(Changing email subject to Orbit 564 instead of 563)

Hi all,

I have looked at the orbit 0564 ATS file, IBEX_2022_102_o0564a_v001.scr and I approve.

The constraint violations in IBEX_2022_102_o0564a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.

The PL commands in IBEX_2022_102_o0564a_v001.scr match those in the STF, IBEX_2022_102_o0564a_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_102_o0564a_v001.oef and as verified with ibex_orbit.

There are 2 star tracker outages this orbit. The first begins about 2 days after apogee and lasts for about ~27 hours. The second is ~8 hours and ends ~1 hour before the perigee maneuver.

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit564_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 0563 left us pointing in safe directions for the orbit 0564 arc A ascending and descending sequences:

ibex_rotate -o -u 0.941418,0.312894,0.125818 -w ibex-sun -t 2022/04:12:14:05:40

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.941418,+0.312894,+0.125818

which is R.A. +18.385 Decl. +7.228

missing R.A. +20.641 Decl. +8.669 (ibex-sun)

error is R.A. +2.256 Decl. +1.441

for a total 2.659 deg

ibex_rotate -o -u 0.941418,0.312894,0.125818 -w ibex-sun -t 2022/04:16:06:03:50

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.941418,+0.312894,+0.125818

which is R.A. +18.385 Decl. +7.228

missing R.A. +24.117 Decl. +10.048 (ibex-sun)

error is R.A. +5.732 Decl. +2.820

for a total 6.329 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 0.91293,0.378316,0.153089 -w ibex-sun -t 2022/04:16:07:46:58

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.912930,+0.378316,+0.153089

which is R.A. +22.509 Decl. +8.806

missing R.A. +24.184 Decl. +10.075 (ibex-sun)

error is R.A. +1.675 Decl. +1.269

for a total 2.083 deg

ibex_rotate -o -u 0.91293,0.378316,0.153089 -w ibex-sun -t 2022/04:16:09:22:04

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.912930,+0.378316,+0.153089

which is R.A. +22.509 Decl. +8.806

missing R.A. +24.246 Decl. +10.100 (ibex-sun)

error is R.A. +1.737 Decl. +1.294

for a total 2.147 deg

ibex_rotate -o -u 0.91293,0.378316,0.153089 -w ibex-sun -t 2022/04:20:18:29:16

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.912930,+0.378316,+0.153089

which is R.A. +22.509 Decl. +8.806

missing R.A. +28.247 Decl. +11.610 (ibex-sun)

error is R.A. +5.738 Decl. +2.805

for a total 6.305 deg

The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0565 apogee:

ibex_rotate -o -u 0.878648,0.441587,0.181601 -w ibex-sun -t 2022/04:21:01:41:20

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.878648,+0.441587,+0.181601

which is R.A. +26.683 Decl. +10.463

missing R.A. +28.513 Decl. +11.694 (ibex-sun)

error is R.A. +1.830 Decl. +1.231

for a total 2.177 deg

ibex_rotate -o -u 0.878648,0.441587,0.181601 -w ibex-sun -t 2022-04-25T16:17:10

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.878648,+0.441587,+0.181601

which is R.A. +26.683 Decl. +10.463

missing R.A. +32.914 Decl. +13.265 (ibex-sun)

error is R.A. +6.231 Decl. +2.802

for a total 6.710 deg

There is no overlap with orbit 0563 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, 2022-March-29 at 14:19
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 #563 ATS Approval (12 – 21 Apr 2022)

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All,

Attached are the planning files for Orbit #564. Please respond to this thread with comments and approvals.

Approvals are required by COB, 01 April 2022

Please note the following:

Battery Balancing this orbit

Begin 2022/04/21 04:00:00– End 2022/04/21 05:30:00

2. Command Load Constraint Violation Report (CCVR)

IBEX_2022_102_o0564a_v001.ccvr

# Input files: 1

# IBEX_2022_102_o0564a_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 2022/04/12 11:10:38 UTC

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

transition to science mode at 2022/04/16 08:52:04 UTC

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

OTHER MESSAGES

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

NO MESSAGES.