GPS under rainy day

| Has anyone gotten data from a GPS module during fly in a rainy day? | Was that good? Was it to long to recover synchronization?

I'm not really familiar with your `GPS module', but your standard hand-held or vehicle mounted GPS works just fine, even in the heaviest rain.

GPSs work at around 1-1.5 mhz (very low frequencies) ... I don't think rain attenuates these frequencies by any signifigant degree. Perhaps you're thinking of systems like DirectTV which use frequencies around

Hi,

Actually the following is true:

The satellites transmit on two L-band frequencies: L1 = 1575.42 MHz and L2 = 1227.6 MHz

The frequencies are GHz, not MHz. Signals are somewhat degraded by atmospheric effects (weather), but rarely enough to cause any difficulty in computing position!

John

Doug McLaren wrote:

| The satellites transmit on two L-band frequencies: L1 = 1575.42 MHz and | L2 = 1227.6 MHz | | The frequencies are GHz, not MHz.

Oops. Well, what's a factor of 1000 between friends?

:)

| Signals are somewhat degraded by atmospheric effects (weather), but | rarely enough to cause any difficulty in computing position!

Certainly, you wouldn't be flying in such weather ...

I hate to burst any bubbles, but if GPS signals were degraded by weather I very seriously doubt that the FAA would ever approve a GPS approach to anywhere.

They have approved several with the proper GPS equipment.

Jim Branaum AMA 1428

Six_O'clock_High Target snipped-for-privacy@Guns.com

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