[Isocops] IBEX Orbit# 151 ATS v003 - question!

[Reno, Michelle]

2b got cut off... They use start/stop bins of 1,1 to sample the entire sky in order to allow the spin bin locations to drift across the sky (occurs during outages) without losing O-mode in the desired incoming hemisphere. 

________________________________

From: isocops-bounces at lists.sr.unh.edu on behalf of Reno, Michelle
Sent: Sun 12/18/2011 3:46 PM
To: Tapley, Mark; Ibex Mission Operations; Bret Hautamaki; IBEX-FDG; IBEXOPS/ORB; ISOC at New Hampshire; John Cavallo; Mark Tapley; Robert Lockwood; Roland Vanderspek; Ryan Tyler; Sheral Wesley; Thomas Regiec; Tim Perry; Walker Cross
Subject: Re: [Isocops] IBEX Orbit# 151 ATS v003 - question!


Hi Mark,
 
Yes, this is Ok, but thanks for checking! Here are the dependencies for the commands :
 
1. Lo in Moon FOV - no dependencies. Lo Star Sensor does not interact with ACS. (See Harald's email below)
 
2. Lo O-mode (outage)
   2a. Entrance into O-mode ~30-120 minutes after ASCENDING. Return to Normal mode 30-120 minutes before DESCENDING commands.  
   2b. No dependence on star tracker outages. Lo decided to go with O-mode start/stop bins of 1,1, which use O-mode across the entire sky. They do this to avoid 
 
3. Maneuver (outage, eclipse)
   3a. No inertial precession maneuver during a star tracker outage.
   3b. No inertial precession maneuver during the o150 - 152 eclipses. Ken redid the Forecast STF so the maneuvers start ~3h after the end of the eclipse, per Ryan Tyler's suggestion. (See eclipse plan below)
 
~~~
Ryan's inputs for setting the long eclipse flags for o150-152 eclipses :
Here's what we should do for each orbit:

150 (12/29/11 eclipse):
1. As discussed, move inertial maneuver to avoid coinciding with eclipse
event.
2. No further action

151 (01/07/12 eclipse):
1. 90 minutes prior to the start of the eclipse, set the long eclipse flag
to TRUE
2. 2 hours after the end of the eclipse, set the long eclipse flag to FALSE
(no further cell balancing is needed)
3. Schedule the inertial maneuver for sometime that is NOT within the span
of the long eclipse flag being set to TRUE
4. Schedule ground contact for sometime that is NOT within the span of the
long eclipse flag being set to TRUE

152 (01/16/12 eclipse):
1. 90 minutes prior to the start of the eclipse, set the long eclipse flag
to TRUE
2. 2 hours after the end of the eclipse, set the long eclipse flag to FALSE
(no further cell balancing is needed)
3. Schedule the inertial maneuver for sometime that is NOT within the span
of the long eclipse flag being set to TRUE
4. Schedule ground contact for sometime that is NOT within the span of the
long eclipse flag being set to TRUE
(Note: here I'm figuring it's easier to go ahead and set the long eclipse
flag for the eclipse even though it's likely not required. We were going to
set it for cell balancing anyway, so I figure we may as well turn it on for
the eclipse and leave it on for balancing afterward.)

Let me know if there are any questions/comments.

-Ryan

~~~
Here is Harald's response on the O-mode during the outage to Tim :
 
Hi Tim,

This outage is expected and we included that in our planning for our observations.

Best,
Harald
 
 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Chelle Reno
Austin Mission Consulting
(210) 478-7337 (c)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

________________________________

From: isocops-bounces at lists.sr.unh.edu on behalf of Mark Tapley
Sent: Sun 12/18/2011 3:25 PM
To: Ibex Mission Operations; Bret Hautamaki; IBEX-FDG; IBEXOPS/ORB; ISOC at New Hampshire; John Cavallo; Mark Tapley; Robert Lockwood; Roland Vanderspek; Ryan Tyler; Sheral Wesley; Thomas Regiec; Tim Perry; Walker Cross
Subject: [Isocops] IBEX Orbit# 151 ATS v003 - question!



All,
        It looks like we achieve the trifecta, temporarily::



2011-12-29T23:36:34.035Z,StarTrackerOutageStart,orbit:151,dueTo:earth

2011-12-30T00:49:51.973Z,MoonInLoFovStart,orbit:151

   @CEU_LO_SCIENCE_MODE OXYGEN $TIME=2011/12:30:01:01:00


        In here, there are 11 hours of O-mode, Moon in Lo FOV, and
Star tracker out, all at the same time. Is this OK?


2011-12-30T12:11:26.454Z,MoonInLoFovStop,orbit:151

2011-12-31T10:42:09.096Z,StarTrackerOutageStop,orbit:151,dueTo:earth



   @CEU_LO_SCIENCE_MODE NORMAL $TIME=2012/01:02:11:58:00


--
                                                - Mark     210-379-4635
-----------------------------------------------------------------------
Large Asteroids headed toward planets
inhabited by beings that don't have
technology adequate to stop them:

                                Think of it as Evolution in Fast-Forward.

Please restrict discussions on this email list to non-ITAR sensitive topics.
______________________________________________
Isocops mailing list
Isocops at lists.sr.unh.edu
http://lists.sr.unh.edu/mailman/listinfo/isocops


-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.sr.unh.edu/mailman/private/isocops/attachments/20111218/8418e6fc/attachment.html