T
Tman
Does anyone know of a technology, module, chip that can do precise locationdetermination...
I need something that can get 4cm (centimeters) or better repeatable (not absolute) location accuracy, in an area approx 100m x 100m (or so)... 1 update per second is fine.
I am pretty sure that this is beyond the capability of GPS.
I can envision a "local LORAN-like" solution consisting of: 3 fixed stations, 1 which is a master transmitter, and the other two of which transmit a different frequency, but with a phase-locking arrangement. Then, the sensor would need to sense these 3 frequencies, do a phase difference determination, and then use this to augment a GPS coordinate with a hyperbolic line of transmission.
Just as a reasonability check, 10degrees of phase at 150MHZ works out to something like 5cm or so. Higher frequencies being even more precise.
Thanks for any ideas, before I go about building something like this myself!
Tman
I need something that can get 4cm (centimeters) or better repeatable (not absolute) location accuracy, in an area approx 100m x 100m (or so)... 1 update per second is fine.
I am pretty sure that this is beyond the capability of GPS.
I can envision a "local LORAN-like" solution consisting of: 3 fixed stations, 1 which is a master transmitter, and the other two of which transmit a different frequency, but with a phase-locking arrangement. Then, the sensor would need to sense these 3 frequencies, do a phase difference determination, and then use this to augment a GPS coordinate with a hyperbolic line of transmission.
Just as a reasonability check, 10degrees of phase at 150MHZ works out to something like 5cm or so. Higher frequencies being even more precise.
Thanks for any ideas, before I go about building something like this myself!
Tman
