All,
I have looked at the orbit 447 ATS,
IBEX_2019_133_o0447a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2019_133_o0447a_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_133_o0447a_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_133_o0447a_v001.oef,
and as verified with ibex_orbit.
There are two star tracker outages. The first starts two days after apogee and runs for a day. The second starts 8 hours before perigee and runs for 4+ hours. Some despinning may be required due to the first outage.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit447_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 446 left us pointing in safe directions for the orbit 447 arc A ascending and descending sequences:
ibex_rotate -o -u 0.637243,0.710643,0.298175 -w ibex-sun -t 2019/05:14:09:18:37
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. +50.628 Decl. +18.506 (ibex-sun)
error is R.A. +2.511 Decl. +1.158
for a total 2.655 deg
ibex_rotate -o -u 0.637243,0.710643,0.298175 -w ibex-sun -t 2019/05:18:00:52:10
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. +54.338 Decl. +19.394 (ibex-sun)
error is R.A. +6.221 Decl. +2.046
for a total 6.248 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 0.577243,0.753202,0.315401 -w ibex-sun -t 2019/05:18:02:35:18
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.577243,+0.753202,+0.315401
which is R.A. +52.534 Decl. +18.385
missing R.A. +54.410 Decl. +19.412 (ibex-sun)
error is R.A. +1.876 Decl. +1.027
for a total 2.051 deg
ibex_rotate -o -u 0.577243,0.753202,0.315401 -w ibex-sun -t 2019/05:18:04:10:24
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.577243,+0.753202,+0.315401
which is R.A. +52.534 Decl. +18.385
missing R.A. +54.477 Decl. +19.428 (ibex-sun)
error is R.A. +1.943 Decl. +1.043
for a total 2.113 deg
ibex_rotate -o -u 0.577243,0.753202,0.315401 -w ibex-sun -t 2019/05:22:13:42:52
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.577243,+0.753202,+0.315401
which is R.A. +52.534 Decl. +18.385
missing R.A. +58.794 Decl. +20.366 (ibex-sun)
error is R.A. +6.260 Decl. +1.981
for a total 6.228 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 448 apogee:
ibex_rotate -o -u 0.512818,0.791241,0.333099 -w ibex-sun -t 2019/05:22:16:30:56
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.512818,+0.791241,+0.333099
which is R.A. +57.052 Decl. +19.457
missing R.A. +58.904 Decl. +20.383 (ibex-sun)
error is R.A. +1.852 Decl. +0.926
for a total 1.972 deg
ibex_rotate -o -u 0.512818,0.791241,0.333099 -w ibex-sun -t 2019-05-27T13:11:24.074Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.512818,+0.791241,+0.333099
which is R.A. +57.052 Decl. +19.457
missing R.A. +63.882 Decl. +21.267 (ibex-sun)
error is R.A. +6.830 Decl. +1.810
for a total 6.654 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 29, 2019 at 11:42 AM "Perry, Timothy" <Timothy.Perry@ngc.com> wrote:
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All,
Attached are the planning files for Orbit #447.
Please respond to this thread with comments and approvals.
Approvals are required by COB 03 May 2019.
Please note the following:
- # Orbit 447 Battery Balancing
# 2019-05-23T00:37:38.288Z,Perigee,orbit:447
@ECT_SetLongEclipseFlag TRUE $TIME=2019/05:23:00:00:01
@ECT_SetLongEclipseFlag FALSE $TIME=2019/05:23:01:30:00
- Command Load Constraint Violation Report (CCVR)
# Filename: IBEX_2019_133_o0447a_v001.ccvr
# File type: Command Load Constraint Violation Report (CCVR)
#
# Create time: 2019/119.134456
# Plan period start: 2019/134.065800
# Plan period stop: 2019/143.092630
# Default time format: UTC
#
# Input files: 1
# IBEX_2019_133_o0447a_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 2019/05/14 06:59:43 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2019/05/18 03:40:24 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Timothy E. Perry
Mission Operations
CRS, IBEX, OCO-2 & TESS
timothy.perry@ngc.com
Office (703) 406-5976
Cell (301) 606-1430
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*********************