[Isocops] FW: IBEX Orbit #439 ATS Approval ( 1 - 10 Mar ) - v001 approval
KEN FAIRCHILD
fair-play at comcast.net
Mon Feb 18 15:33:41 EST 2019
All,
I have looked at the orbit 439 ATS,
IBEX_2019_060_o0439a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2019_060o0439a_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_060_o0439a_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_060_o0439a_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_Orbit439_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 438 left us pointing in safe directions for the orbit 439 arc A ascending and descending sequences:
ibex_rotate -o -u 0.946998,-0.290539,-0.137047 -w ibex-sun -t 2019/03:01:17:14:57
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.946998,-0.290539,-0.137047
which is R.A. +342.944 Decl. -7.877
missing R.A. +342.074 Decl. -7.624 (ibex-sun)
error is R.A. +0.870 Decl. +0.253
for a total 0.899 deg
ibex_rotate -o -u 0.946998,-0.290539,-0.137047 -w ibex-sun -t 2019/03:05:08:57:56
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.946998,-0.290539,-0.137047
which is R.A. +342.944 Decl. -7.877
missing R.A. +345.567 Decl. -6.174 (ibex-sun)
error is R.A. +2.623 Decl. +1.703
for a total 3.111 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 0.969799,-0.219924,-0.105466 -w ibex-sun -t 2019/03:05:10:41:04
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.969799,-0.219924,-0.105466
which is R.A. +347.223 Decl. -6.054
missing R.A. +345.633 Decl. -6.145 (ibex-sun)
error is R.A. +1.590 Decl. +0.091
for a total 1.584 deg
ibex_rotate -o -u 0.969799,-0.219924,-0.105466 -w ibex-sun -t 2019/03:05:12:16:10
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.969799,-0.219924,-0.105466
which is R.A. +347.223 Decl. -6.054
missing R.A. +345.694 Decl. -6.119 (ibex-sun)
error is R.A. +1.529 Decl. +0.065
for a total 1.522 deg
ibex_rotate -o -u 0.969799,-0.219924,-0.105466 -w ibex-sun -t 2019/03:10:01:42:14
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.969799,-0.219924,-0.105466
which is R.A. +347.223 Decl. -6.054
missing R.A. +349.791 Decl. -4.373 (ibex-sun)
error is R.A. +2.568 Decl. +1.681
for a total 3.060 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 440 apogee:
ibex_rotate -o -u 0.986167,-0.147736,-0.075153 -w ibex-sun -t 2019/03:10:05:05:34
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.986167,-0.147736,-0.075153
which is R.A. +351.480 Decl. -4.310
missing R.A. +349.922 Decl .-4.324 (ibex-sun)
error is R.A. +1.558 Decl. +0.014
for a total 1.553 deg
ibex_rotate -o -u 0.986167,-0.147736,-0.075153 -w ibex-sun -t 2019-03-15T03:48:48.897Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.986167,-0.147736,-0.075153
which is R.A. +351.480 Decl. -4.310
missing R.A. +354.597 Decl. -2.336 (ibex-sun)
error is R.A. +3.117 Decl. +1.974
for a total 3.685 deg
No Lo O-mode.
There is no overlap with orbit 438 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
> On February 16, 2019 at 11:33 AM "Perry, Timothy" <Timothy.Perry at ngc.com> wrote:
>
>
> Ken
>
> I received a failed to deliver message. So, here is the second try.
>
> Tim
>
>
>
> Timothy E.Perry
>
> CRS IBEX OCO-2
>
> Mission Operations
>
> tim.perry at orbitalatk.com
>
> Office (703) 406-5976
>
> Cell (301) 606-1430
>
> [cid:image001.jpg at 01D04F4E.6B1BECE0]
>
>
>
>
>
> From: Perry, Timothy
> Sent: Friday, February 15, 2019 11:39 AM
> To: Bobbett, James <James.Bobbett at ngc.com>; Bret Hautamaki <bhautama at gmail.com>; Chubin, Eric <Eric.Chubin at ngc.com>; Colin Joyce <colin.joyce at unh.edu>; Dreyer, Sean <Sean.Dreyer at ngc.com>; Ed Fleming <Fleming.Ed at orbital.com>; Ibex Mission Operations <ibexops at gmail.com>; IBEX-FDG <IBEX.fdg at applieddefense.com>; ISOC at New Hampshire <isocops at lists.sr.unh.edu>; John Cavallo <Cavallo.John at orbital.com>; Ken Fairchild <fair-play at comcast.net>; Nigel Angold <nigel.angold at nasa.gov>; Ryan Tyler <Tyler.Ryan at orbital.com>; Sheral Wesley <Wesley.Sheral at orbital.com>; Tim Perry <Perry.Tim at orbital.com>; Zirnstein, Eric <ezirnstein at swri.edu>
> Subject: IBEX Orbit #439 ATS Approval ( 1 - 10 Mar )
>
>
>
> All,
>
> Attached are the planning files for Orbit #439.
>
> Please respond to this thread with comments and approvals.
>
> Approvals are required by COB on 18 Feb 2019.
>
>
>
> Please Note the following:
>
> 1. Orbit 439 Battery Balancing
>
> 2019-03-10T11:29:20.302Z,Perigee,orbit:439
>
> @ECT_SetLongEclipseFlag TRUE $TIME=2019/03:10:11:00:00
>
> @ECT_SetLongEclipseFlag FALSE $TIME=2019/03:10:12:30:00
>
>
>
> 2. IBEX_2019_060o0439a_v001_.ccvr
>
> # IBEX_2019_060_o0439a_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 2019/03/01 15:05:22 UTC
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2019/03/05 11:46:10 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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> *********************
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