Exhaustive global grid search in computing receiver position from modular satellite range measurements
نویسنده
چکیده
A global grid search algorithm with an application in weak signal satellite positioning is implemented and tested numerically. The algorithm consists of local GaussNewton search and a global starting point chooser, and it can be generalized as a global optimization method for functions with an attraction basin of computable minimum radius. The method is shown to find the global minimum in a bounded region in predictable time.
منابع مشابه
GPS Position Can Be Computed without the Navigation Data
This paper presents an algorithm for computing a GPS receiver's position and the current time from C/A-code phase measurements to at least six satellites and a set of valid satellite ephemerides. Reference position and reference time are not necessary. The process uses a cost function having numerous local minima in addition to the global minimum. An exhaustive search over the 5dimensional time...
متن کاملRTDGPS Implementation by Online Prediction of GPS Position Components Error Using GA-ANN Model
If both Reference Station (RS) and navigational device in Differential Global Positioning System (DGPS) receive signals from the same satellite, RS Position Components Error (RPCE) can be used to compensate for navigational device error. This research used hybrid method for RPCE prediction which was collected by a low-cost GPS receiver. It is a combination of Genetic Algorithm (GA) computing an...
متن کاملAccuracy Improvement of Tropospheric Delay Interpolation in RTK Networks
The effect of troposphere on the signals emitted from global navigation satellite system (GNSS) satellites, appears as an extra delay in the measurement of the signal traveling from the satellite to receiver. This delay depends on the temperature, pressure, humidity as well as the transmitter and receiver antennas location. In GNSS positioning, tropospheric delay effects on accuracy of differen...
متن کاملSatellite Orbit Determination Using a Single-Channel Global Positioning System Receiver
A proposed satellite orbit determination system has been analyzed, one that uses measurements from a single-channel Global Positioning System (GPS) receiver. The purpose of this study is to predict the likely efficacy of a low-power autonomous orbit determination system. The system processes the pseudo range outputs of the receiver using an extended Kalman filter. The receiver cycles through di...
متن کاملThe regional estimates of the GPS satellite and receiver differential code biases
The Differential Code Biases (DCB), which are also termed hardware delay biases, are the frequency-dependent time delays of the satellite and receiver. Possible sources of these delays are antennas and cables, as well as different filters used in receivers and satellites. These instrumental delays affect both code and carrier measurements. These biases for satellites and some IGS stations tend ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2006