All,
I have looked at the orbit 416 ATS,
IBEX_2018_217_o0416a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2018_217_o0416a_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_2018_217_o0416a_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_2018_217_o0416a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. The outage starts just before perigee and runs for 7 hours. No despinning should be required due to this outage.
There is one moon in Lo FOV session in arc A. The ATS start time is the same as that in the OEF and the ATS end time is 2+ hours after that in the OEF. Differences in timing are not unusual.
Th ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit416_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 415 left us pointing in safe directions for the orbit 416 arc A ascending and descending sequences:
ibex_rotate -o -u -0.646303,0.703736,0.295041 -w ibex-sun -t 2018/08:05:17:45:09
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.646303,+0.703736,+0.295041
which is R.A. +132.564 Decl. +17.160
missing R.A. +135.440 Decl. +16.895 (ibex-sun)
error is R.A. +2.876 Decl. +0.265
for a total 2.763 deg
ibex_rotate -o -u -0.646303,0.703736,0.295041 -w ibex-sun -t 2018/08:09:10:44:57
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.646303,+0.703736,+0.295041
which is R.A. +132.564 Decl. +17.160
missing R.A. +138.950 Decl. +15.876 (ibex-sun)
error is R.A. +6.386 Decl. +1.284
for a total 6.256 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 -0.702814,0.656693,0.273506 -w ibex-sun -t 2018/08:09:12:28:05
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.702814,+0.656693,+0.273506
which is R.A. +136.943 Decl. +15.873
missing R.A. +139.020 Decl. +15.856 (ibex-sun)
error is R.A. +2.077 Decl. +0.017
for a total 1.998 deg
ibex_rotate -o -u -0.702814,0.656693,0.273506 -w ibex-sun -t 2018/08:09:14:03:11
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.702814,+0.656693,+0.273506
which is R.A. +136.943 Decl. +15.873
missing R.A. +139.084 Decl. +15.837 (ibex-sun)
error is R.A. +2.141 Decl. +0.036
for a total 2.060 deg
ibex_rotate -o -u -0.702814,0.656693,0.273506 -w ibex-sun -t 2018/08:14:03:26:12
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.702814,+0.656693,+0.273506
which is R.A. +136.943 Decl. +15.873
missing R.A. +143.488 Decl. +14.488 (ibex-sun)
error is R.A. +6.545 Decl. +1.385
for a total 6.466 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 417 apogee:
ibex_rotate -o -u -0.757047,0.603046,0.251427 -w ibex-sun -t 2018/08:14:06:01:41
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.757047,+0.603046,+0.251427
which is R.A. +141.460 Decl. +14.562
missing R.A. +143.587 Decl. +14.452 (ibex-sun)
error is R.A. +2.127 Decl. +0.110
for a total 2.062 deg
ibex_rotate -o -u -0.757047,0.603046,0.251427 -w ibex-sun -t 2018-08-19T04:18:02.048Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.757047,+0.603046,+0.251427
which is R.A. +141.460 Decl. +14.562
missing R.A. +148.092 Decl. +12.899 (ibex-sun)
error is R.A. +6.632 Decl. +1.663
for a total 6.653 deg
No Lo O-mode.
There is no overlap with orbit 415 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
On July 24, 2018 at 10:05 AM "Perry, Timothy" <Timothy.Perry@OrbitalATK.com> wrote:
All,
Attached are the planning files for Orbit#416.
Please respond to this thread with comments and approvals.
Approvals are required before 25 July 18 @22:00 GMT
Note the following:
1. No battery balancing
2. Moon in Lo FOV
2018-08-05T19:27:00.764Z,MoonInLoFovStart,orbit:416
2018-08-05T20:50:30.826Z,MoonInLoFovStop,orbit:416
3. Command Load Constraint Violation Report
# Input files: 1
# IBEX_2018_217_o0416a_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 2018/08/05 15:58:40 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2018/08/09 13:33:11 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Timothy E. Perry
CRS, IBEX, OCO-2 & TESS
Mission Operations
Tim.perry@ngc.com
Office (703) 406-5976
Cell (301) 606-1430
Corp Cell (571) 447-8977
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Thank you.
*********************