[amsat-bb] Re: Pass prediction algorithm

[kim]

On Mon, 2010-06-28 at 10:26 -0700, B J wrote:
> 
> --- On Mon, 6/28/10, Reid Crowe <reid.crowe at gmail.com> wrote:
> 
> > From: Reid Crowe <reid.crowe at gmail.com>
> > Subject: [amsat-bb]  Pass prediction algorithm
> > To: amsat-bb at amsat.org
> > Received: Monday, June 28, 2010, 8:59 AM
> > I'm trying to write my own pass
> > prediction program for tracking FM 
> > satellites.  This program will this notify the users
> > of upcoming passes 
> > via APRS messaging.  I would like to find an algorithm
> > that will predict 
> > AOS/LOS time and azimuth and the  maximum
> > elevation.  I'm also hoping 
> > this algorithm will not be too computationally intensive as
> > it may 
> > possibly be used for hundreds of different station
> > locations.
> > 
> > Can anyone help?
> 

I would suggest you look at the digi_ned source code. It works great and
does everything you want. There was a change on the last update where he
replace the display of azimuth/elevation to HIGH(over 30 degrees) and
LOW (Below 30 degrees). That change actually works very well when
driving down the road. But it was nice to see the actually numbers when
sitting still. The code before this last update did that. 

73
kim - ac7yy