期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2004
卷号：XXXV Part B3
页码：629-634
出版社：Copernicus Publications
摘要：Code measurement hand-held GPS serves a fast growing user community involved in navigation and data collection for field data collection, tourism, various public services and commercial applications. Most handheld GPS code receivers, however, do not provide instantaneous and intuitive information on the positional error during measurement, which may be important to compromise data accuracy against time efficiency in daily field practice. Herein we describe an experiment on how to assess the positional error of handheld code receivers and discuss a method that improves on the reporting of the positional error to the user in the field when reference points are available. In the experiment, the x and y coordinates of 100 reference points were used to assess the positional error of a handheld GPS code receiver. The coordinates of the points were computed from DGPS carrier phase measurements, and assumed to be error free. The error distribution in x and y for 1, 3, 5 and 10 minute averaging periods were computed to generate a figure of merit that is intuitive and informative to a non-expert GPS user. Results obtained are well within the range of the theoretical accuracy that can be expected for single measurements code receivers
