Mark, Is that thin or deep pan ?
Bill....WB6BNQ Mark Sims wrote: > Now that I have a precise spot (+/- 4cm) known on my front deck I set up a > tripod and did numerous 1400 point self-surveys with a Thunderbolt. This > spot is surrounded by very tall trees and multipath from the trees, steel > gates and stucco walls, a house, an iron fence, etc. I used four different > antennas: > > 1) A Sokkia geodetic grade L1/L2 antenna > 2) A Aero survey grade L1 only antenna > 3) A Datum timing antenna > 4) A cheap patch antenna > > I could not find any repeatable differences in the performance of any of the > antennas. The $3000+ geodetic grade antenna performed no better than the > cheap $5 dollar patch antenna. > > Composite performance over 22 runs was: > Avg lat error: 1.4 feet, std dev 4.48 feet > Avg lon error: 2.24 feet, std dev 2.87 feet > Avg alt error: 6.00 feet, std dev 15 feet > > Although I did not do any extended timing tests between the antennas, the > numbers that I did see make me suspect that timing performance among the > antennas would be similar. A couple of 24 hour runs between the cheap patch > and the geodetic antenna were the same. A cheapskate could probably get > excellent results by mounting a cheap patch antenna in the middle of a large > pizza pan ground plane. > > _________________________________________________________________ > Windows LiveĀ: Keep your life in sync. > http://windowslive.com/explore?ocid=TXT_TAGLM_WL_BR_life_in_synch_062009 > _______________________________________________ > 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. _______________________________________________ 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.
