It may be necessary to use 7zip to decompress the file. In addition, the Ps-LAMBDA toolbox is provided, which allows evaluation of the ambiguity resolution success rate for the different ambiguity estimators and with the option to choose between different approximations, lower or upper bounds.įill the form below and press Submit to obtain the compressed file with the latest version of LAMBDA and Ps-LAMBDA or LAMBDA (Python). Options are included for partial ambiguity resolution and ambiguity testing with the ratio test. Users may choose whether to use integer least squares, integer bootstrapping or integer rounding. The LAMBDA toolbox can be used within your GNSS processing for ambiguity resolution. Two open source Matlab toolboxes have been developed by Delft University of Technology and Curtin University. This search is the second step in the LAMBDA method. The decorrelation is essential to allow for an efficient search for the integer candidate which solves the integer minimization problem. First the ambiguities are decorrelated, by means of the Z-transformation. With the LAMBDA method, the integer least squares (ILS) ambiguity estimates are computed in two steps. LAMBDA stands for Least-squares AMBiguity Decorrelation Adjustment. One of the methods to do this is the LAMBDA method which was introduced by Teunissen (1993) and developed at the Delft University of Technology in the 1990s. The key of precise GNSS applications is to resolve the double-differenced (DD) carrier phase ambiguities.
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