Hi all,

I approve IBEX_2020_323_o0508a_BUS_v001.scr, IBEX_2020_323_o0508a_INST_v001.scr

Constraint violations: IBEX_2020_323_o0508a_INST_v001.ccvr, IBEX_2020_323_o0508a_BUS_v001.ccvrhave the 2 expected violations from removal of ACT_SetSpinPulseProtectEnable

PL commands in IBEX_2020_323_o0508a_INST_v001.scr match those in IBEX_2020_323_o0508a_v002.stf

Star Tracker Outage: 1 outage that occurs after the 508 apogee maneuver and lasts for ~19 hours.

The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit508_Contacts.txt for the (3) contacts.

No battery cell balancing this orbit.

The inertial maneuver at perigee of 507 left us pointing in a safe direction for the orbit 508 arc A ascending and descending sequences:

ibex_rotate -o -u -0.58704,-0.739148,-0.330218 -w ibex-sun -t 2020/11:19:03:34:04

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.587040,-0.739148,-0.330218

which is R.A. +231.543 Decl. -19.282

missing R.A. +234.718 Decl. -19.509 (ibex-sun)

error is R.A. +3.175 Decl. +0.227

for a total 3.003 deg

ibex_rotate -o -u -0.58704,-0.739148,-0.330218 -w ibex-sun -t 2020/11:22:17:43:07

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.587040,-0.739148,-0.330218

which is R.A. +231.543 Decl. -19.282

missing R.A. +238.401 Decl. -20.263 (ibex-sun)

error is R.A. +6.858 Decl. +0.981

for a total 6.528 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 -0.520271,-0.779494,-0.348866 -w ibex-sun -t 2020/11:22:18:53:05

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.520271,-0.779494,-0.348866

which is R.A. +236.279 Decl. -20.418

missing R.A. +238.452 Decl. -20.272 (ibex-sun)

error is R.A. +2.173 Decl. +0.146

for a total 2.042 deg

ibex_rotate -o -u -0.520271,-0.779494,-0.348866 -w ibex-sun -t 2020/11:22:20:28:11

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.520271,-0.779494,-0.348866

which is R.A. +236.279 Decl. -20.418

missing R.A. +238.520 Decl. -20.284 (ibex-sun)

error is R.A. +2.241 Decl. +0.134

for a total 2.106 deg

ibex_rotate -o -u -0.520271,-0.779494,-0.348866 -w ibex-sun -t 2020/11:27:05:10:08

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.520271,-0.779494,-0.348866

which is R.A. +236.279 Decl. -20.418

missing R.A. +243.185 Decl. -21.133 (ibex-sun)

error is R.A. +6.906 Decl. +0.715

for a total 6.496 deg

The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 509 apogee:

ibex_rotate -o -u -0.452865,-0.814406,-0.362845 -w ibex-sun -t 2020/11:27:08:00:23

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.452865,-0.814406,-0.362845

which is R.A. +240.923 Decl. -21.275

missing R.A. +243.319 Decl. -21.160 (ibex-sun)

error is R.A. +2.396 Decl. +0.115

for a total 2.237 deg

ibex_rotate -o -u -0.452865,-0.814406,-0.362845 -w ibex-sun -t 2020-12-02T04:48:28

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

points axis +1.000000,+0.000000,+0.000000

towards ECI -0.452865,-0.814406,-0.362845

which is R.A. +240.923 Decl. -21.275

missing R.A. +248.513 Decl. -21.956 (ibex-sun)

error is R.A. +7.590 Decl. +0.681

for a total 7.088 deg

No overlapping commands at http://ibex.unh.edu/cgi-bin/ats.cgi.

Command Approval Checklist is attached.

Thanks,

Carol

Carol Weaver

University of New Hampshire

503.902.8492

From: Perry, Timothy E [US] (IS) <Timothy.Perry@ngc.com>
Date: Monday, 2020-November-2 at 11:29
To: Weaver, Carol <Carol.Weaver@unh.edu>, Chubin, Eric [US] (IS) <Eric.Chubin@ngc.com>, Heirtzler, David <David.Heirtzler@unh.edu>, IBEX FDG (IBEX@applieddefense.info) <IBEX@applieddefense.info>, IBEXOPS <IBEXOPS@gmail.com>, ISOC <isocops@lists.sr.unh.edu>, Ken Fairchild <fair-play@comcast.net>, Ken Fairchild (kwfairchild@gmail.com) <kwfairchild@gmail.com>, Nigel Angold <angoldconsulting@earthlink.net>, Paul Janzen <Paul.Janzen@mso.umt.edu>, Perry, Timothy E [US] (IS) <Timothy.Perry@ngc.com>, Tyler, Ryan S [US] (IS) <Ryan.Tyler@ngc.com>, Wesley, Sheral R [US] (IS) <Sheral.Wesley@ngc.com>, Wynn, Reese [US] (IS) <Reese.Wynn@ngc.com>
Subject: IBEX Orbit #508 ATS Approval (19 - 28 Nov 20)

Caution - External Email

All,

Attached are the planning files for Orbit #508

Please respond to this thread with comments and approvals.

Approvals are required by COB on 06 November 2020

>>>To reduce the number hand edits in an ATS. I am incorporating the use of an ABS file for inserting both battery balancing and 18 day timer reset commands. <<<

I generated 3 separate ATS files BUS, INST and a complete file. The BUS and INST will be the files to be uplinked. The complete ATS, I used as a sanity check to see how the commands lined up. Since we are in a new phase of ATS generation. IF you have any ideas of doing this differently, let me know.

The 3 ATS files have been changed to word files and encrypted. I will send out another email with the password. The files that have been transferred via MFT have not been encrypted and are still text files.

I moved the 2 House Keeping commands from the INST ATS to the BUS ATS. I commented out the 2 commands in the INST ATS. If for some reason we were unable to uplink the INST Commands for this orbit, we would have been in the wrong spacecraft state for executing the maneuver commands.

No Battery Balancing this orbit

# Orbit# 506 Reset Master Timer - 2020/11:09:23:15:00

Command Load Constraint Violation Report (CCVR)

IBEX_2020_323_o0508a_v001.ccvr

# Input files: 1

# IBEX_2020_323_o0508a_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 2020/11/19 01:11:12 UTC

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

transition to science mode at 2020/11/22 19:58:11 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