All,


I have looked at the orbit 464 ATS,


IBEX_2019_287_o0464a_v001.scr,


and I approve.


The only constraint violations in


IBEX_2019_287_o0464a_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_287_o0464a_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_287_o0464a_v001.oef,


and as verified with ibex_orbit.


There is one star tracker outage.  It starts at apogee of orbit 463 and ends 1- day after 15 Re ascending.  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_Orbit464_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 sun precession maneuver at perigee of orbit 463 left us pointing in safe directions for the orbit 464 arc A ascending and descending sequences:


ibex_rotate -o -r +198.401 -d -7.780 -w ibex-sun -t 2019/10:14:10:53:35

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.940136,-0.312760,-0.135370

which is R.A. +198.401 Decl. -7.780

missing R.A. +198.982 Decl. -8.047 (ibex-sun)

error is R.A. +0.581 Decl. +0.267

for a total 0.634 deg


ibex_rotate -o -r +198.401 -d -7.780 -w ibex-sun -t 2019/10:18:04:05:13

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.940136,-0.312760,-0.135370

which is R.A. +198.401 Decl. -7.780

missing R.A. +202.325 Decl. -9.354 (ibex-sun)

error is R.A. +3.924 Decl. +1.574

for a total 4.188 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 -0.925437,-0.343487,-0.15995 -w ibex-sun -t 2019/10:18:05:47:26

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.925437,-0.343487,-0.159950

which is R.A. +200.363 Decl. -9.204

missing R.A. +202.392 Decl. -9.379 (ibex-sun)

error is R.A. +2.029 Decl. +0.175

for a total 2.010 deg


ibex_rotate -o -u -0.925437,-0.343487,-0.15995 -w ibex-sun -t 2019/10:18:07:23:27

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.925437,-0.343487,-0.159950

which is R.A. +200.363 Decl. -9.204

missing R.A. +202.454 Decl. -9.402 (ibex-sun)

error is R.A. +2.091 Decl. +0.198

for a total 2.073 deg


ibex_rotate -o -u -0.925437,-0.343487,-0.15995 -w ibex-sun -t 2019/10:22:19:19:49

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.925437,-0.343487,-0.159950

which is R.A. +200.363 Decl. -9.204

missing R.A. +206.808 Decl. -11.043 (ibex-sun)

error is R.A. +6.445 Decl. +1.839

for a total 6.605 deg


The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 465 apogee:


ibex_rotate -o -u -0.892817,-0.409593,-0.187381 -w ibex-sun -t 2019/10:22:22:38:24

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.892817,-0.409593,-0.187381

which is R.A. +204.644 Decl. -10.800

missing R.A. +206.944 Decl. -11.099 (ibex-sun)

error is R.A. +2.300 Decl. +0.299

for a total 2.277 deg


ibex_rotate -o -u -0.892817,-0.409593,-0.187381 -w ibex-sun -t 2019-10-27T17:20:36.390Z

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.892817,-0.409593,-0.187381

which is R.A. +204.644 Decl. -10.800

missing R.A. +211.389 Decl. -12.718 (ibex-sun)

error is R.A. +6.745 Decl. +1.918

for a total 6.876 deg


No Lo O-mode.


There is no overlap with orbit 463 commands by manual inspection or by checking at


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


Command Approval Checklist is attached.


Ken



On October 2, 2019 at 10:23 AM "Perry, Timothy" <Timothy.Perry@ngc.com> wrote: 


All,

   Attached are the planning files for Orbit #464

Please respond to this thread with comments and approvals.  

Approvals are required by COB on 03 Oct 2019.  


Please note the following:

  1. No Battery Balancing

 

2.       2 Inertial maneuvers

 

3.       Command Load Constraint Violation Report (CCVR)

IBEX_2019_287_o0464a_v001.ccvr

Input files:         1

#   IBEX_2019_287_o0464a_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 2019/10/14 08:07:55 UTC

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

             transition to science mode at 2019/10/18 06:53:27 UTC

 

==============

OTHER MESSAGES

==============

NO MESSAGES.

 

Timothy E.Perry

CRS IBEX OCO-2

Mission Operations

timothy.perry@ngc.com

Office (703) 406-5976

Cell (301) 606-1430

 

cid:image001.png@01D542D6.6047A400

 

 


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