IBEX_2017_236_o0378a_v001.scr,
IBEX_2017_236_o0378a_v001.ccvr
ACT_SetSpinPulseProtectEnable Enable
commands (2); the violations are expected.
The PL commands in the v001 ATS match those in the v002 STF,
IBEX_2017_236_o0378a_v002.stf,
except the ATS has an SSR_DUMP_NEW command. This is expected as APL is being used for the dump pass.
Ascending and descending command sequences are consistent with each other and 15 Re ascending, the apogee maneuver time and 15 Re descending as determined from the OEF,
IBEX_2017_236_o0378a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. The outage starts about 2 hours after perigee and runs for 7+ hours. No despinning should be required due to this outage.
There is one moon in Lo FOV session in arc B. The ATS start time is about an hour after that in the OEF and the ATS end time is about 2 hours before that in the OEF. These differences are not unusual.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit378_Contacts.txt,
for all contacts (3).
No battery cell balancing this orbit; we'll do it again in the next orbit.
The inertial maneuver at perigee of orbit 377 left us pointing in safe directions for the orbit 378 arc A ascending and descending sequences:
ibex_rotate -o -u -0.85244,0.483348,0.1993 -w ibex-sun -t 2017/08:24:11:53:42
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.852440,+0.483348,+0.199300
which is R.A. +150.446 Decl. +11.496
missing R.A. +153.278 Decl. +11.010 (ibex-sun)
error is R.A. +2.832 Decl. +0.486
for a total 2.820 deg
ibex_rotate -o -u -0.85244,0.483348,0.1993 -w ibex-sun -t 2017/08:28:02:39:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.852440,+0.483348,+0.199300
which is R.A. +150.446 Decl. +11.496
missing R.A. +156.528 Decl. +9.770 (ibex-sun)
error is R.A. +6.082 Decl. +1.726
for a total 6.222 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 -0.88967,0.422922,0.172118 -w ibex-sun -t 2017/08:28:04:22:09
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.889670,+0.422922,+0.172118
which is R.A. +154.575 Decl. +9.911
missing R.A. +156.595 Decl. +9.745 (ibex-sun)
error is R.A. +2.020 Decl. +0.166
for a total 1.997 deg
ibex_rotate -o -u -0.88967,0.422922,0.172118 -w ibex-sun -t 2017/08:28:05:57:15
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.889670,+0.422922,+0.172118
which is R.A. +154.575 Decl. +9.911
missing R.A. +156.656 Decl. +9.722 (ibex-sun)
error is R.A. +2.081 Decl. +0.189
for a total 2.059 deg
ibex_rotate -o -u -0.88967,0.422922,0.172118 -w ibex-sun -t 2017/09:01:16:40:22
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.889670,+0.422922,+0.172118
which is R.A. +154.575 Decl. +9.911
missing R.A. +160.811 Decl. +8.134 (ibex-sun)
error is R.A. +6.236 Decl. +1.777
for a total 6.409 deg
The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 379 apogee:
ibex_rotate -o -u -0.922547,0.357684,0.144805 -w ibex-sun -t 2017/09:01:19:02:28
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.922547,+0.357684,+0.144805
which is R.A. +158.808 Decl. +8.326
missing R.A. +160.900 Decl. +8.096 (ibex-sun)
error is R.A. +2.092 Decl. +0.230
for a total 2.083 deg
ibex_rotate -o -u -0.922547,0.357684,0.144805 -w ibex-sun -t 2017-09-06T17:26:37.136Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.922547,+0.357684,+0.144805
which is R.A. +158.808 Decl. +8.326
missing R.A. +165.236 Decl. +6.283 (ibex-sun)
error is R.A. +6.428 Decl. +2.043
for a total 6.695 deg
No Lo O-mode.
There is no overlap with orbit 377 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
Guys,
Here are the planning files and ATS for Orbit# 378.
Please respond to this email thread with your comments and approvals
Approvals are required before 13 Aug 17 @1900 UTC
Note the following
1. No Battery Balancing
2. Moon in Lo FOV
2017-08-31T03:59:59.897Z,MoonInLoFovStart,orbit:378
2017-08-31T19:56:28.346Z,MoonInLoFovStop,orbit:378
3. APL-18 SSR_Dump/Tracking Contact
IBEX,APL-18,ADD,09/02/17,245,12:00:00,09/02/17,245,13:00:00,,13re-Ascending Perigee 2K-320K IBEX Orbit# 378 SSR_Dump/Tracking Contact(13 Asc)
4. Command Load Constraint Violation Report
IBEX_2017_236_o0378a_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 2017/08/24 10:12:11 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2017/08/28 05:27:15 UTC
==============
OTHER MESSAGES
==============
NO MESSAGES.
Sheral R. Wesley
Sr Systems Engineer
IBEX Mission OPS
CRS/CYGNUS Mission Planning
Bldg. 2 Room 1337
Office (703) 406-5641
Cell (202) 236-0802