[Isocops] ATS for Orbit# 205 (4 - 13 May 2013)

Tim Perry Perry.Tim at orbital.com
Mon Apr 22 09:10:04 EDT 2013


Ken,
   When I was trying to generate an OEF for Orbit 205 I ran into a couple
errors. I went back to a previous ephem to see if I would get the same
error. Well I found that the errors were caused by my inputs being off.
Unfortunately I forgot to change the ephem file back to the DOY 106.
       Tim




From:	fair-play at comcast.net
To:	Tim Perry <Perry.Tim at orbital.com>
Cc:	Bret Hautamaki <hautamaki.bret at orbital.com>, IBEX-FDG
            <IBEX.fdg at applieddefense.com>, IBEXOPS/ORB
            <ibexops at orbital.com>, ISOC at New Hampshire
            <isocops at lists.sr.unh.edu>, John Cavallo
            <cavallo.john at orbital.com>, Mark Tapley <mtapley at swri.edu>,
            Nigel Angold <ngangold at earthlink.net>, Robert Lockwood
            <lockwood.robert at orbital.com>, Roland Vanderspek
            <roland at space.mit.edu>, Ryan Tyler <tyler.ryan at orbital.com>,
            Sheral Wesley <wesley.sheral at orbital.com>, Thomas Regiec
            <regiec.thomas at orbital.com>, Tim Perry <perry.tim at orbital.com>,
            Ken Fairchild <fair-play at comcast.net>, Chelle Reno
            <mreno at swri.edu>
Date:	04/21/2013 08:02 PM
Subject:	Re: [Isocops] ATS for Orbit# 205 (4 - 13 May 2013)



Tim,

I noticed that the .oef file says that the predictive file

IBEX_Ephem_2013_097_09_29_v002.e

was used to generate it.  However, the current predictive file is

IBEX_Ephem_2013_106_08_21_v001.e

Is there a reason why you used the older predictive file?

By the way, I discovered that we are no longer including the predictive
ephemeris file in the STF header comments.  That's because the current 140
day predictive files end after the current 2 year predictive file.  I've
requested a new 2 year predictive file.

Ken

From: "Tim Perry" <Perry.Tim at orbital.com>
To: "Bret Hautamaki" <hautamaki.bret at orbital.com>, "IBEX-FDG"
<IBEX.fdg at applieddefense.com>, "IBEXOPS/ORB" <ibexops at orbital.com>, "ISOC
at New Hampshire" <isocops at lists.sr.unh.edu>, "John Cavallo"
<cavallo.john at orbital.com>, "Mark Tapley" <mtapley at swri.edu>, "Nigel
Angold" <ngangold at earthlink.net>, "Robert Lockwood"
<lockwood.robert at orbital.com>, "Roland Vanderspek" <roland at space.mit.edu>,
"Ryan Tyler" <tyler.ryan at orbital.com>, "Sheral Wesley"
<wesley.sheral at orbital.com>, "Thomas Regiec" <regiec.thomas at orbital.com>,
"Tim Perry" <perry.tim at orbital.com>
Sent: Saturday, April 20, 2013 12:22:59 PM
Subject: [Isocops] ATS for Orbit# 205 (4 - 13 May 2013)



All,
    I did receive 2 errors. The Second one was an easy one and this is
covered by the eclipse commands that we added for the medium eclipse. The
first one took a little bit time to understand. In Orbit 204 there was a
sun maneuver at Apogee.  The maneuver window was from 2013-04-29T21:34:03 -
2013-04-29T22:04:05 and the sun maneuver was from 2013-04-29T21:34:03 -
2013-04-29T21:49:03. So, in the OEF file for Orbit 204 these times were
correct. Now, when the new forecast STF file was used to generate the OEF
file for Orbit 205. The maneuver window had shifted by 1 minute and 31
seconds. In the Orbit 205 OEF file I found that the sun maneuver begin was
pulled from the history. But the sun maneuver end was not and I think that
this was because of where the new  maneuver window begin was placed in the
OEF file. The end time is the last time in the orbit 205 OEF file. MPS
tried to find the SunMvrEnd and it couldn't. The sun maneuver was
successful. So, I am comfortable with releasing this command load for
everyone to approve.

Please respond to this email thread with your comments/approvals.  All
comments/approvals are required before 22 Apr 13 @2100 UTC

==========================
HARD CONSTRAINT VIOLATIONS
==========================
NO VIOLATIONS.

==========================
SOFT CONSTRAINT VIOLATIONS
==========================
IBX-CLC-001: Sun precession maneuver at 2013/04/29 21:34:03 UTC -
2013/05/18
             09:52:58 UTC (one endpoint unknown) overlaps eclipse at
2013/05/04
             19:45:49 UTC - 2013/05/04 20:52:24 UTC
IBX-CLC-015: Battery charge falls below minimum from 2013/05/04 20:39:49
UTC -
             2013/05/04 21:20:04 UTC. Lowest charge level is 7260.242983
             watt-minutes during this interval.

==============
OTHER MESSAGES
==============
NO MESSAGES.

STF files:
# Filename:            IBEX_2013_forecast_04mar13-18jun13_v001.stf
#Orbit: 204
# Sun pointing maneuver
2013-04-29T21:34:03.000Z|ManeuverWindowStart
2013-04-29T22:04:05.000Z|ManeuverWindowEnd

# Filename:            IBEX_2013_forecast_01apr13-24jul13_v001.stf
#Orbit: 204
# Sun pointing maneuver
2013-04-29T21:35:34.000Z|ManeuverWindowStart
2013-04-29T22:05:36.000Z|ManeuverWindowEnd

OEF Files:
# Filename:            IBEX_2013_115_o0204a_v001.oef
2013-04-29T21:34:03.000Z,ManeuverWindowStart
2013-04-29T21:34:03.000Z,SunMvrBegin,
2013-04-29T21:49:03.000Z,SunMvrEnd
2013-04-29T22:04:05.000Z,ManeuverWindowEnd,orbit:204

# Filename:            IBEX_2013_125_o0205a_v001.oef
2013-04-29T21:34:03.000Z,SunMvrBegin,
2013-04-29T21:35:34.000Z,ManeuverWindowStart,orbit:204
2013-04-29T22:05:36.000Z,ManeuverWindowEnd,orbit:204




(See attached file: IBEX_2013_125_o0205a_v001.ccvr)(See attached file:
IBEX_2013_125_o0205a_v001.oef)(See attached file:
IBEX_Orbit205Contacts.txt)(See attached file:
IBEX_2013_125_o0205a_v001.txt)

Timothy E. Perry
IBEX Mission Ops Lead
perry.tim at orbital.com
Office: (703) 406-5976
Cell:(301) 606-1430



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