All,
Note: Angle at orbit 466 arc B descending after the apogee sun precession maneuver: 4.289 deg
I have looked at the orbit 466 ATS,
IBEX_2019_305_o0466a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2019_305_o0466a_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_305_o0466a_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_305_o0466a_v001.oef,
and as verified with ibex_orbit.
There are two star tracker outages. The first starts about 10 hours before apogee and ends just after apogee. The second starts about 1.5 days after apogee and runs for about 5 1/2 hours. Some despinning may be required due to these outages.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit466_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 precession maneuver at perigee of orbit 465 left us pointing in safe directions for the orbit 466 arc A ascending and descending sequences:
ibex_rotate -o -u -0.811712,-0.532222,-0.24055 -w ibex-sun -t 2019/11:01:15:06:26
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.811712,-0.532222,-0.240550
which is R.A. +213.252 Decl. -13.919
missing R.A. +216.269 Decl. -14.405 (ibex-sun)
error is R.A. +3.017 Decl. +0.486
for a total 2.966 deg
ibex_rotate -o -u -0.811712,-0.532222,-0.24055 -w ibex-sun -t 2019/11:05:16:55:37
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.811712,-0.532222,-0.240550
which is R.A. +213.252 Decl. -13.919
missing R.A. +220.170 Decl. -15.619 (ibex-sun)
error is R.A. +6.918 Decl. +1.700
for a total 6.902 deg
The sun 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 -r +220.244 -d -15.641 -w ibex-sun -t 2019/11:05:18:43:45
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.735035,-0.622121,-0.269609
which is R.A. +220.244 Decl. -15.641
missing R.A. +220.244 Decl. -15.641 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +220.244 -d -15.641 -w ibex-sun -t 2019/11:05:20:13:51
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.735035,-0.622121,-0.269609
which is R.A. +220.244 Decl. -15.641
missing R.A. +220.306 Decl. -15.658 (ibex-sun)
error is R.A. +0.062 Decl. +0.017
for a total 0.062 deg
ibex_rotate -o -r +220.244 -d -15.641 -w ibex-sun -t 2019/11:09:22:56:12
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.735035,-0.622121,-0.269609
which is R.A. +220.244 Decl. -15.641
missing R.A. +224.519 Decl. -16.888 (ibex-sun)
error is R.A. +4.275 Decl. +1.247
for a total 4.289 deg
The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 467 apogee:
ibex_rotate -o -u -0.70876,-0.643612,-0.288831 -w ibex-sun -t 2019/11:10:02:34:51
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.708760,-0.643612,-0.288831
which is R.A. +222.242 Decl. -16.788
missing R.A. +224.679 Decl. -16.941 (ibex-sun)
error is R.A. +2.437 Decl. +0.153
for a total 2.337 deg
ibex_rotate -o -u -0.70876,-0.643612,-0.288831 -w ibex-sun -t 2019-11-15T00:09:08.062Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.708760,-0.643612,-0.288831
which is R.A. +222.242 Decl. -16.788
missing R.A. +229.552 Decl. -18.252 (ibex-sun)
error is R.A. +7.310 Decl. +1.464
for a total 7.122 deg
No Lo O-mode.
There is no overlap with orbit 465 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
On October 17, 2019 at 9:12 PM "Perry, Timothy E [US] (IS)" <Timothy.Perry@ngc.com> wrote:
All,
Attached are the planning files for Orbit #466
Please respond to this thread with comments and approvals.
Approvals are required by COB on 21 Oct 2019
Please note the following:
1. Battery Balancing
2. 1 Sun Maneuver ( Apogee) and 1 Inertial maneuver (Perigee)
3. Command Load Constraint Violation Report (CCVR)
# IBEX_2019_305_o0466a_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 2019/11/01 12:34:04 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2019/11/05 19:43:51 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Timothy E.Perry
CRS IBEX OCO-2
Mission Operations
timothy.perry@ngc.com
Office (703) 406-5976
Cell (301) 606-1430