05009277 is referenced by 15 patents and cites 8 patents.

A form of the disclosed invention employs data validation and screening based on the proximity of sequentially measured data points. Another form of the invention detects noisy conditions manifested in a pilot signal measurement, and discards data taken just after (and/or, if desired, just before) detection of the condition.

Title
Method and apparatus for position determination
Application Number
7/495330
Publication Number
5009277
Application Date
March 19, 1990
Publication Date
April 23, 1991
Inventor
Robert Butler
Milford
CT, US
Seymour J Sindeband
Pound Ridge
NY, US
Agent
Martin Novack
Assignee
Science Accessories
CT, US
IPC
G08C 21/00
View Original Source