Here is a picture of the guts of the antenna that was made for the Thunderbolt. They don't appear to have gone to much effort to have a high horizon.
-Chuck Harris Chuck Forsberg WA7KGX N2469R wrote:
I got a mushroom shaped antenna along with my Thunderbolt. It came with some rg58 terminated in an F connector. I don't know if it is a timing reference antenna or just a plain GPS antenna. Presumably a timing antenna would block low elevation signals to reduce multipath.
<<attachment: Trimble-T-Bolt-Antenna.JPG>>
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