All,
I have looked at the orbit 435 ATS,
IBEX_2019_023_o0435a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2019_023_o0435a_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 v004 STF,
IBEX_2019_023_o0435a_v004.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_023_o0435a_v001.oef,
and as verified with ibex_orbit.
There is one star outage. The outage starts 13+ hours before apogee and runs for 3+ days. Some despinning may 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_Orbit435_Contacts_v2.txt,
for all contacts (4).
The inertial maneuver at perigee of orbit 434 left us pointing in safe directions for the orbit 435 arc A ascending and descending sequences:
ibex_rotate -o -u 0.560826,-0.755511,-0.338639 -w ibex-sun -t 2019/01:24:00:02:59
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.560826,-0.755511,-0.338639
which is R.A. +306.587 Decl. -19.794
missing R.A. +305.769 Decl. -19.403 (ibex-sun)
error is R.A. +0.818 Decl. +0.391
for a total 0.864 deg
ibex_rotate -o -u 0.560826,-0.755511,-0.338639 -w ibex-sun -t 2019/01:26:23:51:44
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.560826,-0.755511,-0.338639
which is R.A. +306.587 Decl. -19.794
missing R.A. +308.918 Decl. -18.656 (ibex-sun)
error is R.A. +2.331 Decl. +1.138
for a total 2.477 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 0.62509,-0.712402,-0.318976 -w ibex-sun -t 2019/01:27:01:34:52
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.625090,-0.712402,-0.318976
which is R.A. +311.265 Decl. -18.601
missing R.A. +308.991 Decl. -18.637 (ibex-sun)
error is R.A. +2.274 Decl. +0.036
for a total 2.155 deg
ibex_rotate -o -u 0.62509,-0.712402,-0.318976 -w ibex-sun -t 2019/01:27:03:09:58
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.625090,-0.712402,-0.318976
which is R.A. +311.265 Decl. -18.601
missing R.A. +309.058 Decl. -18.620 (ibex-sun)
error is R.A. +2.207 Decl. +0.019
for a total 2.091 deg
ibex_rotate -o -u 0.62509,-0.712402,-0.318976 -w ibex-sun -t 2019/02:01:03:08:39
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.625090,-0.712402,-0.318976
which is R.A. +311.265 Decl. -18.601
missing R.A. +314.114 Decl. -17.263 (ibex-sun)
error is R.A. +2.849 Decl. +1.338
for a total 3.023 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 436 apogee:
ibex_rotate -o -u 0.686208,-0.663266,-0.298658 -w ibex-sun -t 2019/02:01:05:41:49
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.686208,-0.663266,-0.298658
which is R.A. +315.974 Decl. -17.377
missing R.A. +314.227 Decl. -17.236 (ibex-sun)
error is R.A. +1.747 Decl. +0.141
for a total 1.674 deg
ibex_rotate -o -u 0.686208,-0.663266,-0.298658 -w ibex-sun -t 2019-02-06T04:03:07.239Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.686208,-0.663266,-0.298658
which is R.A. +315.974 Decl. -17.377
missing R.A. +319.310 Decl. -15.782 (ibex-sun)
error is R.A. +3.336 Decl. +1.595
for a total 3.573 deg
No Lo O-mode.
There is no overlap with orbit 434 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
On January 10, 2019 at 8:48 AM "Perry, Timothy" <Timothy.Perry@ngc.com> wrote:
All,
Attached are the planning files for Orbit #435.
Please respond to this thread with comments and approvals.
Approvals are required by COB on 12 Jan 2019.
Note the following:
1. Battery Balancing
# Orbit 435 Moderate Eclipse
# 2019-02-01T14:28:08.299Z,Perigee,orbit:435
@ECT_SetLongEclipseFlag TRUE $TIME=2019/02:01:14:00:00
@ECT_SetLongEclipseFlag FALSE $TIME=2019/02:01:15:30:00
2. Additional Contact for the “Lo Nominal Sweep Table Upload”
USAK01 01/24/19 024 08:00:00 - 09:00:00 gmt
3. IBEX_2019_023_o0435a_v001_.ccvr
# Input files: 1
# IBEX_2019_023_o0435a_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 2019/01/23 22:14:45 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2019/01/27 02:39:58 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
![cid:image002.png@01D43627.CCEBFFF0]()
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Thank you.
*********************