I have looked at the orbit 469 ATS,

IBEX_2019_332_o0469a_v001.scr,

and I approve.

The only constraint violations in

IBEX_2019_332_o0469a_v001.ccvr

are from the removal of the

ACT_SetSpinPulseProtectEnable Enable

commands (2) and the proximity of two contacts; the violations are expected.

The PL commands in the v001 ATS match those in the v002 STF,

IBEX_2019_332_o0469a_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_332_o0469a_v001.oef,

and as verified with ibex_orbit.

There is one star tracker outage. The outage starts 1+ days after 15 Re ascending and runs for 1- 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_Orbit469_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 468 left us pointing in safe directions for the orbit 469 arc A ascending and descending sequences:

ibex_rotate -o -u -0.447194,-0.81702,-0.363999 -w ibex-sun -t 2019/11:29:04:10:22

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.447194,-0.817020,-0.363999

which is R.A. +241.306 Decl. -21.346

missing R.A. +244.527 Decl. -21.394 (ibex-sun)

error is R.A. +3.221 Decl. +0.048

for a total 3.000 deg

ibex_rotate -o -u -0.447194,-0.81702,-0.363999 -w ibex-sun -t 2019/12:02:21:22:15

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.447194,-0.817020,-0.363999

which is R.A. +241.306 Decl. -21.346

missing R.A. +248.446 Decl. -21.961 (ibex-sun)

error is R.A. +7.140 Decl. +0.615

for a total 6.664 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 -0.342625,-0.858056,-0.382554 -w ibex-sun -t 2019/12:02:23:05:23

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.342625,-0.858056,-0.382554

which is R.A. +248.233 Decl. -22.492

missing R.A. +248.522 Decl. -21.971 (ibex-sun)

error is R.A. +0.289 Decl. +0.521

for a total 0.586 deg

ibex_rotate -o -u -0.342625,-0.858056,-0.382554 -w ibex-sun -t 2019/12:03:00:40:29

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.342625,-0.858056,-0.382554

which is R.A. +248.233 Decl. -22.492

missing R.A. +248.593 Decl. -21.979 (ibex-sun)

error is R.A. +0.360 Decl. +0.513

for a total 0.611 deg

ibex_rotate -o -u -0.342625,-0.858056,-0.382554 -w ibex-sun -t 2019/12:07:14:16:49

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.342625,-0.858056,-0.382554

which is R.A. +248.233 Decl. -22.492

missing R.A. +253.602 Decl. -22.563 (ibex-sun)

error is R.A. +5.369 Decl. +0.071

for a total 4.960 deg

The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 470 apogee:

ibex_rotate -o -u -0.234192,-0.887887,-0.395994 -w ibex-sun -t 2019/12:07:17:48:24

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.234192,-0.887887,-0.395994

which is R.A. +255.224 Decl. -23.328

missing R.A. +253.773 Decl. -22.587 (ibex-sun)

error is R.A. +1.451 Decl. +0.741

for a total 1.528 deg

ibex_rotate -o -u -0.234192,-0.887887,-0.395994 -w ibex-sun -t 2019-12-12T17:02:23.426Z

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.234192,-0.887887,-0.395994

which is R.A. +255.224 Decl. -23.328

missing R.A. +259.182 Decl. -23.058 (ibex-sun)

error is R.A. +3.958 Decl. +0.270

for a total 3.648 deg

No Lo O-mode.

There is no overlap with orbit 468 commands by manual inspection or by checking at

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

Command Approval Checklist is attached.

Ken

All,

Attached are the planning files for Orbit #469

Please respond to this thread with comments and approvals.

Approvals are required by COB on 18 Nov 2019

Please note the following:

1. # Orbit 469 Battery Balancing

# 2019-12-07T23:43:45.916Z,Perigee,orbit:469

@ECT_SetLongEclipseFlag TRUE $TIME=2019/12:07:23:00:00

@ECT_SetLongEclipseFlag FALSE $TIME=2019/12:08:00:30:00

2. Command Load Constraint Violation Report (CCVR)

The 2 IBX-CLC-006 Soft violations is because we have the 2 contacts that are separated by 4.5 hours. This should not be a problem.

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

HARD CONSTRAINT VIOLATIONS

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

NO VIOLATIONS.

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

SOFT CONSTRAINT VIOLATIONS

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

IBX-CLC-006: Planned transmission at 2019/12/07 11:58:00 UTC - 2019/12/07

13:02:00 UTC is followed 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 5880.000 seconds)

IBX-CLC-006: Planned transmission at 2019/12/07 17:28:00 UTC - 2019/12/07

18:32:00 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 5880.000 seconds)

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

transition to science mode at 2019/11/29 01:40:15 UTC

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

transition to science mode at 2019/12/03 00:10:29 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