Hi all,
I have looked at the orbit 0535 ATS file, IBEX_2021_203_o0535a_v001.scr and I approve.
The constraint violations in IBEX_2021_203_o0535a_v001.ccvr are from the removal of the ACT_SetSpinPulseProtectEnable Enable commands. The violations are acceptable.
The PL commands in IBEX_2021_203_o0535a_v001.scr match those in the STF, IBEX_2021_203_o0535a_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_2021_203_o0535a_v001.oef and as verified with ibex_orbit.
There is 1 star tracker outage this orbit. Outage begins 9 hours after the perigee maneuver and lasts for ~4.5 hours.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit535_Contacts.txt for all contacts (3).
No Battery Balancing this orbit
The Inertial maneuver at perigee of orbit 0534 left us pointing in safe directions for the orbit 0535 arc A ascending and descending sequences:
ibex_rotate -o -u -0.457592,0.819336,0.345396 -w ibex-sun -t 2021/07:22:19:28:01
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.457592,+0.819336,+0.345396
which is R.A. +119.183 Decl. +20.206
missing R.A. +122.068 Decl. +20.151 (ibex-sun)
error is R.A. +2.885 Decl. +0.055
for a total 2.708 deg
ibex_rotate -o -u -0.457592,0.819336,0.345396 -w ibex-sun -t 2021/07:26:09:56:04
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.457592,+0.819336,+0.345396
which is R.A. +119.183 Decl. +20.206
missing R.A. +125.580 Decl. +19.427 (ibex-sun)
error is R.A. +6.397 Decl. +0.779
for a total 6.068 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 -0.521706,0.78666,0.330136 -w ibex-sun -t 2021/07:26:11:39:12
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.521706,+0.786660,+0.330136
which is R.A. +123.552 Decl. +19.277
missing R.A. +125.652 Decl. +19.412 (ibex-sun)
error is R.A. +2.100 Decl. +0.135
for a total 1.986 deg
ibex_rotate -o -u -0.521706,0.78666,0.330136 -w ibex-sun -t 2021/07:26:13:14:18
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.521706,+0.786660,+0.330136
which is R.A. +123.552 Decl. +19.277
missing R.A. +125.718 Decl. +19.398 (ibex-sun)
error is R.A. +2.166 Decl. +0.121
for a total 2.048 deg
ibex_rotate -o -u -0.521706,0.78666,0.330136 -w ibex-sun -t 2021/07:30:23:55:10
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.521706,+0.786660,+0.330136
which is R.A. +123.552 Decl. +19.277
missing R.A. +130.179 Decl. +18.339 (ibex-sun)
error is R.A. +6.627 Decl. +0.938
for a total 6.342 deg
The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 0536 apogee:
ibex_rotate -o -u -0.585175,0.747537,0.314258 -w ibex-sun -t 2021/07:31:03:20:57
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.585175,+0.747537,+0.314258
which is R.A. +128.054 Decl. +18.316
missing R.A. +130.313 Decl. +18.299 (ibex-sun)
error is R.A. +2.259 Decl. +0.017
for a total 2.145 deg
ibex_rotate -o -u -0.585175,0.747537,0.314258 -w ibex-sun -t 2021-08-04T23:13:24
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.585175,+0.747537,+0.314258
which is R.A. +128.054 Decl. +18.316
missing R.A. +134.878 Decl. +17.090 (ibex-sun)
error is R.A. +6.824 Decl. +1.226
for a total 6.615 deg
There is no overlap with orbit 0534 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: Thursday, 2021-July-8 at 10:47
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 #535 ATS Approval (22 - 31 July, 2021)
Caution - External Email
All,
Attached are the planning files for Orbit #535. Please respond to this thread with comments and approvals.
Approvals are required by COB on 11 July 2021
Please note the following:
- No Battery Balancing this orbit
-
Command Load Constraint Violation Report (CCVR)
IBEX_2021_203_o0535a_v001.ccvr
# Input files: 1
# IBEX_2021_203_o0535a_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 2021/07/22 16:55:55 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2021/07/26 12:44:18 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
