“Patent US5093800 Global positioning system satellite signal simulator” – What Happened On The Flat Earth This Week?

“Patent US5093800 Global positioning system satellite signal simulator”

Global positioning system satellite signal simulator
US 5093800 A

ABSTRACT
A test transmitter apparatus has been designed for testing global positioning system (GPS) receivers. This test transmitter apparatus has the ability to generate a radio frequency (RF) output which simulates GPS satellite signals. Generally, the RF test signal is generated as follows: A digital test signal is produced by a signal generator which is driven by specific programs run on a suitably adapted computer. The digital signal is then converted to a RF signal by a numerical control oscillator and an analog converter.
SEE AT https://www.google.com.au/patents/US5093800

Because satellites don’t exist and GPS is ground based!

-Backyardjob

FROM
http://whotfetw.com/blog/


Drag photos here
Add Photos:Upload from computerYour Google photos
http://whotfetw.com/blog/?p=9713