All,

I have looked at the orbit 430 ATS,

IBEX_2018_343_o0430a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2018_343_o0430a_v001_.ccvr

are from the length and proximity of two contacts and 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_343_o0430a_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_343_o0430a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage.  The outage starts about 36 hours after 15 Re ascending and runs for 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_Orbit430_Contacts.txt,

for all contacts (4).

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 429 left us pointing in safe directions for the orbit 430 arc A ascending and descending sequences:

ibex_rotate -o -u -0.211893,-0.892545,-0.398077 -w ibex-sun -t 2018/12:09:12:27:51

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.211893,-0.892545,-0.398077

which is R.A. +256.645 Decl. -23.458

missing R.A. +256.033 Decl. -22.841 (ibex-sun)

error is R.A. +0.612 Decl. +0.617

for a total 0.835 deg

ibex_rotate -o -u -0.211893,-0.892545,-0.398077 -w ibex-sun -t 2018/12:13:13:52:17

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.211893,-0.892545,-0.398077

which is R.A. +256.645 Decl. -23.458

missing R.A. +260.416 Decl. -23.149 (ibex-sun)

error is R.A. +3.771 Decl. +0.309

for a total 3.477 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 -0.135262,-0.905276,-0.402715 -w ibex-sun -t 2018/12:13:15:34:59

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.135262,-0.905276,-0.402715

which is R.A. +261.502 Decl. -23.748

missing R.A. +260.493 Decl. -23.153 (ibex-sun)

error is R.A. +1.009 Decl. +0.595

for a total 1.100 deg

ibex_rotate -o -u -0.135262,-0.905276,-0.402715 -w ibex-sun -t 2018/12:13:17:10:31

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.135262,-0.905276,-0.402715

which is R.A. +261.502 Decl. -23.748

missing R.A. +260.566 Decl. -23.156 (ibex-sun)

error is R.A. +0.936 Decl. +0.592

for a total 1.043 deg

ibex_rotate -o -u -0.135262,-0.905276,-0.402715 -w ibex-sun -t 2018/12:17:12:35:14

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.135262,-0.905276,-0.402715

which is R.A. +261.502 Decl. -23.748

missing R.A. +264.810 Decl. -23.326 (ibex-sun)

error is R.A. +3.308 Decl. +0.422

for a total 3.062 deg

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 431 apogee:

ibex_rotate -o -u -0.054073,-0.912036,-0.406529 -w ibex-sun -t 2018/12:17:15:02:02

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.054073,-0.912036,-0.406529

which is R.A. +266.607 Decl. -23.987

missing R.A. +264.929 Decl. -23.333 (ibex-sun)

error is R.A. +1.678 Decl. +0.654

for a total 1.670 deg

ibex_rotate -o -u -0.054073,-0.912036,-0.406529 -w ibex-sun -t 2018-12-22T14:15:12.976Z

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.054073,-0.912036,-0.406529

which is R.A. +266.607 Decl. -23.987

missing R.A. +270.421 Decl. -23.441 (ibex-sun)

error is R.A. +3.814 Decl. +0.546

for a total 3.534 deg

No Lo O-mode.

There is no overlap with orbit 429 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken

On November 26, 2018 at 6:20 PM "Perry, Timothy" <Timothy.Perry@ngc.com> wrote:

All,

   Attached are the planning files for Orbit #430.

Please respond to this thread with comments and approvals.

Approvals are required by COB  28 Nov 18.

 

Note the Following:

1.       Battery Balancing

Please note that the battery balancing is normally performed  around perigee. This time since we will be doing the star tracker image dump close to perigee. The battery balancing will be done between the first and second perigee contacts.    

# 2018-12-18T00:09:07.036Z,Perigee,orbit:430

  @ECT_SetLongEclipseFlag TRUE $TIME=2018/12:17:20:00:00

  @ECT_SetLongEclipseFlag FALSE $TIME=2018/12:17:21:30:00 

 

2.       IBEX_2018_343_o0430a_v001_.ccvr

The 2 IBX-CLC-006 errors are because of the 2 perigee contacts that are close to each other. This is an acceptable error message.

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

HARD CONSTRAINT VIOLATIONS

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

NO VIOLATIONS.

 

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

SOFT CONSTRAINT VIOLATIONS

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

IBX-CLC-006: Planned transmission at 2018/12/18 04:28:00 UTC - 2018/12/18

             06:02:00 UTC exceeds the maximum contiguous transmission time of

             5400 seconds

IBX-CLC-006: Planned transmission at 2018/12/18 07:58:00 UTC - 2018/12/18

             09:02:00 UTC is preceded by one or more additional transmissions

             which, when combined, exceed the maximum transmission time of 5400

             seconds within a 18000-second window (total planned transmission

             time this window is 9480.000 seconds)

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

             transition to science mode at 2018/12/09 10:50:45 UTC

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

             transition to science mode at 2018/12/13 16:40:31 UTC

 

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

OTHER MESSAGES

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

NO MESSAGES.

 

 

 

 

 

 

Timothy E. Perry

CRS, IBEX, OCO-2 & TESS

Mission Operations

Tim.perry@ngc.com

Office (703) 406-5976

Cell (301) 606-1430

Corp Cell (571) 447-8977

 

 

 

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