
>
> All,
>
> Attached are the planning files for Orbit #442.
>
> Please respond to this thread with comments and approvals.
>
> Approvals are required by COB 18 March 2019.
>
>
>
> Please note the following:
>
> 1. # Orbit 442 Battery Balancing
>
> # 2019-04-07T03:08:04.931Z,Perigee,orbit:442
>
> @ECT_SetLongEclipseFlag TRUE $TIME=2019/04:07:02:00:00
>
> @ECT_SetLongEclipseFlag FALSE $TIME=2019/04:07:03:30:00
>
>
>
> 2. The second perigee pass for orbit #442 will be in the Orbit 443 ATS. The pass is at 14re ascending orbit 443.
>
> IBEX,USHI01,ADD,04/07/19,097,09:30:00,04/07/19,097,10:30:00,,LAHO 160K IBEX-1 Orbit # 442 SSR_Dump/Tracking Contact
>
>
>
> 3. IBEX_2019_087_o0442a_v001_.ccvr
>
> # IBEX_2019_087_o0442a_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 2019/03/29 06:55:13 UTC
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2019/04/02 04:15:57 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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