All,
I have looked at the orbit 436 ATS,
IBEX_2019_032_o0436a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2019_032_o0436a_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_032_o0436a_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_032_o0436a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. The outage starts about 6 1/2 hours after apogee and runs for almost 2 1/2 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_Orbit436_Contacts.txt,
for all contacts (3).
The inertial maneuver at perigee of orbit 435 left us pointing in safe directions for the orbit 436 arc A ascending and descending sequences:
ibex_rotate -o -u 0.686208,-0.663266,-0.298658 -w ibex-sun -t 2019/02:02:01:43:04
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. +315.141 Decl. -17.027 (ibex-sun)
error is R.A. +0.833 Decl. +0.350
for a total 0.869 deg
ibex_rotate -o -u 0.686208,-0.663266,-0.298658 -w ibex-sun -t 2019/02:05:16:29:58
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. +318.835 Decl. -15.934 (ibex-sun)
error is R.A. +2.861 Decl. +1.443
for a total 3.098 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 0.742565,-0.610753,-0.274916 -w ibex-sun -t 2019/02:05:18:13:06
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.742565,-0.610753,-0.274916
which is R.A. +320.563 Decl. -15.957
missing R.A. +318.906 Decl. -15.911 (ibex-sun)
error is R.A. +1.657 Decl. +0.046
for a total 1.594 deg
ibex_rotate -o -u 0.742565,-0.610753,-0.274916 -w ibex-sun -t 2019/02:05:19:48:12
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.742565,-0.610753,-0.274916
which is R.A. +320.563 Decl. -15.957
missing R.A. +318.971 Decl. -15.890 (ibex-sun)
error is R.A. +1.592 Decl. +0.067
for a total 1.532 deg
ibex_rotate -o -u 0.742565,-0.610753,-0.274916 -w ibex-sun -t 2019/02:10:08:30:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.742565,-0.610753,-0.274916
which is R.A. +320.563 Decl. -15.957
missing R.A. +323.395 Decl. -14.470 (ibex-sun)
error is R.A. +2.832 Decl. +1.487
for a total 3.111 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 437 apogee:
ibex_rotate -o -u 0.794949,-0.552484,-0.250633 -w ibex-sun -t 2019/02:10:11:22:34
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.794949,-0.552484,-0.250633
which is R.A. +325.201 Decl. -14.515
missing R.A. +323.517 Decl. -14.436 (ibex-sun)
error is R.A. +1.684 Decl. +0.079
for a total 1.633 deg
ibex_rotate -o -u 0.794949,-0.552484,-0.250633 -w ibex-sun -t 2019-02-15T11:17:07.434Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.794949,-0.552484,-0.250633
which is R.A. +325.201 Decl. -14.515
missing R.A. +328.526 Decl. -12.752 (ibex-sun)
error is R.A. +3.325 Decl. +1.763
for a total 3.680 deg
No Lo O-mode.
There is no overlap with orbit 435 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
On January 18, 2019 at 6:58 PM "Perry, Timothy" <Timothy.Perry@ngc.com> wrote:
All,
Attached are the planning files for Orbit #436.
Please respond to this thread with comments and approvals.
Approvals are required by COB on 22 Jan 2019.
Note the following:
1. Battery Balancing
# Orbit 436 Battery Balancing
# 2019-02-10T19:09:42.049Z,Perigee,orbit:436
@ECT_SetLongEclipseFlag TRUE $TIME=2019/02:10:18:30:00
@ECT_SetLongEclipseFlag FALSE $TIME=2019/02:10:20:00:00
2. IBEX_2019_032_o0436a_v001_.ccvr
# IBEX_2019_032_o0436a_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 2019/02/01 23:53:00 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2019/02/05 19:18:12 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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