Is it possible/interesting to design an antenna that has a low-angle cutoff at 20 or 30 degrees? That probably won't eliminate many satellites that are useful for timing receivers.
I'm interested in things like a Z3801A or a ThunderBolt. I'm assuming it is not reasonable to replace the GPS unit. Replacing the antenna might be reasonable, assuming it's cost is low enough. That only helps in a donut shape area around the LightSquared antennas. Farther away it's not necessary. Too close and either the antenna would be too high or the power would burn through the antenna anyway. I live in flat ground. I'm not sure where the nearest cell phone tower is. I don't know of any on the nearby hills to the west. To the east, they are either low or far away. (Maybe I just haven't noticed them yet.) Another option would be a setup to null out an signal at a specific compass angle. I realize this won't help the zillions of currently installed GPS navigation units. They are mostly consumer gear with relatively short expected lifetimes so the FCC might do something like say "5 years from now..." which would be nasty for people like us using ancient gear. -- These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
