Hi all,

I have looked at the orbit 0578 ATS file, IBEX_2022_227_o0578a_v001.scr and I approve.

The constraint violations in IBEX_2022_227_o0578a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.

The PL commands in IBEX_2022_227_o0578a_v001.scr match those in the STF, IBEX_2022_227_o0578a_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_2022_227_o0578a_v001.oef and as verified with ibex_orbit.

No star tracker outages this orbit.

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit578_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 Inertial maneuver at perigee of orbit 0577 left us pointing in safe directions for the orbit 0578 arc A ascending and descending sequences:

ibex_rotate -o -u -0.769676,0.589292,0.245629 -w ibex-sun -t 2022/08:16:04:47:23

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.769676,+0.589292,+0.245629

which is R.A. +142.561 Decl. +14.219

missing R.A. +145.366 Decl. +13.822 (ibex-sun)

error is R.A. +2.805 Decl. +0.397

for a total 2.750 deg

ibex_rotate -o -u -0.769676,0.589292,0.245629 -w ibex-sun -t 2022/08:20:00:19:57

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.769676,+0.589292,+0.245629

which is R.A. +142.561 Decl. +14.219

missing R.A. +148.812 Decl. +12.660 (ibex-sun)

error is R.A. +6.251 Decl. +1.559

for a total 6.276 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 -0.816774,0.533241,0.220306 -w ibex-sun -t 2022/08:20:02:03:05

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.816774,+0.533241,+0.220306

which is R.A. +146.861 Decl. +12.727

missing R.A. +148.879 Decl. +12.637 (ibex-sun)

error is R.A. +2.018 Decl. +0.090

for a total 1.971 deg

ibex_rotate -o -u -0.816774,0.533241,0.220306 -w ibex-sun -t 2022/08:20:03:38:11

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.816774,+0.533241,+0.220306

which is R.A. +146.861 Decl. +12.727

missing R.A. +148.941 Decl. +12.617 (ibex-sun)

error is R.A. +2.080 Decl. +0.110

for a total 2.032 deg

ibex_rotate -o -u -0.816774,0.533241,0.220306 -w ibex-sun -t 2022/08:24:19:12:40

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.816774,+0.533241,+0.220306

which is R.A. +146.861 Decl. +12.727

missing R.A. +153.362 Decl. +11.010 (ibex-sun)

error is R.A. +6.501 Decl. +1.717

for a total 6.589 deg

The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0579 apogee:

ibex_rotate -o -u -0.859636,0.472257,0.194936 -w ibex-sun -t 2022/08:24:23:21:06

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.859636,+0.472257,+0.194936

which is R.A. +151.217 Decl. +11.241

missing R.A. +153.519 Decl. +10.944 (ibex-sun)

error is R.A. +2.302 Decl. +0.297

for a total 2.279 deg

ibex_rotate -o -u -0.859636,0.472257,0.194936 -w ibex-sun -t 2022-08-29T17:32:07

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.859636,+0.472257,+0.194936

which is R.A. +151.217 Decl. +11.241

missing R.A. +157.741 Decl. +9.340 (ibex-sun)

error is R.A. +6.524 Decl. +1.901

for a total 6.695 deg

There is no overlap with orbit 0577 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: Wednesday, 2022-August-3 at 12:29
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>, Nigel Angold <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 #578 ATS Appoval (15 – 25 Aug 2022)

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 #578. Please respond to this thread with comments and approvals.

Approvals are required by COB, 05 Aug 2022

Please note the following:

No Battery Balancing this orbit

Begin 2022/08/25 03:00:00– End 2022/08/25 04:30:00

Command Load Constraint Violation Report (CCVR)

IBEX_2022_227_o0578a_v001.ccvr

# Input files: 1

# IBEX_2022_227_o0578a_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 2022/08/16 01:29:02 UTC

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

transition to science mode at 2022/08/20 03:08:11 UTC

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

OTHER MESSAGES

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

NO MESSAGES