Bill, It might be a set of cake pans... ;-)
-- Björn > 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 Live: 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. > _______________________________________________ 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.
