[Isocops] IBEX Orbit #429 ATS Approval ( 30 Nov - 09 Dec ) - v001 approval
Ken Fairchild
fair-play at comcast.net
Tue Nov 20 22:47:57 EST 2018
All,
I have looked at the orbit 429 ATS,
IBEX_2018_334_o0429a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2018_334_o0429a_v001_.ccvr
are from the proximity of two contacts and 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_334_o0429a_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_334_o0429a_v001.oef,
and as verified with ibex_orbit.
There are no star tracker outages.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit429_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 428 left us pointing in safe directions for the orbit 429 arc A ascending and descending sequences:
ibex_rotate -o -u -0.420876,-0.828588,-0.369195 -w ibex-sun -t 2018/11:30:15:33:22
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.420876,-0.828588,-0.369195
which is R.A. +243.072 Decl. -21.666
missing R.A. +246.382 Decl. -21.687 (ibex-sun)
error is R.A. +3.310 Decl. +0.021
for a total 3.076 deg
ibex_rotate -o -u -0.420876,-0.828588,-0.369195 -w ibex-sun -t 2018/12:04:03:03:45
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.420876,-0.828588,-0.369195
which is R.A. +243.072 Decl. -21.666
missing R.A. +250.055 Decl. -22.185 (ibex-sun)
error is R.A. +6.983 Decl. +0.519
for a total 6.498 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 -0.317803,-0.865955,-0.386164 -w ibex-sun -t 2018/12:04:04:46:53
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.317803,-0.865955,-0.386164
which is R.A. +249.847 Decl. -22.716
missing R.A. +250.131 Decl. -22.193 (ibex-sun)
error is R.A. +0.284 Decl. +0.523
for a total 0.585 deg
ibex_rotate -o -u -0.317803,-0.865955,-0.386164 -w ibex-sun -t 2018/12:04:06:21:59
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.317803,-0.865955,-0.386164
which is R.A. +249.847 Decl. -22.716
missing R.A. +250.202 Decl. -22.201 (ibex-sun)
error is R.A. +0.355 Decl. +0.515
for a total 0.610 deg
ibex_rotate -o -u -0.317803,-0.865955,-0.386164 -w ibex-sun -t 2018/12:08:12:56:02
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.317803,-0.865955,-0.386164
which is R.A. +249.847 Decl. -22.716
missing R.A. +254.907 Decl. -22.685 (ibex-sun)
error is R.A. +5.060 Decl. +0.031
for a total 4.668 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 430 apogee:
ibex_rotate -o -u -0.211893,-0.892545,-0.398077 -w ibex-sun -t 2018/12:08:15:20:51
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.211893,-0.892545,-0.398077
which is R.A. +256.645 Decl. -23.458
missing R.A. +255.024 Decl. -22.700 (ibex-sun)
error is R.A. +1.621 Decl. +0.758
for a total 1.673 deg
ibex_rotate -o -u -0.211893,-0.892545,-0.398077 -w ibex-sun -t 2018-12-13T12:08:03.119Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.211893,-0.892545,-0.398077
which is R.A. +256.645 Decl. -23.458
missing R.A. +260.337 Decl. -23.146 (ibex-sun)
error is R.A. +3.692 Decl. +0.313
for a total 3.405 deg
No Lo O-mode.
There is no overlap with orbit 428 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
> On November 16, 2018 at 4:53 PM "Perry, Timothy" <Timothy.Perry at ngc.com> wrote:
>
>
> All,
>
> Attached are the planning files for Orbit #429.
>
> Please respond to this thread with comments and approvals.
>
> Approvals are required by COB 26 Dec 18.
>
>
>
> Note the Following:
>
> 1. Uplink Opportunities:
>
> Since the ATS IBEX_2018_325_o0428a_LGC_v001.scr will be uplinked during the perigee contacts for Orbit #427. The following contacts will be used for the Orbit# 429 ATS uplink.
>
> IBEX,USHI01,ADD,11/27/18,331,23:30:00,11/28/18,332,00:05:00,,LAHO 2K IBEX-3 Orbit# 428 Tracking Contact
>
> IBEX,AUWA01,ADD,11/29/18,333,19:30:00,11/29/18,333,20:30:00,,LAHO 160K Orbit # 428 SSR_Dump/Tracking Contact
>
> 2. Battery Balancing
>
> # Orbit# 429 PERIGEE Battery Balancing
>
> # 2018-12-09T00:43:36.668Z,Perigee,orbit:429
>
> @ECT_SetLongEclipseFlag TRUE $TIME=2018/12:09:00:30:00
>
> @ECT_SetLongEclipseFlag FALSE $TIME=2018/12:09:02:00:00
>
>
>
> 3. IBEX_2018_334_o0429a_v001_.ccvr
>
> The following “IBX-CLC-006” errors are acceptable. The maximum transmission time of 90 minutes was exceeded for the 5 hour period. This is acceptable since we have 2 60 minute contacts with a 4 hour 30 minute gap between the 2 contacts for transmitter cool down time.
>
> IBEX,AUWA01,ADD,12/08/18,342,11:00:00,12/08/18,342,12:00:00,,LAHO 64K IBEX-3 Orbit # 430 Lo Sweep Hi BG test Start
>
> IBEX,AUWA01,ADD,12/08/18,342,16:30:00,12/08/18,342,17:30:00,,LAHO 160K IBEX-3 Orbit # 429 SSR_Dump/Tracking Contact
>
>
>
> ==========================
>
> HARD CONSTRAINT VIOLATIONS
>
> ==========================
>
> NO VIOLATIONS.
>
>
>
> ==========================
>
> SOFT CONSTRAINT VIOLATIONS
>
> ==========================
>
> IBX-CLC-006: Planned transmission at 2018/12/08 10:58:00 UTC - 2018/12/08
>
> 12:02:00 UTC is followed by one or more additional transmissions
>
> which, when combined, exceed the maximum transmission time of 5400
>
> seconds within a 18000-second window (total planned transmission
>
> time this window is 5880.000 seconds)
>
> IBX-CLC-006: Planned transmission at 2018/12/08 16:28:00 UTC - 2018/12/08
>
> 17:32:00 UTC is preceded by one or more additional transmissions
>
> which, when combined, exceed the maximum transmission time of 5400
>
> seconds within a 18000-second window (total planned transmission
>
> time this window is 5880.000 seconds)
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2018/11/30 13:53:40 UTC
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2018/12/04 05:51:59 UTC
>
>
>
> ==============
>
> OTHER MESSAGES
>
> ==============
>
> NO MESSAGES.
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> Timothy E. Perry
>
> Mission Operations
>
> CRS, IBEX, OCO-2 & TESS
>
> RAPTOR Test Team
>
> timothy.perry at ngc.com mailto:timothy.perry at ngc.com
>
> Office (703) 406-5976
>
> Cell (301) 606-1430
>
>
>
>
>
>
>
> ---------------------------------------------
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