All,

Note: Angle at orbit 432 arc B descending after the apogee sun precession maneuver: 4.049 deg

I have looked at the orbit 432 ATS,

IBEX_2018_361_o0432a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2018_261_o0432a_v001_.ccvr (incorrect day number)

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_361_o0432a_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_361_o0432a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage. The outage starts 2- days after 15 Re ascending and runs for almost 4 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_Orbit432_Contacts.txt,

for all contacts (3).

There is an eclipse near perigee. The LE flag commands are correct, agree with Ryan's timing recommendations and are offset by enough time from other commands.

The inertial maneuver at perigee of orbit 431 left us pointing in safe directions for the orbit 432 arc A ascending and descending sequences:

ibex_rotate -o -u 0.108493,-0.907965,-0.404759 -w ibex-sun -t 2018/12:27:15:31:08

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.108493,-0.907965,-0.404759

which is R.A. +276.814 Decl. -23.876

missing R.A. +276.096 Decl. -23.343 (ibex-sun)

error is R.A. +0.718 Decl. +0.533

for a total 0.847 deg

ibex_rotate -o -u 0.108493,-0.907965,-0.404759 -w ibex-sun -t 2018/12:31:14:08:00

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.108493,-0.907965,-0.404759

which is R.A. +276.814 Decl. -23.876

missing R.A. +280.410 Decl. -23.096 (ibex-sun)

error is R.A. +3.596 Decl. +0.780

for a total 3.389 deg

The sun 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 -r +280.492 -d -23.090 -w ibex-sun -t 2018/12:31:15:56:08

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.167510,-0.904510,-0.392177

which is R.A. +280.492 Decl. -23.090

missing R.A. +280.492 Decl. -23.090 (ibex-sun)

error is R.A. +0.000 Decl. +0.000

for a total 0.000 deg

ibex_rotate -o -r +280.492 -d -23.090 -w ibex-sun -t 2018/12:31:17:26:14

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.167510,-0.904510,-0.392177

which is R.A. +280.492 Decl. -23.090

missing R.A. +280.560 Decl. -23.084 (ibex-sun)

error is R.A. +0.068 Decl. +0.006

for a total 0.063 deg

ibex_rotate -o -r +280.492 -d -23.090 -w ibex-sun -t 2019/01:04:15:33:38

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.167510,-0.904510,-0.392177

which is R.A. +280.492 Decl. -23.090

missing R.A. +284.868 Decl. -22.707 (ibex-sun)

error is R.A. +4.376 Decl. +0.383

for a total 4.049 deg

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 433 apogee:

ibex_rotate -o -u 0.265226,-0.880525,-0.392851 -w ibex-sun -t 2019/01:04:18:01:39

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.265226,-0.880525,-0.392851

which is R.A. +286.763 Decl. -23.132

missing R.A. +284.987 Decl. -22.700 (ibex-sun)

error is R.A. +1.776 Decl. +0.432

for a total 1.692 deg

ibex_rotate -o -u 0.265226,-0.880525,-0.392851 -w ibex-sun -t 2019-01-09T16:01:14.199Z

Quaternion +0.000000,+0.000000,+0.000000,+0.000000

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.265226,-0.880525,-0.392851

which is R.A. +286.763 Decl. -23.132

missing R.A. +290.400 Decl. -22.115 (ibex-sun)

error is R.A. +3.637 Decl. +1.017

for a total 3.507 deg

No Lo O-mode.

There is no overlap with orbit 431 commands by manual inspection or by checking at

http://ibex.unh.edu/cgi-bin/ats.cgi.

Command Approval Checklist is attached.

Ken

On December 13, 2018 at 5:09 PM "Perry, Timothy" <Timothy.Perry@ngc.com> wrote:

All,
   Attached are the planning files for Orbit #432.
Please respond to this thread with comments and approvals.
Approvals are required by COB 16 Dec 2018.

Note the Following:
1.    # Orbit# 432 Moderate Eclipse
# 2019-01-05T02:38:33.896Z,EclipseEntry,moderate:true,long:false,orbit:432
# 2019-01-05T03:15:06.606Z,Perigee,orbit:432
# 2019-01-05T03:35:07.147Z,EclipseExit,moderate:true,long:false,orbit:432
  @ECT_SetLongEclipseFlag TRUE $TIME=2019/01:05:01:00:00
@ECT_SetLongEclipseFlag FALSE $TIME=2019/01:05:04:00:00

2.    IBEX_2018_261_o0432a_v001_.ccvr
# Input files:         1
#   IBEX_2018_361_o0432a_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 2018/12/27 13:51:04 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
             transition to science mode at 2018/12/31 16:56:14 UTC

==============
OTHER MESSAGES
==============
NO MESSAGES.

Timothy E. Perry
Mission Operations
CRS, IBEX, OCO-2 & TESS
RAPTOR Test Team
timothy.perry@ngc.com
Office (703) 406-5976
Cell (301) 606-1430

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Thank you.
*********************