[Isocops] IBEX Orbit# 411 ATS Approval (20 Jun 18 - 29 Jun 18) - v002 approval
Ken Fairchild
fair-play at comcast.net
Sun Jun 10 07:13:19 EDT 2018
All,
I have looked at the orbit 411 ATS,
IBEX_2018_171_o0411a_v002.scr,
and I approve.
The only constraint violations in
IBEX_2018_171_o0411a_v001_.ccvr
are from a long contact and 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_171_o0411a_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_171_o0411a_v001.oef,
and as verified with ibex_orbit.
There are two star tracker outages; they overlap. The first starts 15 1/2 hours before 15 Re descending and runs for 1+ days. The second outage ends about 20 minutes after the first one ends. Some despinning may be required due to the first outage.
There are two moon in Lo FOV sessions in the ATS; there is only one in the OEF. The first session is in arc A; the second starts in arc A and ends in arc B. The ATS start time for the first session is the same as that in the OEF and the end time of the second session is about 4 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_Orbit411_Contacts.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 410 left us pointing in safe directions for the orbit 411 arc A ascending and descending sequences:
ibex_rotate -o -u 0.066062,0.919133,0.388368 -w ibex-sun -t 2018/06:20:12:06:42
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.066062,+0.919133,+0.388368
which is R.A. +85.889 Decl. +22.853
missing R.A. +88.741 Decl. +23.411 (ibex-sun)
error is R.A. +2.852 Decl. +0.558
for a total 2.681 deg
ibex_rotate -o -u 0.066062,0.919133,0.388368 -w ibex-sun -t 2018/06:24:04:19:25
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI +0.066062,+0.919133,+0.388368
which is R.A. +85.889 Decl. +22.853
missing R.A. +92.620 Decl. +23.396 (ibex-sun)
error is R.A. +6.731 Decl. +0.544
for a total 6.213 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 -0.009425,0.921504,0.388256 -w ibex-sun -t 2018/06:24:06:02:33
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.009425,+0.921503,+0.388256
which is R.A. +90.586 Decl. +22.846
missing R.A. +92.696 Decl. +23.396 (ibex-sun)
error is R.A. +2.110 Decl. +0.550
for a total 2.017 deg
ibex_rotate -o -u -0.009425,0.921504,0.388256 -w ibex-sun -t 2018/06:24:07:37:39
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.009425,+0.921503,+0.388256
which is R.A. +90.586 Decl. +22.846
missing R.A. +92.766 Decl. +23.396 (ibex-sun)
error is R.A. +2.180 Decl. +0.550
for a total 2.079 deg
ibex_rotate -o -u -0.009425,0.921504,0.388256 -w ibex-sun -t 2018/06:28:18:34:55
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.009425,+0.921503,+0.388256
which is R.A. +90.586 Decl. +22.846
missing R.A. +97.395 Decl. +23.287 (ibex-sun)
error is R.A. +6.809 Decl. +0.441
for a total 6.279 deg
The inertial maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 412 apogee:
ibex_rotate -o -u -0.087068,0.917661,0.387709 -w ibex-sun -t 2018/06:29:11:30:46
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.087068,+0.917661,+0.387709
which is R.A. +95.420 Decl. +22.812
missing R.A. +98.073 Decl. +23.219 (ibex-sun)
error is R.A. +2.653 Decl. +0.407
for a total 2.475 deg
ibex_rotate -o -u -0.087068,0.917661,0.387709 -w ibex-sun -t 2018-07-03T20:29:02.780Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.087068,+0.917661,+0.387709
which is R.A. +95.420 Decl. +22.812
missing R.A. +102.630 Decl. +22.918 (ibex-sun)
error is R.A. +7.210 Decl. +0.106
for a total 6.644 deg
No Lo O-mode.
There is no overlap with orbit 410 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
> On June 7, 2018 at 1:41 PM "Wesley, Sheral" <Sheral.Wesley at OrbitalATK.com> wrote:
>
>
> Guys,
>
> Here are the planning files and ATS for Orbit# 411.
>
> Please respond to this email thread with your comments and approvals
>
> Approvals are required before 9 Jun 18 @1300 UTC
>
>
>
> Note the following:
>
> 1. We are now Northrup Grumman!!!!!!!
>
> Our new email accounts with be firstname.lastname at ngc.com mailto:firstname.lastname at ngc.com
>
> The old orbitalatk email addresses will remain in effect for up to a year
>
>
>
> 2. Moon in Lo FOV Commands
>
> # 2018-06-20T13:49:58.504Z,MoonInLoFovStart,orbit:411
>
> # 2018-06-24T19:58:59.420Z,MoonInLoFovStop,orbit:411
>
>
>
> 3. PERIGEE Battery Balancing
>
> # Orbit# 411 PERIGEE Battery Balancing
>
> # 2018-06-29T06:05:44.540Z,Perigee,orbit:411
>
> SetLongEclipseFlag TRUE $TIME=2018/06:29:06:00:00
>
> SetLongEclipseFlag FALSE $TIME=2018/06:29:07:30:00
>
>
>
> 4. Command Load Constraint Violation Report
>
> IBEX_2018_171_o0411a_v001.scr
>
>
>
> ==========================
>
> HARD CONSTRAINT VIOLATIONS
>
> ==========================
>
> NO VIOLATIONS.
>
>
>
> ==========================
>
> SOFT CONSTRAINT VIOLATIONS
>
> ==========================
>
> IBX-CLC-006: Planned transmission at 2018/06/20 12:43:00 UTC - 2018/06/20
>
> 14:17:00 UTC exceeds the maximum contiguous transmission time of
>
> 5400 seconds
>
> **IBEX,USAK01,ADD,06/29/18,180,18:30:00,06/29/18,180,20:00:00,,LAHO 40K IBEX-2 Hi-Background/Magneto Tail Table Uploads * *
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2018/06/20 10:18:15 UTC
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2018/06/24 07:07:39 UTC
>
>
>
> ==============
>
> OTHER MESSAGES
>
> ==============
>
> NO MESSAGES.
>
>
>
>
>
> Sheral R. Wesley
>
> Sr Systems Engineer
>
> IBEX , OCO2 Mission OPS
>
> CRS/CYGNUS Mission Planning
>
> Northrop Grumman Innovation Systems
>
> Bldg. 2 Room 1337
>
> Office (703) 406-5641
>
> Cell (202) 236-0802
>
>
>
>
>
>
>
> ---------------------------------------------
> 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/20180610/50d825db/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev16d-o0411_KWF.doc
Type: application/msword
Size: 121344 bytes
Desc: not available
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20180610/50d825db/IBEX-Command-Approval-Checklist-Rev16d-o0411_KWF-0001.doc>
More information about the Isocops
mailing list