[Isocops] IBEX ORbit# 408 ATS Approval (23 MAy 18 - 1 Jun 18) - v001 approval
Ken Fairchild
fair-play at comcast.net
Sat May 12 18:12:30 EDT 2018
All,
I have looked at the orbit 408 ATS,
IBEX_2018_143_o0408a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2018_143_o0408a_v001_.ccvr
are from the removal of the
ACT_SetSpinPulseProtectEnable Enable
commands (2); the violations are expected.
The PL commands in the v001 ATS match those in the v002 STF,
IBEX_2018_143_o0408a_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_143_o0408a_v001.oef,
and as verified with ibex_orbit.
There are two star tracker outages. The first starts 1 1/2- days before 15 Re descending and runs for 1+ days. The second starts 5+ hours before perigee and runs for 3 hours. Some despinning may be required due to the first outage.
There are no moon in Lo FOV sessions.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit408_Contacts_v001.txt,
for all contacts (3).
We are doing battery cell balancing this orbit and the balancing commands are correct and offset by enough time from other commands.
The inertial maneuver at perigee of orbit 407 left us pointing in safe directions for the orbit 408 arc A ascending and descending sequences:
ibex_rotate -o -u 0.505458,0.795307,0.334662 -w ibex-sun -t 2018/05:23:17:51:22
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. +60.195 Decl. +20.593 (ibex-sun)
error is R.A. +2.633 Decl. +1.041
for a total 2.683 deg
ibex_rotate -o -u 0.505458,0.795307,0.334662 -w ibex-sun -t 2018/05:27:09:03:33
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. +63.967 Decl. +21.261 (ibex-sun)
error is R.A. +6.405 Decl. +1.709
for a total 6.241 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 0.438855,0.828468,0.347918 -w ibex-sun -t 2018/05:27:10:46:41
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.438855,+0.828468,+0.347918
which is R.A. +62.089 Decl. +20.360
missing R.A. +64.041 Decl. +21.275 (ibex-sun)
error is R.A. +1.952 Decl. +0.914
for a total 2.041 deg
ibex_rotate -o -u 0.438855,0.828468,0.347918 -w ibex-sun -t 2018/05:27:12:21:47
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.438855,+0.828468,+0.347918
which is R.A. +62.089 Decl. +20.360
missing R.A. +64.109 Decl. +21.287 (ibex-sun)
error is R.A. +2.020 Decl. +0.927
for a total 2.103 deg
ibex_rotate -o -u 0.438855,0.828468,0.347918 -w ibex-sun -t 2018/05:31:22:26:45
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.438855,+0.828468,+0.347918
which is R.A. +62.089 Decl. +20.360
missing R.A. +68.550 Decl. +21.997 (ibex-sun)
error is R.A. +6.461 Decl. +1.637
for a total 6.242 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 409 apogee:
ibex_rotate -o -u 0.367989,0.856765,0.361299 -w ibex-sun -t 2018/06:01:00:56:13
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.367989,+0.856765,+0.361299
which is R.A. +66.756 Decl. +21.180
missing R.A. +68.648 Decl. +22.008 (ibex-sun)
error is R.A. +1.892 Decl. +0.828
for a total 1.944 deg
ibex_rotate -o -u 0.367989,0.856765,0.361299 -w ibex-sun -t 2018-06-06T00:03:47.270Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.367989,+0.856765,+0.361299
which is R.A. +66.756 Decl. +21.180
missing R.A. +73.802 Decl. +22.588 (ibex-sun)
error is R.A. +7.046 Decl. +1.408
for a total 6.688 deg
No Lo O-mode.
There is no overlap with orbit 407 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
> On May 10, 2018 at 1:57 PM "Wesley, Sheral" <Sheral.Wesley at OrbitalATK.com> wrote:
>
>
> Guys,
>
> Here are the planning files and ATS for Orbit# 408.
>
> Please respond to this email thread with your comments and approvals.
>
> Approvals are required before 13 May 18 @0100 UTC
>
>
>
> Note the following :
>
> 1. Battery Balancing at Perigee
>
> # Orbit# 408 PERIGEE Battery Balancing
>
> # 2018-06-01T09:54:20.132Z,Perigee,orbit:408
>
> SetLongEclipseFlag TRUE $TIME=2018/06:01:09:00:00
>
> SetLongEclipseFlag FALSE $TIME=2018/06:01:10:30:00
>
>
>
> 2. Command Load Constraint Violation Report
>
> IBEX_2018_143_o0408a_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 2018/05/23 16:01:26 UTC
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2018/05/27 11:51:47 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/20180512/bc81370d/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev16b-o0408_KWF.doc
Type: application/msword
Size: 121344 bytes
Desc: not available
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20180512/bc81370d/IBEX-Command-Approval-Checklist-Rev16b-o0408_KWF-0001.doc>
More information about the Isocops
mailing list