All,
I have looked at the orbit 451 ATS,
IBEX_2019_170_o0451a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2019_170_o0451a_v001.ccvr
are from the removal of the
ACT_SetSpinPulseProtectEnable Enable
commands (2); the violations are expected.
The PL commands in the v001 ATS mach those in the v002 STF,
IBEX_2019_170_o0451a_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_170_o0451a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. The outage starts about 5 hours before perigee and runs for 8 hours. No despinning should be required due to this outage.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit451_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 450 left us pointing in safe directions for the orbit 451 arc A ascending and descending sequences:
ibex_rotate -o -u 0.082715,0.917934,0.388014 -w ibex-sun -t 2019/06:19:18:26:33
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.082715,+0.917934,+0.388014
which is R.A. +84.851 Decl. +22.831
missing R.A. +87.712 Decl. +23.397 (ibex-sun)
error is R.A. +2.861 Decl. +0.566
for a total 2.692 deg
ibex_rotate -o -u 0.082715,0.917934,0.388014 -w ibex-sun -t 2019/06:23:07:22:55
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.082715,+0.917934,+0.388014
which is R.A. +84.851 Decl. +22.831
missing R.A. +91.441 Decl. +23.424 (ibex-sun)
error is R.A. +6.590 Decl. +0.593
for a total 6.089 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 0.009441,0.921463,0.388352 -w ibex-sun -t 2019/06:23:09:06:03
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.009441,+0.921463,+0.388352
which is R.A. +89.413 Decl. +22.852
missing R.A. +91.517 Decl. +23.424 (ibex-sun)
error is R.A. +2.104 Decl. +0.572
for a total 2.018 deg
ibex_rotate -o -u 0.009441,0.921463,0.388352 -w ibex-sun -t 2019/06:23:10:41:09
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.009441,+0.921463,+0.388352
which is R.A. +89.413 Decl. +22.852
missing R.A. +91.587 Decl. +23.425 (ibex-sun)
error is R.A. +2.174 Decl. +0.573
for a total 2.080 deg
ibex_rotate -o -u 0.009441,0.921463,0.388352 -w ibex-sun -t 2019/06:27:19:26:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.009441,+0.921463,+0.388352
which is R.A. +89.413 Decl. +22.852
missing R.A. +96.131 Decl. +23.340 (ibex-sun)
error is R.A. +6.718 Decl. +0.488
for a total 6.198 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 452 apogee:
ibex_rotate -o -u -0.066571,0.919042,0.388497 -w ibex-sun -t 2019/06:27:22:05:06
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.066571,+0.919042,+0.388497
which is R.A. +94.143 Decl. +22.861
missing R.A. +96.238 Decl. +23.331 (ibex-sun)
error is R.A. +2.095 Decl. +0.470
for a total 1.984 deg
ibex_rotate -o -u -0.066571,0.919042,0.388497 -w ibex-sun -t 2019-07-02T20:43:17.934Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.066571,+0.919042,+0.388497
which is R.A. +94.143 Decl. +22.861
missing R.A. +101.344 Decl. +23.029 (ibex-sun)
error is R.A. +7.201 Decl. +0.168
for a total 6.633 deg
No Lo O-mode.
There is no overlap with orbit 450 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
On June 5, 2019 at 3:47 PM "Perry, Timothy" <Timothy.Perry@ngc.com> wrote:
All,
Attached are the planning files for Orbit #451
Please respond to this thread with comments and approvals.
Approvals are required by COB 09 June 2019.
Please note the following:
1. Battery Balancing
# Orbit 451 Battery Balancing
# 2019-06-28T06:43:21.527Z,Perigee,orbit:451
@ECT_SetLongEclipseFlag TRUE $TIME=2019/06:28:06:00:00
@ECT_SetLongEclipseFlag FALSE $TIME=2019/06:28:07:30:00
2. IBEX_2019_170_o0451a_v001.ccvr
# Input files: 1
# IBEX_2019_170_o0451a_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 2019/06/19 16:36:27 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2019/06/23 10:11:09 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Timothy E.Perry
CRS IBEX OCO-2
Mission Operations
tim.perry@orbitalatk.com
Office (703) 406-5976
Cell (301) 606-1430
![cid:image001.jpg@01D04F4E.6B1BECE0]()
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*********************