Hi all,

The angle at Orbit 561 apogee after the perigee sun maneuver is 4.736 deg.

I have looked at the orbit 0560 ATS file, IBEX_2022_065_o0560a_v001.scr and I approve.

The constraint violations in IBEX_2022_065_o0560a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.

The PL commands in IBEX_2022_065_o0560a_v001.scr match those in the STF, IBEX_2022_065_o0560a_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_065_o0560a_v001.oef and as verified with ibex_orbit.

There is 1 star tracker outages this orbit around the perigee maneuver that lasts for about 10 hours.

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit560_Contacts.txt for all contacts (2).

Battery Balancing is 90 minutes long and more than 2 hours away from payload descending macros. It is ~30 minutes from the maneuver instead of 1 hour, but based on guidance from Ryan Tyler, the balancing needs to only be at least 15 minutes from a maneuver so this is acceptable.

The Inertial maneuver at perigee of orbit 0559 left us pointing in safe directions for the orbit 0560 arc A ascending and descending sequences:

ibex_rotate -o -u 0.973273,-0.206485,-0.100518 -w ibex-sun -t 2022/03:06:20:12:29

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.973273,-0.206485,-0.100518

which is R.A. +348.022 Decl. -5.769

missing R.A. +347.030 Decl. -5.574 (ibex-sun)

error is R.A. +0.992 Decl. +0.195

for a total 1.006 deg

ibex_rotate -o -u 0.973273,-0.206485,-0.100518 -w ibex-sun -t 2022/03:10:17:09:25

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.973273,-0.206485,-0.100518

which is R.A. +348.022 Decl. -5.769

missing R.A. +350.725 Decl. -3.991 (ibex-sun)

error is R.A. +2.703 Decl. +1.778

for a total 3.227 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 0.988928,-0.13225,-0.067319 -w ibex-sun -t 2022/03:10:18:52:33

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.988928,-0.132250,-0.067319

which is R.A. +352.383 Decl. -3.860

missing R.A. +350.791 Decl. -3.962 (ibex-sun)

error is R.A. +1.592 Decl. +0.102

for a total 1.592 deg

ibex_rotate -o -u 0.988928,-0.13225,-0.067319 -w ibex-sun -t 2022/03:10:20:27:39

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.988928,-0.132250,-0.067319

which is R.A. +352.383 Decl. -3.860

missing R.A. +350.852 Decl. -3.935 (ibex-sun)

error is R.A. +1.531 Decl. +0.075

for a total 1.530 deg

ibex_rotate -o -u 0.988928,-0.13225,-0.067319 -w ibex-sun -t 2022/03:15:13:18:14

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.988928,-0.132250,-0.067319

which is R.A. +352.383 Decl. -3.860

missing R.A. +355.042 Decl. -2.137 (ibex-sun)

error is R.A. +2.659 Decl. +1.723

for a total 3.165 deg

The Sun precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0561 apogee:

ibex_rotate -o -r +355.278 -d -2.047 -w ibex-sun -t 2022/03:15:19:31:45

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.995970,-0.082269,-0.035719

which is R.A. +355.278 Decl. -2.047

missing R.A. +355.278 Decl. -2.047 (ibex-sun)

error is R.A. +0.000 Decl. +0.000

for a total 0.000 deg

ibex_rotate -o -r +355.278 -d -2.047 -w ibex-sun -t 2022-03-20T10:25:43

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.995970,-0.082269,-0.035719

which is R.A. +355.278 Decl. -2.047

missing R.A. +359.620 Decl. -0.152 (ibex-sun)

error is R.A. +4.342 Decl. +1.895

for a total 4.736 deg

There is no overlap with orbit 0559 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: Monday, 2022-February-21 at 11:53
To: Carol Weaver <carol.weaver@unh.edu>, Chubin, Eric [US] (SP) <Eric.Chubin@ngc.com>, David Heirtzler <David.Heirtzler@unh.edu>, ADS-IBEX@l3harris.com <ADS-IBEX@l3harris.com>, IBEXOPS@gmail.com <IBEXOPS@gmail.com>, isocops@lists.sr.unh.edu <isocops@lists.sr.unh.edu>, fair-play@comcast.net <fair-play@comcast.net>, kwfairchild@gmail.com <kwfairchild@gmail.com>, Kenneth Fairchild <Ken.Fairchild@unh.edu>, angoldconsulting@earthlink.net <angoldconsulting@earthlink.net>, Paul.Janzen@mso.umt.edu <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 #560 ATS Approval (06 - 16 Mar 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 #560. Please respond to this thread with comments and approvals.

Approvals are required by COB, 24 Feb 2022

Please note the following:

Perigee Sun Maneuver - 2022/03/15 19:16:45

Battery Balancing this orbit

Begin 2022/03/15 20:00:00– End 2022/03/15 21:30:00

Command Load Constraint Violation Report (CCVR)

IBEX_2022_065_o0560a_v001.ccvr

# Input files: 1

# IBEX_2022_065_o0560a_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 2022/03/06 15:14:18 UTC

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

transition to science mode at 2022/03/10 19:57:39 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