Hi all,

I have looked at the orbit 0605 ATS file, IBEX_2023_108_o0605a_v001.scr and I approve.

The constraint violations in IBEX_2023_108_o0605a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.

The PL commands in IBEX_2023_108_o0605a_v001.scr match those in the STF, IBEX_2023_108_o0605a_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_2023_108_o0605a_v001.oef and as verified with ibex_orbit.

There is 1 star tracker outage this orbit. It lasts ~9 hours and ends ~43 minutes before the perigee maneuver begins.

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit605_Contacts.txt for all contacts (3).

Battery Balancing is 90 minutes long, more than 2 hours away from payload descending macros, and more than 15 minutes away from a maneuver.

The Sun maneuver at perigee of orbit 0604 left us pointing in safe directions for the orbit 0605 arc A ascending and descending sequences:

ibex_rotate -o -r +25.652 -d +10.640 -w ibex-sun -t 2023/04:18:23:53:22

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.885941,+0.425461,+0.184638

which is R.A. +25.652 Decl. +10.640

missing R.A. +26.329 Decl. +10.862 (ibex-sun)

error is R.A. +0.677 Decl. +0.222

for a total 0.701 deg

ibex_rotate -o -r +25.652 -d +10.640 -w ibex-sun -t 2023/04:22:18:33:20

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.885941,+0.425461,+0.184638

which is R.A. +25.652 Decl. +10.640

missing R.A. +29.927 Decl. +12.211 (ibex-sun)

error is R.A. +4.275 Decl. +1.571

for a total 4.475 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 0.86434,0.465283,0.19086 -w ibex-sun -t 2023/04:22:20:16:28

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.864340,+0.465283,+0.190860

which is R.A. +28.294 Decl. +11.003

missing R.A. +29.995 Decl. +12.236 (ibex-sun)

error is R.A. +1.701 Decl. +1.233

for a total 2.073 deg

ibex_rotate -o -u 0.86434,0.465283,0.19086 -w ibex-sun -t 2023/04:22:21:51:34

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.864340,+0.465283,+0.190860

which is R.A. +28.294 Decl. +11.003

missing R.A. +30.058 Decl. +12.259 (ibex-sun)

error is R.A. +1.764 Decl. +1.256

for a total 2.136 deg

ibex_rotate -o -u 0.86434,0.465283,0.19086 -w ibex-sun -t 2023/04:27:11:31:13

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.864340,+0.465283,+0.190860

which is R.A. +28.294 Decl. +11.003

missing R.A. +34.323 Decl. +13.751 (ibex-sun)

error is R.A. +6.029 Decl. +2.748

for a total 6.498 deg

The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0606 apogee:

ibex_rotate -o -u 0.82095,0.527405,0.218825 -w ibex-sun -t 2023/04:27:21:59:25

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.820950,+0.527405,+0.218825

which is R.A. +32.718 Decl. +12.640

missing R.A. +34.712 Decl. +13.863 (ibex-sun)

error is R.A. +1.994 Decl. +1.223

for a total 2.294 deg

ibex_rotate -o -u 0.82095,0.527405,0.218825 -w ibex-sun -t 2023-05-02T12:57:09

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.820950,+0.527405,+0.218825

which is R.A. +32.718 Decl. +12.640

missing R.A. +39.164 Decl. +15.325 (ibex-sun)

error is R.A. +6.446 Decl. +2.685

for a total 6.806 deg

There is no overlap with orbit 0604 commands.

Command Approval Checklist is attached.

Carol

Carol Weaver

University of New Hampshire

503-902-8492

From: Perry, Timothy E [US] (SP) <Timothy.Perry@ngc.com>
Date: Tuesday, April 4, 2023 at 14:47
To: Carol Weaver <carol.weaver@unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin@ngc.com>, David Heirtzler <David.Heirtzler@unh.edu>, IBEX FDG Group <ADS-IBEX@l3harris.com>, IBEXOPS <IBEXOPS@gmail.com>, ISOC <isocops@lists.sr.unh.edu>, Ken Fairchild <fair-play@comcast.net>, Ken Fairchild (kwfairchild@gmail.com) <kwfairchild@gmail.com>, Kenneth Fairchild <Ken.Fairchild@unh.edu>, angoldconsulting <angoldconsulting@earthlink.net>, Paul Janzen <Paul.Janzen@mso.umt.edu>, Perry, Timothy E [US] (SP) <Timothy.Perry@ngc.com>, Tyler, Ryan S [US] (SP) <Ryan.Tyler@ngc.com>, Wesley, Sheral R [US] (SP) <Sheral.Wesley@ngc.com>, Wynn, Reese [US] (SP) <Reese.Wynn@ngc.com>
Subject: IBEX Orbit #605 ATS Approval (18 – 28 Apr 2023)

CAUTION: This email originated from outside of the University System. Do not click links or open attachments unless you recognize the sender and know the content is safe.

All,

Attached are the planning files for Orbit #605. Please respond to this thread with comments and approvals.

Approvals are required by COB, 08 Apr 2023

Please note the following:

1. Battery Balancing this orbit

Begin 04/27/2023 23:00:00– End 04/28/2023 00:30:00

2. Command Load Constraint Violation Report (CCVR)

IBEX_2023_108_o0605a_v001.ccvr

# Input files: 1

# IBEX_2023_108_o0605a_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 2023/04/18 21:42:30 UTC

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

transition to science mode at 2023/04/22 21:21:34 UTC

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

OTHER MESSAGES

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

NO MESSAGES.