Re: digital freedom in iitm?

On 19:29:08 May 11, Sivasankar Chander wrote:

> Certainly odd  news. The GPS C/A receive signal is at 1575 MHz,
> which can face interference from certain kinds of microwave ovens
> and microwave devices. But my simple guess is that the tree cover
> at IITM is causing too much attenuation of the signal from the
> satellites at low elevations from the horizon. I've seen this behaviour
> before from Garmin units - they need a clear line-of-sight to
> the satellites for optimal performance.

The frequency sounds too low and that would cause all sorts of
propagation problems.

I believe there are various factors at play here.

Firstly as Sivachander suggested vegetation is a big problem. And for
certain frequencies, the moisture/rain/weather etc.

Secondly GPS satellites are not geostationary (Am I wrong?). So their
orbits may not be favorable at certain times.

IOW testing it during a hot summer day and collecting multiple samples
might help.

-Girish
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