Ahhh, that's the 64 nanosecond question. I did a lot of self surveys with a geodetic grade antenna over a spot known to within less than a millimeter. Most results were with 6 feet lat/lon 6 meters altitude (hey, can I get a job at JPL landing spacecraft? I can mix english and metric in the same measurement).
But, the key word is most. Some were off over 50 feet lat/lon and 100 meters altitude. Unless you have a known position to compare against you may never know for sure. And, if you have a precisely known location, you can't enter it into the Tbolt with sufficient accuracy since that message uses single precision numbers. I am doing a couple more tests with a 50 foot error and another with all the error in the altitude (those first two graphs were with lat and lon offset by around 141.4 feet and the altitude exact) ---------------------------------------- Or. to put it another way, what could we reasonably expect to see as a position error if the T'bolt is allowed to self survey? _________________________________________________________________ NEW mobile Hotmail. Optimized for YOUR phone. Click here. http://windowslive.com/Mobile?ocid=TXT_TAGLM_WL_CS_MB_new_hotmail_072009 _______________________________________________ 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.
