All,

Note: Angle at orbit 467 arc B descending after the apogee sun precession maneuver:  4.325 deg

I have looked at the orbit 467 ATS,

IBEX_2019_314_o0467a_v001.scr,
 
and I approve.
 
The only constraint violations in
 
IBEX_2019_314_o0467a_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_314_o0467a_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_314_o0467a_v001.oef,
 
and as verified with ibex_orbit.
 
There is one star tracker outage.  The outage starts at perigee of orbit 466 and runs for 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_Orbit467_Contacts.txt,
 
for all contacts (2).
 
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 466 left us pointing in safe directions for the orbit 467 arc A ascending and descending sequences:
 
ibex_rotate -o -u -0.70876,-0.643612,-0.288831 -w ibex-sun -t 2019/11:10:17:22:09
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.708760,-0.643612,-0.288831
which is R.A. +222.242 Decl. -16.788
missing R.A. +225.310 Decl. -17.148 (ibex-sun)
error is R.A. +3.068 Decl. +0.360
for a total 2.957 deg
 
 
ibex_rotate -o -u -0.70876,-0.643612,-0.288831 -w ibex-sun -t 2019/11:14:22:37:03
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.708760,-0.643612,-0.288831
which is R.A. +222.242 Decl. -16.788
missing R.A. +229.487 Decl. -18.237 (ibex-sun)
error is R.A. +7.245 Decl. +1.449
for a total 7.059 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 +229.563 -d -18.255 -w ibex-sun -t 2019/11:15:00:25:11
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.615968,-0.722814,-0.313247
which is R.A. +229.563 Decl. -18.255
missing R.A. +229.563 Decl. -18.255 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
 
ibex_rotate -o -r +229.563 -d -18.255 -w ibex-sun -t 2019/11:15:01:55:17
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.615968,-0.722814,-0.313247
which is R.A. +229.563 Decl. -18.255
missing R.A. +229.627 Decl. -18.270 (ibex-sun)
error is R.A. +0.064 Decl. +0.015
for a total 0.062 deg
 
ibex_rotate -o -r +229.563 -d -18.255 -w ibex-sun -t 2019/11:19:05:28:18
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.615968,-0.722814,-0.313247
which is R.A. +229.563 Decl. -18.255
missing R.A. +233.994 Decl. -19.306 (ibex-sun)
error is R.A. +4.431 Decl. +1.051
for a total 4.325 deg

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 468 apogee:
 
ibex_rotate -o -u -0.584749,-0.74066,-0.330893 -w ibex-sun -t 2019/11:19:08:48:13
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.584749,-0.740660,-0.330893
which is R.A. +231.709 Decl. -19.323
missing R.A. +234.147 Decl. -19.347 (ibex-sun)
error is R.A. +2.438 Decl. +0.024
for a total 2.301 deg

ibex_rotate -o -u -0.584749,-0.74066,-0.330893 -w ibex-sun -t 2019-11-24T05:00:11.247Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.584749,-0.740660,-0.330893
which is R.A. +231.709 Decl. -19.323
missing R.A. +239.138 Decl. -20.406 (ibex-sun)
error is R.A. +7.429 Decl. +1.083
for a total 7.070 deg

No Lo O-mode.

There is no overlap with orbit 466 commands by manual inspection or by checking at


Command Approval Checklist is attached.

Ken
On October 28, 2019 at 3:42 PM "Perry, Timothy E [US] (IS)" <Timothy.Perry@ngc.com> wrote:

All,

   Attached are the planning files for Orbit #467

Please respond to this thread with comments and approvals.  

Approvals are required by COB on 30 Oct 2019

 

Please note the following:

1.       No Battery balancing

 

2.       The second Perigee pass will be in the Orbit #468 ATS

IBEX,AUWA01,ADD,11/19/19,323,22:30:00,11/19/19,323,23:30:00,,LAHO 160K IBEX-2 Orbit# 467 SSR_Dump/Tracking Contact

 

3.       Command Load Constraint Violation Report (CCVR)

IBEX_2019_314_o0467a_v001.ccvr

# Input files:         1

#   IBEX_2019_314_o0467a_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 2019/11/10 14:27:18 UTC

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

             transition to science mode at 2019/11/15 01:25:17 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