[Isocops] IBEX Orbit# 407 ATS Approval (13 May 18 - 23 May 18) - v002 approval
Ken Fairchild
fair-play at comcast.net
Fri May 4 20:46:58 EDT 2018
All,
I have looked at the orbit 407 ATS,
IBEX_2018_133_o0407a_v002.scr,
and I approve.
The only constraint violations in
IBEX_2018_133_o0407a_v002_.ccvr
are from the removal of the
ACT_SetSpinPulseProtectEnable Enable
commands (2); the violations are expected.
The PL commands in the v002 ATS match those in the v002 STF,
IBEX_2018_133_o0407a_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_2018_133_o0407a_v001.oef,
and as verified with ibex_orbit.
There are no star tracker outages.
There is one moon in Lo FOV session in arc B. The ATS start time is 1 1/2 hours after that in the OEF and the ATS end time is 2 1/2 hours before that in the OEF. These differences are not unusual.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit407_Contacts_v002.txt,
for all contacts (3).
No battery cell balancing this orbit; we'll do it again in the next orbit.
The inertial maneuver at perigee of orbit 406 left us pointing in safe directions for the orbit 407 arc A ascending and descending sequences:
ibex_rotate -o -u 0.634157,0.713064,0.298974 -w ibex-sun -t 2018/05:14:09:46:08
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.634157,+0.713064,+0.298974
which is R.A. +48.352 Decl. +17.396
missing R.A. +50.892 Decl. +18.571 (ibex-sun)
error is R.A. +2.540 Decl. +1.175
for a total 2.687 deg
ibex_rotate -o -u 0.634157,0.713064,0.298974 -w ibex-sun -t 2018/05:18:03:23:11
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.634157,+0.713064,+0.298974
which is R.A. +48.352 Decl. +17.396
missing R.A. +54.703 Decl. +19.463 (ibex-sun)
error is R.A. +6.351 Decl. +2.067
for a total 6.369 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 0.572249,0.756457,0.316709 -w ibex-sun -t 2018/05:18:05:06:19
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.572249,+0.756457,+0.316709
which is R.A. +52.893 Decl. +18.464
missing R.A. +54.775 Decl. +19.480 (ibex-sun)
error is R.A. +1.882 Decl. +1.016
for a total 2.049 deg
ibex_rotate -o -u 0.572249,0.756457,0.316709 -w ibex-sun -t 2018/05:18:06:41:25
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.572249,+0.756457,+0.316709
which is R.A. +52.893 Decl. +18.464
missing R.A. +54.841 Decl. +19.495 (ibex-sun)
error is R.A. +1.948 Decl. +1.031
for a total 2.112 deg
ibex_rotate -o -u 0.572249,0.756457,0.316709 -w ibex-sun -t 2018/05:22:19:20:57
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.572249,+0.756457,+0.316709
which is R.A. +52.893 Decl. +18.464
missing R.A. +59.287 Decl. +20.465 (ibex-sun)
error is R.A. +6.394 Decl. +2.001
for a total 6.351 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 408 apogee:
ibex_rotate -o -u 0.505458,0.795307,0.334662 -w ibex-sun -t 2018/05:22:21:55:42
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.505458,+0.795307,+0.334662
which is R.A. +57.562 Decl. +19.552
missing R.A. +59.388 Decl. +20.481 (ibex-sun)
error is R.A. +1.826 Decl. +0.929
for a total 1.951 deg
ibex_rotate -o -u 0.505458,0.795307,0.334662 -w ibex-sun -t 2018-05-27T20:34:35.635Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.505458,+0.795307,+0.334662
which is R.A. +57.562 Decl. +19.552
missing R.A. +64.461 Decl. +21.349 (ibex-sun)
error is R.A. +6.899 Decl. +1.797
for a total 6.708 deg
No Lo O-mode.
There is no overlap with orbit 406 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
> On May 1, 2018 at 1:57 PM "Wesley, Sheral" <Sheral.Wesley at OrbitalATK.com> wrote:
>
>
> Guys,
>
> Here are the planning files and ATS for Orbit# 407. Please respond to this email thread with your comments and approvals.
>
> Approvals are required before 3 May 18 @1800 UTC.
>
>
>
> Note the following :
>
> 1. Moon in Lo FOV Commands
>
> # 2018-05-21T03:10:06.966Z,MoonInLoFovStart,orbit:407
>
> # 2018-05-22T01:44:50.727Z,MoonInLoFovStop,orbit:407
>
>
>
> 2. No Battery Balancing
>
> 3. Command Load Constraint Violation Report
>
> IBEX_2018_133_o0407a_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 2018/05/14 07:52:23 UTC
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2018/05/18 06:11:25 UTC
>
>
>
> ==============
>
> OTHER MESSAGES
>
> ==============
>
> NO MESSAGES.
>
>
>
>
>
>
>
> Sheral R. Wesley
>
> Sr Systems Engineer
>
> IBEX , OCO2 Mission OPS
>
> CRS/CYGNUS Mission Planning
>
> Bldg. 2 Room 1337
>
> Office (703) 406-5641
>
> Cell (202) 236-0802
>
> [cid:image001.jpg at 01D04F6C.5A1C97F0]
>
>
>
>
>
> ---------------------------------------------
> Notice: This e-mail is intended solely for use of the individual or entity to which it is addressed and may contain information that is proprietary, privileged and/or exempt from disclosure under applicable law. If the reader is not the intended recipient or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. This communication may also contain data subject to U.S. export laws. If so, data subject to the International Traffic in Arms Regulation cannot be disseminated, distributed, transferred, or copied, whether incorporated or in its original form, to foreign nationals residing in the U.S. or abroad, absent the express prior approval of the U.S. Department of State. Data subject to the Export Administration Act may not be disseminated, distributed, transferred or copied contrary to U. S. Department of Commerce regulations. If you have received this communication in error, please notify the sender by reply e-mail and destroy the e-mail message and any physical copies made of the communication.
> Thank you.
> *********************
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20180504/4600c77c/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 2392 bytes
Desc: not available
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20180504/4600c77c/image001-0001.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev16b-o0407_KWF.doc
Type: application/msword
Size: 121344 bytes
Desc: not available
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20180504/4600c77c/IBEX-Command-Approval-Checklist-Rev16b-o0407_KWF-0001.doc>
More information about the Isocops
mailing list