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1997•Journal of the Japan society of photogrammetry and remote sensingOpen access

Accuracy of point positioning using GPS.

Ryutaro Tateishi, You KUROSAWA

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Abstract

In recent year, we can easily measure three dimensional location at a certain point using a GPS (Global Positioning System) instrument. Generally we can use the some way for positioning, point positioning, DGPS (Differential GPS) and GPS surveyer. It is said that accuracy by point positioning is about 100 meters, DGPS is 3 meters and GPS surveyer is 1 cm. DGPS and GPS surveyer get high accuracy by means of two GPS instruments. One of them are set on known point and the other, observed point. Both of them must be observed at same time. But, when we use a GPS instrument in undeveloped region, it is difficult to determine known point and observe at same time. Therefore, it is important to examine real accuracy of point positioning. We inspected accuracy of point positioning using GPS instruments produced in some companies.

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What this paper is about

In recent year, we can easily measure three dimensional location at a certain point using a GPS (Global Positioning System) instrument. Generally we can use the some way for positioning, point positioning, DGPS (Differential GPS) and GPS surveyer. It is said that accuracy by point positioning is about 100 meters, DGPS is 3 meters and GPS surveyer is 1 cm. DGPS and GPS surveyer get high accuracy by means of two GPS instruments. One of them are set on known point and the other, observed point. Both of them must be observed at same time. But, when we use a GPS instrument in undeveloped region, it is difficult to determine known point and observe at same time. Therefore, it is important to examine real accuracy of point positioning. We inspected accuracy of point positioning using GPS instruments produced in some companies.

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Available abstract

In recent year, we can easily measure three dimensional location at a certain point using a GPS (Global Positioning System) instrument. Generally we can use the some way for positioning, point positioning, DGPS (Differential GPS) and GPS surveyer. It is said that accuracy by point positioning is about 100 meters, DGPS is 3 meters and GPS surveyer is 1 cm. DGPS and GPS surveyer get high accuracy by means of two GPS instruments. One of them are set on known point and the other, observed point. Both of them must be observed at same time. But, when we use a GPS instrument in undeveloped region, it is difficult to determine known point and observe at same time. Therefore, it is important to examine real accuracy of point positioning. We inspected accuracy of point positioning using GPS instruments produced in some companies.

Key concepts: Global Positioning System, Precise Point Positioning, Differential GPS, Precision Lightweight GPS Receiver, Point (geometry), Computer science, Geodesy, GPS disciplined oscillator

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