All,

I have looked at the orbit 448 ATS,

IBEX_2019_143_o0448a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2019_143_o0448a_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_143_o0448a_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_143_o0448a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage.  The outage starts about 7 1/2 hours before perigee and runs for 6+ hours.

The ground station command sequences are correct and the timing and bit rates match those in the contacts file,

IBEX_Orbit448_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 maneuver at perigee of orbit 447 left us pointing in safe directions for the orbit 448 arc A ascending and descending sequences:

ibex_rotate -o -u 0.512818,0.791241,0.333099 -w ibex-sun -t 2019/05:23:11:28:50

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.512818,+0.791241,+0.333099

which is R.A. +57.052 Decl. +19.457

missing R.A. +59.672 Decl. +20.492 (ibex-sun)

error is R.A. +2.620 Decl. +1.035

for a total 2.671 deg

ibex_rotate -o -u 0.512818,0.791241,0.333099 -w ibex-sun -t 2019/05:27:01:40:57

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.512818,+0.791241,+0.333099

which is R.A. +57.052 Decl. +19.457

missing R.A. +63.389 Decl. +21.177 (ibex-sun)

error is R.A. +6.337 Decl. +1.720

for a total 6.186 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 0.447381,0.824557,0.346346 -w ibex-sun -t 2019/05:27:03:24:05

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.447381,+0.824557,+0.346346

which is R.A. +61.517 Decl. +20.264

missing R.A. +63.463 Decl. +21.191 (ibex-sun)

error is R.A. +1.946 Decl. +0.927

for a total 2.042 deg

ibex_rotate -o -u 0.447381,0.824557,0.346346 -w ibex-sun -t 2019/05:27:04:59:11

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.447381,+0.824557,+0.346346

which is R.A. +61.517 Decl. +20.264

missing R.A. +63.531 Decl. +21.203 (ibex-sun)

error is R.A. +2.014 Decl. +0.939

for a total 2.105 deg

ibex_rotate -o -u 0.447381,0.824557,0.346346 -w ibex-sun -t 2019/05:31:14:37:16

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.447381,+0.824557,+0.346346

which is R.A. +61.517 Decl. +20.264

missing R.A. +67.956 Decl. +21.913 (ibex-sun)

error is R.A. +6.439 Decl. +1.649

for a total 6.229 deg

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 449 apogee:

ibex_rotate -o -u 0.37742,0.853224,0.359948 -w ibex-sun -t 2019/05:31:17:26:48

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.377420,+0.853224,+0.359948

which is R.A. +66.138 Decl. +21.097

missing R.A. +68.068 Decl. +21.924 (ibex-sun)

error is R.A. +1.930 Decl. +0.827

for a total 1.977 deg

ibex_rotate -o -u 0.37742,0.853224,0.359948 -w ibex-sun -t 2019-06-05T16:26:25.516Z

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.377420,+0.853224,+0.359948

which is R.A. +66.138 Decl. +21.097

missing R.A. +73.211 Decl. +22.540 (ibex-sun)

error is R.A. +7.073 Decl. +1.443

for a total 6.722 deg

No Lo O-mode.

There is no overlap with orbit 447 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken

On May 9, 2019 at 2:44 PM "Perry, Timothy" <Timothy.Perry@ngc.com> wrote:

All,

   Attached are the planning files for Orbit #448

Please respond to this thread with comments and approvals.

Approvals are required by COB 12 May 2019.

Please note the following:

1.    Orbit 448 Battery Balancing 

2019-06-01T01:30:23.925Z,Perigee,orbit:448 

  @ECT_SetLongEclipseFlag TRUE $TIME=2019/06:01:01:00:00

  @ECT_SetLongEclipseFlag FALSE $TIME=2019/06:01:02:30:00 

2.    # Filename:            IBEX_2019_143_o0448a_v001.ccvr

# File type:           Command Load Constraint Violation Report (CCVR)

#

# Create time:         2019/129.142420

# Plan period start:   2019/143.092600

# Plan period stop:    2019/152.000000

# Default time format: UTC

#

# Input files:         1

#   IBEX_2019_143_o0448a_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 2019/05/23 09:26:10 UTC

IBX-CLC-016: No command to enable spin pulse protection was found after

             transition to science mode at 2019/05/27 04:29:11 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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