Re GPS: Hardly a "low" orbit, Brian: 'GPS
satellites fly in medium Earth orbit (MEO) at an
altitude of *approximately 20,200 km* (*12,550
miles*). Each satellite circles the Earth twice a
day.'
Phil W7OX
On 9/16/15 5:54 AM, brian wrote:
Look at the A/D converter as a chip tool that
could potentially be used in ham RX design.
If one wanted a ham band RX using an A/D front
end, certainly one would add front end filters.
Of course, that would only help solve the
problem with out of band signals. Handling the
vector sum of in band signals would still have
to be designed for.
The concept however is a good one. Who knows
where these A/D chips will be in 2, 5 or 10 years.
I remember when GPS was in its infancy. Many
people thought it was crazy to think that a
bunch of low orbit non-geosynchronous satellites
could be used for extremely accurate
positioning. Besides the ground equipment
required would be too expensive for most users.
History proves them wrong.
73 de Brian/K3KO
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