Hi all,
I have looked at the orbit 501 ATS files, IBEX_2020_259_o0501a_BUS_v001.scr and IBEX_2020_259_o0501a_INST_v001.scr and I approve.
The only constraint violations in IBEX_2020_259_o0501a_INST_v001.ccvr and IBEX_2020_259_o0501a_BUS_v001.ccvr are related to spin pulse protection (2) and are expected.
The PL commands in IBEX_2020_259_o0501a_INST_v001.scr match those in v002 STF, IBEX_2020_259_o0501a_v002.stf.
Ascending and descending command sequences are consistent with each other, 16 Re ascending, the apogee maneuver time and 16 Re descending as determined from the OEF, IBEX_2020_259_o0501a_BUS_v001.oef and as verified with ibex_orbit.
There are no star tracker outages.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file, IBEX_Orbit501_Contacts.txt for the (3) contacts in 501 and the additional one in 499.
The inertial precession maneuver at perigee of orbit 500 left us pointing in safe directions for the orbit 501 arc A ascending and descending sequences:
ibex_rotate -o -u -0.987191,0.149704,0.055159 -w ibex-sun -t 2020/09:16:07:38:52
Quaternion
+0.000000,+0.000000,+0.000000,+0.000000
points axis
+1.000000,+0.000000,+0.000000
towards ECI
-0.987191,+0.149704,+0.055159
which is
R.A. +171.377 Decl.
+3.162
missing
R.A. +174.151 Decl.
+2.508 (ibex-sun)
error is
R.A.
+2.774 Decl.
+0.654
for a total
2.847 deg
ibex_rotate -o -u -0.987191,0.149704,0.055159 -w ibex-sun -t 2020/09:20:00:49:44
Quaternion
+0.000000,+0.000000,+0.000000,+0.000000
points axis
+1.000000,+0.000000,+0.000000
towards ECI
-0.987191,+0.149704,+0.055159
which is
R.A. +171.377 Decl.
+3.162
missing
R.A. +177.381 Decl.
+1.141 (ibex-sun)
error is
R.A.
+6.004 Decl.
+2.021
for a total
6.331 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 -0.996566,0.079394,0.023507 -w ibex-sun -t 2020/09:20:01:59:42
Quaternion
+0.000000,+0.000000,+0.000000,+0.000000
points axis
+1.000000,+0.000000,+0.000000
towards ECI
-0.996566,+0.079394,+0.023507
which is
R.A. +175.445 Decl.
+1.347
missing
R.A. +177.425 Decl.
+1.122 (ibex-sun)
error is
R.A.
+1.980 Decl.
+0.225
for a total
1.993 deg
ibex_rotate -o -u -0.996566,0.079394,0.023507 -w ibex-sun -t 2020/09:20:03:34:48
Quaternion
+0.000000,+0.000000,+0.000000,+0.000000
points axis
+1.000000,+0.000000,+0.000000
towards ECI
-0.996566,+0.079394,+0.023507
which is
R.A. +175.445 Decl.
+1.347
missing
R.A. +177.485 Decl.
+1.098 (ibex-sun)
error is
R.A.
+2.040 Decl.
+0.249
for a total
2.055 deg
ibex_rotate -o -u -0.996566,0.079394,0.023507 -w ibex-sun -t 2020/09:24:15:04:14
Quaternion
+0.000000,+0.000000,+0.000000,+0.000000
points axis
+1.000000,+0.000000,+0.000000
towards ECI
-0.996566,+0.079394,+0.023507
which is
R.A. +175.445 Decl.
+1.347
missing
R.A. +181.632 Decl.
-0.691 (ibex-sun)
error is
R.A.
+6.187 Decl.
+2.038
for a total
6.514 deg
The inertial precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 502 apogee:
ibex_rotate -o -u -0.999951,0.007365,-0.006562 -w ibex-sun -t 2020/09:24:18:52:41
Quaternion
+0.000000,+0.000000,+0.000000,+0.000000
points axis
+1.000000,+0.000000,+0.000000
towards ECI
-0.999951,+0.007365,-0.006562
which is
R.A. +179.578 Decl.
-0.376
missing
R.A. +181.776 Decl.
-0.761 (ibex-sun)
error is
R.A.
+2.198 Decl.
+0.385
for a total
2.232 deg
ibex_rotate -o -u -0.999951,0.007365,-0.006562 -w ibex-sun -t 2020-09-29T15:13:47
Quaternion
+0.000000,+0.000000,+0.000000,+0.000000
points axis
+1.000000,+0.000000,+0.000000
towards ECI
-0.999951,+0.007365,-0.006562
which is
R.A. +179.578 Decl.
-0.376
missing
R.A. +186.017 Decl.
-2.589 (ibex-sun)
error is
R.A.
+6.439 Decl.
+2.213
for a total
6.806 deg
Lo is back in normal mode.
There is no overlap with Orbit 500 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Carol
--
Carol Weaver
University of New Hampshire
503.902.8492
From: "Perry, Timothy E [US] (IS)" <Timothy.Perry@ngc.com>
Date: Friday, 28 August 2020 at 13:22
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>, 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@umontana.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 #501 ATS Approval (16 - 25 Sept 2020)
Caution - External Email
All,
Attached are the planning files for Orbit #501
Please respond to this thread with comments and approvals.
Approvals are required by COB on 01 September 2020
Please note the following:
- 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.
- Battery Balancing this orbit
# Orbit 501 Battery Balancing
# 2020-09-25T01:33:05.257Z,Perigee,orbit:501
Begin - 2020/09:25:01:00:00 End - 2020/09:25:02:30:00
-
# Orbit# 499 Reset Master Timer - 2020/09:06:20:45:00
-
Command Load Constraint Violation Report (CCVR)
IBEX_2020_259_o0501a_v001.ccvr
==========================
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 2020/09/16 04:16:16 UTC
IBX-CLC-016: No command to enable spin pulse protection was found after
transition to science mode at 2020/09/20 03:04:48 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
