[Isocops] IBEX Orbit #460 ATS Approval ( 8 - 17 Sept 2019 ) Ver 2 - v002 approval
KEN FAIRCHILD
fair-play at comcast.net
Thu Sep 5 23:47:18 EDT 2019
All,
Note: Angle at orbit 461 apogee after the perigee sun precession maneuver: 4.585 deg
I have looked at the orbit 460 ATS,
IBEX_2019_251_o0460a_v002.scr,
and I approve.
The only constraint violations in
IBEX_2019_251_o0460a_v002.ccvr
are from the removal of the
ACT_SetSpinPulseProtectEnable Enable
commands (2) and the proximity of the perigee contacts; the violations are expected.
The PL commands in the v002 ATS match those in the v004 STF,
IBEX_2019_251_o0460a_v004.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_2019_251_o0460a_v004.oef,
and as verified with ibex_orbit.
There are two star tracker outages. The first starts 1 day after 15 Re ascending and runs for 1+ days. The second starts 3 hours after 15 Re descending and runs for 8 hours. Some despinning may be required due to the first outage.
The ground station command sequences are correct and the timing and bit rates match those in the contacts file,
IBEX_Orbit460_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 precession maneuver at perigee of orbit 459 left us pointing in safe directions for the orbit 460 arc A ascending and descending sequences:
ibex_rotate -o -u -0.954056,0.278371,0.110845 -w ibex-sun -t 2019/09:08:14:17:56
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.954056,+0.278371,+0.110845
which is R.A. +163.734 Decl. +6.364
missing R.A. +166.533 Decl. +5.740 (ibex-sun)
error is R.A. +2.799 Decl. +0.624
for a total 2.853 deg
ibex_rotate -o -u -0.954056,0.278371,0.110845 -w ibex-sun -t 2019/09:12:02:28:19
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.954056,+0.278371,+0.110845
which is R.A. +163.734 Decl. +6.364
missing R.A. +169.602 Decl. +4.472 (ibex-sun)
error is R.A. +5.868 Decl. +1.892
for a total 6.140 deg
The inertial 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 -0.973738,0.212701,0.081191 -w ibex-sun -t 2019/09:12:04:11:27
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.973738,+0.212701,+0.081191
which is R.A. +167.678 Decl. +4.657
missing R.A. +169.667 Decl. +4.446 (ibex-sun)
error is R.A. +1.989 Decl. +0.211
for a total 1.994 deg
ibex_rotate -o -u -0.973738,0.212701,0.081191 -w ibex-sun -t 2019/09:12:05:46:33
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.973738,+0.212701,+0.081191
which is R.A. +167.678 Decl. +4.657
missing R.A. +169.727 Decl. +4.421 (ibex-sun)
error is R.A. +2.049 Decl. +0.236
for a total 2.056 deg
ibex_rotate -o -u -0.973738,0.212701,0.081191 -w ibex-sun -t 2019/09:16:15:33:25
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.973738,+0.212701,+0.081191
which is R.A. +167.678 Decl. +4.657
missing R.A. +173.803 Decl. +2.700 (ibex-sun)
error is R.A. +6.125 Decl. +1.957
for a total 6.418 deg
The sun precession maneuver at perigee leaves us pointing in safe directions at the time of the maneuver and at orbit 461 apogee:
ibex_rotate -o -r +173.921 -d +2.643 -w ibex-sun -t 2019/09:16:18:42:36
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.993319,+0.105787,+0.046113
which is R.A. +173.921 Decl. +2.643
missing R.A. +173.921 Decl. +2.643 (ibex-sun)
error is R.A. +0.000 Decl. +0.000
for a total 0.000 deg
ibex_rotate -o -r +173.921 -d +2.643 -w ibex-sun -t 2019-09-21T14:46:15.078Z
Quaternion +0.000000,+0.000000,+0.000000,+0.000000
points axis +1.000000,+0.000000,+0.000000
towards ECI -0.993319,+0.105787,+0.046113
which is R.A. +173.921 Decl. +2.643
missing R.A. +178.129 Decl. +0.817 (ibex-sun)
error is R.A. +4.208 Decl. +1.826
for a total 4.585 deg
No Lo O-mode.
There is no overlap with orbit 459 commands by manual inspection or by checking at
http://ibex.unh.edu/cgi-bin/ats.cgi.
Command Approval Checklist is attached.
Ken
> On September 3, 2019 at 1:30 PM "Perry, Timothy" <Timothy.Perry at ngc.com> wrote:
>
>
> All,
>
> Attached are the planning files for Orbit #460
>
> Please respond to this thread with comments and approvals.
>
> Approvals are required by COB on 6 Sept 2019.
>
>
> Please note the following:
>
> 1. Battery Balancing
>
> # Orbit 460 Battery Balancing
>
> # 2019-09-17T01:52:18.904Z,Perigee,orbit:460
>
> @ECT_SetLongEclipseFlag TRUE $TIME=2019/09:17:01:00:00
>
> @ECT_SetLongEclipseFlag FALSE $TIME=2019/09:17:02:30:00
>
>
>
> 2. We have 2 IBX-CLC-006 soft Constraint Error’s with this ATS. These errors are acceptable. On 09/16 we have 2 60 minute contacts planned that are separated by 2 hours. The limit for MPS is 90 minutes for a 5 hour period. The 2 hour period between contacts will allow the transmitter to cool down.
>
> USHI01 09/16/19,259,14:00:00 - 15:00:00 160K IBEX-2 Orbit# 460 Hi BG Test & Lo Nominal Sweep
>
> USAK01 09/16/19,259,17:00:00 - 18:00:00 160K IBEX-2 Orbit# 460 SSR_Dump/Tracking Contact
>
>
>
> 3. Command Load Constraint Violation Report (CCVR)
>
> # Input files: 1
>
> # IBEX_2019_251_o0460a_v002.scr
>
>
>
> ==========================
>
> HARD CONSTRAINT VIOLATIONS
>
> ==========================
>
> NO VIOLATIONS.
>
>
>
> ==========================
>
> SOFT CONSTRAINT VIOLATIONS
>
> ==========================
>
> IBX-CLC-006: Planned transmission at 2019/09/16 13:58:00 UTC - 2019/09/16
>
> 15:02:00 UTC is followed by one or more additional transmissions
>
> which, when combined, exceed the maximum transmission time of 5400
>
> seconds within a 18000-second window (total planned transmission
>
> time this window is 7680.000 seconds)
>
> IBX-CLC-006: Planned transmission at 2019/09/16 16:58:00 UTC - 2019/09/16
>
> 18:02:00 UTC is preceded by one or more additional transmissions
>
> which, when combined, exceed the maximum transmission time of 5400
>
> seconds within a 18000-second window (total planned transmission
>
> time this window is 7680.000 seconds)
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2019/09/08 12:14:46 UTC
>
> IBX-CLC-016: No command to enable spin pulse protection was found after
>
> transition to science mode at 2019/09/12 05:16:33 UTC
>
>
>
> ==============
>
> OTHER MESSAGES
>
> ==============
>
> NO MESSAGES.
>
>
>
> Timothy E.Perry
>
> CRS IBEX OCO-2
>
> Mission Operations
>
> tim.perry at ngc.com
>
> Office (703) 406-5976
>
> Cell (301) 606-1430
>
>
>
> [cid:image001.png at 01D542D6.6047A400]
>
>
>
>
>
>
>
> ---------------------------------------------
> 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/20190905/3345c58e/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 5047 bytes
Desc: not available
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20190905/3345c58e/image001-0001.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: IBEX-Command-Approval-Checklist-Rev16e-o0460_KWF.doc
Type: application/msword
Size: 119296 bytes
Desc: not available
URL: <https://lists.sr.unh.edu/pipermail/isocops/attachments/20190905/3345c58e/IBEX-Command-Approval-Checklist-Rev16e-o0460_KWF-0001.doc>
More information about the Isocops
mailing list