[Isocops] IBEX Orbit #428 ATS Approval ( 21 - 30 Nov ) - v001 approval
Ken Fairchild
fair-play at comcast.net
Sat Nov 10 23:23:17 EST 2018
All,
I have looked at the orbit 428 ATS,
IBEX_2018_325_o0428a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2018_325_o0428a_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_325_o0428a_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_325_o0428a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. The outage starts 9+ hours after 15 Re ascending and runs for more than 1 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_Orbit428_Contacts.txt,
for all contacts (3).
We are not doing battery cell balancing this orbit; we'll do it again in the next orbit.
The inertial maneuver at perigee of orbit 427 left us pointing in safe directions for the orbit 428 arc A ascending and descending sequences:
ibex_rotate -o -u -0.559607,-0.756679,-0.338048 -w ibex-sun -t 2018/11:21:14:27:43
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.559607,-0.756679,-0.338048
which is R.A. +233.515 Decl. -19.758
missing R.A. +236.768 Decl. -19.955 (ibex-sun)
error is R.A. +3.253 Decl. +0.197
for a total 3.066 deg
ibex_rotate -o -u -0.559607,-0.756679,-0.338048 -w ibex-sun -t 2018/11:25:04:10:00
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.559607,-0.756679,-0.338048
which is R.A. +233.515 Decl. -19.758
missing R.A. +240.430 Decl. -20.674 (ibex-sun)
error is R.A. +6.915 Decl. +0.916
for a total 6.553 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 -0.490666,-0.795325,-0.355955 -w ibex-sun -t 2018/11:25:05:53:08
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.490666,-0.795325,-0.355955
which is R.A. +238.328 Decl. -20.852
missing R.A. +240.505 Decl. -20.686 (ibex-sun)
error is R.A. +2.177 Decl. +0.166
for a total 2.042 deg
ibex_rotate -o -u -0.490666,-0.795325,-0.355955 -w ibex-sun -t 2018/11:25:07:28:14
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.490666,-0.795325,-0.355955
which is R.A. +238.328 Decl. -20.852
missing R.A. +240.574 Decl. -20.698 (ibex-sun)
error is R.A. +2.246 Decl. +0.154
for a total 2.106 deg
ibex_rotate -o -u -0.490666,-0.795325,-0.355955 -w ibex-sun -t 2018/11:29:16:11:39
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.490666,-0.795325,-0.355955
which is R.A. +238.328 Decl. -20.852
missing R.A. +245.294 Decl. -21.469 (ibex-sun)
error is R.A. +6.966 Decl. +0.617
for a total 6.525 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 429 apogee:
ibex_rotate -o -u -0.420876,-0.828588,-0.369195 -w ibex-sun -t 2018/11:29:18:37:03
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. +245.409 Decl. -21.491 (ibex-sun)
error is R.A. +2.337 Decl. +0.175
for a total 2.180 deg
ibex_rotate -o -u -0.420876,-0.828588,-0.369195 -w ibex-sun -t 2018-12-04T14:33:57.654Z
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. +250.568 Decl. -22.241 (ibex-sun)
error is R.A. +7.496 Decl. +0.575
for a total 6.976 deg
No Lo O-mode.
There is no overlap with orbit 427 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
> On November 7, 2018 at 5:47 PM "Perry, Timothy" <Timothy.Perry at ngc.com> wrote:
>
>
> All,
>
> Attached are the planning files for Orbit #428.
>
> Please respond to this thread with comments and approvals.
>
> Approvals are required by COB 10 Nov 18.
>
>
>
> Note the Following:
>
> 1. IBEX_2018_325_o0428a_v001_.ccvr
>
> # Input files: 1
>
> # IBEX_2018_325_o0428a_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 2018/11/21 12:44:44 UTC
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2018/11/25 06:58:14 UTC
>
>
>
> ==============
>
> OTHER MESSAGES
>
> ==============
>
> NO MESSAGES.
>
>
>
> 2. No Battery Balancing
>
>
>
>
>
>
>
> Timothy E. Perry
>
> CRS, IBEX, OCO-2 & TESS
>
> Mission Operations
>
> Tim.perry at ngc.com mailto:Tim.perry at ngc.com
>
> Office (703) 406-5976
>
> Cell (301) 606-1430
>
> Corp Cell (571) 447-8977
>
>
>
> [cid:image002.png at 01D43627.CCEBFFF0]
>
>
>
>
>
>
>
> ---------------------------------------------
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> *********************
>
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