All,
I have looked at the orbit 400 ATS,
IBEX_2018_070_o0400a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2018_070_o0400a_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_2018_070_o0400a_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_2018_070_o0400a_v001.oef,
and as verified with ibex_orbit.
There are no star tracker outages.
There are no moon in Lo FOV sessions.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit400_Contacts.txt,
for all contacts (4).
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 399 left us pointing in safe directions for the orbit 400 arc A ascending and descending sequences:
ibex_rotate -o -u 0.990308,-0.123016,-0.06448 -w ibex-sun -t 2018/03:12:06:52:45
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.990308,-0.123016,-0.064480
which is R.A. +352.919 Decl. -3.697
missing R.A. +352.113 Decl. -3.430 (ibex-sun)
error is R.A. +0.806 Decl. +0.267
for a total 0.848 deg
ibex_rotate -o -u 0.990308,-0.123016,-0.06448 -w ibex-sun -t 2018/03:15:17:40:32
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.990308,-0.123016,-0.064480
which is R.A. +352.919 Decl. -3.697
missing R.A. +355.362 Decl. -2.029 (ibex-sun)
error is R.A. +2.443 Decl. +1.668
for a total 2.955 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 0.995867,-0.078849,-0.045084 -w ibex-sun -t 2018/03:15:19:23:40
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.995867,-0.078849,-0.045084
which is R.A. +355.473 Decl. -2.584
missing R.A. +355.427 Decl. -2.000 (ibex-sun)
error is R.A. +0.046 Decl. +0.584
for a total 0.586 deg
ibex_rotate -o -u 0.995867,-0.078849,-0.045084 -w ibex-sun -t 2018/03:15:20:58:46
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.995867,-0.078849,-0.045084
which is R.A. +355.473 Decl. -2.584
missing R.A. +355.487 Decl. -1.973 (ibex-sun)
error is R.A. +0.014 Decl. +0.611
for a total 0.611 deg
ibex_rotate -o -u 0.995867,-0.078849,-0.045084 -w ibex-sun -t 2018/03:20:04:55:12
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.995867,-0.078849,-0.045084
which is R.A. +355.473 Decl. -2.584
missing R.A. +359.318 Decl. -0.269 (ibex-sun)
error is R.A. +3.845 Decl. +2.315
for a total 4.487 deg
The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 401 apogee:
ibex_rotate -o -u 0.998962,-0.037224,-0.026264 -w ibex-sun -t 2018/03:20:07:19:22
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.998962,-0.037224,-0.026264
which is R.A. +357.866 Decl. -1.505
missing R.A. +359.407 Decl. -0.234 (ibex-sun)
error is R.A. +1.541 Decl. +1.271
for a total 1.998 deg
ibex_rotate -o -u 0.998962,-0.037224,-0.026264 -w ibex-sun -t 2018-03-25T05:27:15.169Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.998962,-0.037224,-0.026264
which is R.A. +357.866 Decl. -1.505
missing R.A. +4.023 Decl. +1.727 (ibex-sun)
error is R.A. +353.843 Decl. +3.232
for a total 6.953 deg
No Lo O-mode.
There is no overlap with orbit 399 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
On February 28, 2018 at 10:30 AM "Wesley, Sheral" <Sheral.Wesley@OrbitalATK.com> wrote:
Guys,
Here are the planning products and ATS for Orbit# 400.
Please respond to this email thread with your comments and approvals
Approvals are required before 1 Mar 18 @2200 UTC
Note the following:
1. Battery Balancing at Perigee
Orbit# 400 PERIGEE Battery Balancing
# 2018-03-20T16:31:40.739Z,Perigee,orbit:400
SetLongEclipseFlag TRUE $TIME=2018/03:20:16:00:00
SetLongEclipseFlag FALSE $TIME=2018/03:20:17:30:00
2. Command Load Constraint Violation Report
IBEX_2018_070_o0400a_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 2018/03/12 05:18:24 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2018/03/15 20:28:46 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Sheral R. Wesley
Sr Systems Engineer
IBEX , OCO2 Mission OPS
CRS/CYGNUS Mission Planning
Bldg. 2 Room 1337
Office (703) 406-5641
Cell (202) 236-0802
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Thank you.
*********************