[Isocops] IBEX ORbit# 409 ATS Approval (1 Jun 18 - 10 Jun 18) - v001 approval
Ken Fairchild
fair-play at comcast.net
Wed May 23 22:52:08 EDT 2018
All,
I have looked at the orbit 409 ATS,
IBEX_2018_152_o0409a_v001.scr,
and I approve.
The only constraint violations in
IBEX_2018_152_o0409a_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_152_o0409a_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_152_o0409a_v001.oef,
and as verified with ibex_orbit.
There is one star tracker outage. The outage starts about 5 1/2 hours before perigee and runs for about 5 hours. No despinning should be required due to this outage.
There is one moon in Lo FOV session in arc A. The ATS start time is almost 6 hours after that in the OEF and the ATS end time is about 2 1/2 hours after 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_Orbit409_Contacts.txt,
for the second and third contacts. The first contact commands do not appear in the ATS - this contact will only be used if a previous contact is lost due to LEOPS activity. If the first contact is required it will be a blind acq.
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 408 left us pointing in safe directions for the orbit 409 arc A ascending and descending sequences:
ibex_rotate -o -u 0.367989,0.856765,0.361299 -w ibex-sun -t 2018/06:01:21:16:37
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. +69.477 Decl. +22.075 (ibex-sun)
error is R.A. +2.721 Decl. +0.895
for a total 2.683 deg
ibex_rotate -o -u 0.367989,0.856765,0.361299 -w ibex-sun -t 2018/06:05:12:32:22
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. +73.300 Decl. +22.529 (ibex-sun)
error is R.A. +6.544 Decl. +1.349
for a total 6.221 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 0.296911,0.88017,0.37033 -w ibex-sun -t 2018/06:05:14:15:30
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.296911,+0.880170,+0.370330
which is R.A. +71.359 Decl. +21.736
missing R.A. +73.375 Decl. +22.538 (ibex-sun)
error is R.A. +2.016 Decl. +0.802
for a total 2.032 deg
ibex_rotate -o -u 0.296911,0.88017,0.37033 -w ibex-sun -t 2018/06:05:15:50:36
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.296911,+0.880170,+0.370330
which is R.A. +71.359 Decl. +21.736
missing R.A. +73.444 Decl. +22.546 (ibex-sun)
error is R.A. +2.085 Decl. +0.810
for a total 2.094 deg
ibex_rotate -o -u 0.296911,0.88017,0.37033 -w ibex-sun -t 2018/06:10:03:17:29
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.296911,+0.880170,+0.370330
which is R.A. +71.359 Decl. +21.736
missing R.A. +78.026 Decl. +23.004 (ibex-sun)
error is R.A. +6.667 Decl. +1.268
for a total 6.293 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 410 apogee:
ibex_rotate -o -u 0.221459,0.898369,0.379327 -w ibex-sun -t 2018/06:10:05:55:20
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.221459,+0.898369,+0.379327
which is R.A. +76.152 Decl. +22.292
missing R.A. +78.131 Decl. +23.009 (ibex-sun)
error is R.A. +1.979 Decl. +0.717
for a total 1.962 deg
ibex_rotate -o -u 0.221459,0.898369,0.379327 -w ibex-sun -t 2018-06-15T07:51:21.276Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.221459,+0.898369,+0.379327
which is R.A. +76.152 Decl. +22.292
missing R.A. +83.442 Decl. +23.287 (ibex-sun)
error is R.A. +7.290 Decl. +0.995
for a total 6.793 deg
No Lo O-mode.
There is no overlap with orbit 408 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
> On May 20, 2018 at 7:42 PM "Wesley, Sheral" <Sheral.Wesley at OrbitalATK.com> wrote:
>
>
> Guys,
>
> Here are the planning products and ATS for Orbit# 409.
>
> Please respond to this email thread with you comments and approvals
>
> Approvals are required before 22 May 18 @1800 UTC.
>
> Note the following
>
> 1. PERIGEE Battery Balancing
>
> # Orbit# 409 PERIGEE Battery Balancing
>
> # 2018-06-10T14:31:13.442Z,Perigee,orbit:409
>
> SetLongEclipseFlag TRUE $TIME=2018/06:10:13:00:00
>
> SetLongEclipseFlag FALSE $TIME=2018/06:10:14:30:00
>
>
>
> 2. Moon in Lo FOV Commands
>
> 2018-06-03T05:34:17.795Z,MoonInLoFovStart,orbit:409
>
> 2018-06-03T23:21:12.878Z,MoonInLoFovStop,orbit:409
>
>
>
> 3. Command Load Constraint Violation Report
>
> IBEX_2018_152_o0409a_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 2018/06/01 19:31:43 UTC
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2018/06/05 15:20:36 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/20180523/6551a38f/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/20180523/6551a38f/image001-0001.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev16b_o0409_KWF.doc
Type: application/msword
Size: 121344 bytes
Desc: not available
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20180523/6551a38f/IBEX-Command-Approval-Checklist-Rev16b_o0409_KWF-0001.doc>
More information about the Isocops
mailing list