Hello everyone！I would like to ask the current navigation C/A code GPS receiver can achieve the positioning accuracy is how much?98 years ago, the accuracy is 15m, the new literature is not seen.Thank you very much
SA after the removal of GPS navigation positioning accuracyJournal of aircraft measurement and control >>2000 04Hu Songjie, Chen LiIn May 1, 2000, the U.S. government announced that the use of SA technology, the non chartered GPS users real-time navigation positioning accuracy can be increased, how many levels, is a widespread concern. Through a lot of analysis and calculation, which shows that the elimination of SA technology, the accuracy of the pseudo range increased from 60m to 10m within the C/A code of the broadcast ephemeris precision is between 10 ~ 30m, and then gives quantitative analysis of real-time navigation and positioning accuracy.
In general, the direct positioning accuracy is between 7-15 meters. Do the difference can be done even centimeters.
Geodesic receiverGeodesic receivers are mainly used for precision geodesy and precision engineering surveying. This kind of instrument mainly usesThe relative positioning of the wave phase observation value is high. Instrument structure is complex, the price is more expensive.Timing receiverThis kind of receiver mainly uses the GPS satellite to provide the high accuracy time standard to carry on the time service, commonly used Yu TianwenTime synchronization in Taiwan and radio communications.Classification by carrier frequencyYour reference ~ ~ ~ ~ ~ ~ ~ ~ AINo more on the Baidu search, in the Baidu page input [navigation C/A code GPS receiver accuracy] on the line
Navigation receiverThis type of receiver is mainly used for the navigation of the moving carrier. This kind of receiver generally uses C/A code pseudorange measurement, single point real-time positioning accuracy is low, generally is + 25mm,When the SA effect is + 100mm. This kind of receiver is cheap and widely used. According to the different application fields,Such receivers can be further divided into:Vehicle type for vehicle navigation and positioning;Navigation type for ship navigation and positioning;Aircraft type for aircraft navigation and positioning. Because of the fast running speed of the aircraft, it is used in aviationThe machine is suitable for high speed motion.Satellite borne satellite navigation and positioning. As the speed of the satellite is as high as 7km/s, the receiverHigher requirements.
Accuracy of GPS receiverGPS receiver has military and civilian type.The global positioning accuracy of military receiver is about one meter.Civil receiver type and navigation type.Navigation receiver is the kind of hand-held or vehicle that is seen, the situation does not correct the positioning accuracy in the tens of meters, the accuracy can be adjusted to about 4 meters.Measuring receivers are divided into two types: static and dynamic (RTK). Dynamic machine can be used for static or dynamic. In the static mode of operation, the precision can reach about 1cm after 30 minutes from the known point 30km, and the real-time positioning accuracy is about 2cm in the dynamic mode of operation from the known point 10km.The military receiver can receive the C/A P2 code released by the GPS satellite and the secret P1, so it has high precision. Civil navigation receiver can only receive GPS satellite released public C/A ephemeris, so low precision. The measurement receiver receives the C/A code ephemeris and the P1, P2 code carrier information, through the analysis of its carrier phase to improve the measurement accuracy, a set of instruments is composed of at least two receivers, larger volume.Category: unclassified - gpsworks @
