Hi all,

I have looked at the orbit 0559 ATS file, IBEX_2022_056_o0559a_v001.scr and I approve.

The constraint violations in IBEX_2022_056_o0559a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands and the two contacts on 2022-03-06 being close together. The violations are acceptable.

The PL commands in IBEX_2022_056_o0559a_v001.scr match those in the STF, IBEX_2022_056_o0559a_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_056_o0559a_v001.oef and as verified with ibex_orbit.

No star tracker outage this orbit.

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit559_Contacts.txt for all contacts (3).

Battery Balancing is 90 minutes long and more than 2 hours away from payload descending macros. It is ~52 minutes from the maneuver instead of 1 hour.

The Inertial maneuver at perigee of orbit 0558 left us pointing in safe directions for the orbit 0559 arc A ascending and descending sequences:

ibex_rotate -o -u .92426,-0.346137,-0.161035 -w ibex-sun -t 2022/02:25:16:45:40

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.924260,-0.346137,-0.161035

which is R.A. +339.469 Decl. -9.267

missing R.A. +338.472 Decl. -9.056 (ibex-sun)

error is R.A. +0.997 Decl. +0.211

for a total 1.006 deg

ibex_rotate -o -u .92426,-0.346137,-0.161035 -w ibex-sun -t 2022/03:01:11:31:28

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.924260,-0.346137,-0.161035

which is R.A. +339.469 Decl. -9.267

missing R.A. +342.147 Decl. -7.565 (ibex-sun)

error is R.A. +2.678 Decl. +1.702

for a total 3.149 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 0.952271,-0.2763,-0.129765 -w ibex-sun -t 2022/03:01:13:14:36

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.952271,-0.276300,-0.129765

which is R.A. +343.820 Decl. -7.456

missing R.A. +342.214 Decl. -7.537 (ibex-sun)

error is R.A. +1.606 Decl. +0.081

for a total 1.594 deg

ibex_rotate -o -u 0.952271,-0.2763,-0.129765 -w ibex-sun -t 2022/03:01:14:49:42

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.952271,-0.276300,-0.129765

which is R.A. +343.820 Decl. -7.456

missing R.A. +342.276 Decl. -7.511 (ibex-sun)

error is R.A. +1.544 Decl. +0.055

for a total 1.532 deg

ibex_rotate -o -u 0.952271,-0.2763,-0.129765 -w ibex-sun -t 2022/03:06:05:25:57

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

points axis +1.000000,+0.000000,+0.000000

towards ECI +0.952271,-0.276300,-0.129765

which is R.A. +343.820 Decl. -7.456

missing R.A. +346.445 Decl. -5.792 (ibex-sun)

error is R.A. +2.625 Decl. +1.664

for a total 3.093 deg

The Inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0560 apogee:

ibex_rotate -o -u 0.973273,-0.206485,-0.100518 -w ibex-sun -t 2022/03:06:11:08:51

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. +346.666 Decl. -5.710 (ibex-sun)

error is R.A. +1.356 Decl. +0.059

for a total 1.350 deg

ibex_rotate -o -u 0.973273,-0.206485,-0.100518 -w ibex-sun -t 2022-03-11T04:42:31

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. +351.167 Decl. -3.795 (ibex-sun)

error is R.A. +3.145 Decl. +1.974

for a total 3.703 deg

There is no overlap with orbit 0558 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: Friday, 2022-February-11 at 10:56
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 #559 ATS Approval (25 Feb – 06 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 #559. Please respond to this thread with comments and approvals.

Approvals are required by COB, 15 Feb 2022

Please note the following:

Battery Balancing this orbit

Begin 2022/03/06 12:00:00 – End 2022/03/06 13:30:00

Command Load Constraint Violation Report (CCVR)

IBEX_2022_056_o0559a_v001.ccvr

# Input files: 1

# IBEX_2022_056_o0559a_v001.scr

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

HARD CONSTRAINT VIOLATIONS

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

NO VIOLATIONS.

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

SOFT CONSTRAINT VIOLATIONS

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

The 2 IBX-CLC-006 violations are acceptable

IBX-CLC-006: Planned transmission at 2022/03/06 09:13:00 UTC - 2022/03/06

10:17:00 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 7680.000 seconds)

IBX-CLC-006: Planned transmission at 2022/03/06 13:58:00 UTC - 2022/03/06

15:02:00 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 7680.000 seconds)

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

transition to science mode at 2022/02/25 12:05:43 UTC

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

transition to science mode at 2022/03/01 14:19:42 UTC

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

OTHER MESSAGES

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

NO MESSAGES.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