Hypack max4/13/2023 For HDOP values (in the range of 0.6-1.8), position errors were recorded and analysed to determine the statistical distribution of GPS position errors corresponding to various HDOP values. To this end, measurement results of a 10-day GPS measurement campaign (900’000 fixes) have been used. It is possible only statistically, based on an analysis of an exceptionally large measurement sample. The aim of this article is to determine the relation between GPS position error and HDOP value. The variability of the UERE causes the actual measurements (despite an exact theoretical mathematical correlation between HDOP value and position error) to indicate that position errors differ for the same HDOP value. However, the UERE value is a magnitude variable in time, especially due to errors in radio propagation (ionosphere and troposphere effects) and it cannot be precisely predicted. The non-dimensional HDOP coefficient, determining the influence of satellite distribution on the positioning accuracy, may be calculated exactly for a given moment in time. 2D position error in the Global Positioning System (GPS) depends on the Horizontal Dilution of Precision (HDOP) and User Equivalent Range Error (UERE).
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |