[Isocops] CAR : Mon 6/14 1pm EDT : Lo Special Ops SCCB

[Dunn, Greg]

Setting a start or stop bin of 0 won't work, since a different task
handles setting the voltages on spin boundaries.  To get 360 degree O
mode, use 1/1 for the start/stop bins.  On spin boundaries, bin 0 will
be set to the normal mode voltage, but all other bins will use the O
mode setting.

-- Greg 

> -----Original Message-----
> From: Nathan Schwadron [mailto:nschwadron at mac.com] 
> Sent: Thursday, June 10, 2010 8:38 PM
> To: Reno, Michelle
> Cc: Harald Kucharek; Stephen Fuselier; David Heirtzler; Peter 
> Wurz; Herb Funsten; Mark Tapley; Dan Reisenfeld; McComas, 
> Dave; Eberhard Moebius; Dunn, Greg; Michelle Reno; isoc cops
> Subject: Re: [Isocops] CAR : Mon 6/14 1pm EDT : Lo Special Ops SCCB
> 
> Hi All
> 
> I spoke to Stephen today and recommended that we run the 
> O-mode with a start bin of 0 and a stop bin of 59. The 
> rationale is as follows. If we have a start tracker outage 
> during O-mode and view only part of the great circle (start 
> bin > 0 and stop bin <59) then we would end up not being able 
> to reconstruct the data. So we are still at risk if a star 
> tracker outage occurs. On the other hand if we view the whole 
> great circle (start bin = 0 and stop bin = 59) then we would 
> *not* compromise the data in case of a star tracker outage. 
> 
> The downside of using a start bin =0 and a stop bin = 59 is 
> that we will exclude some of the  normal viewing during an 
> orbit. However, I do not see this as a big downside. If we 
> want to have some normal viewing, then we could switch 
> between the O-mode table 3 and ! a normal can choose. In this 
> case, because we view full great circles (start bin = 0 and 
> stop bin =59), both the normal viewing and the O-mode viewing 
> would be insensitive to a star tracker outage. I view this as 
> being a far more robust solution and I think it will be far 
> more successful in the long run. 
> 
> Let me be clear that I am happy to perform the test with 
> either the original CAR from Chelle or the slight revision attached. 
> 
> Nathan
> 
>