The Volume Velocity Processing（ VVP） retrieval method can be used in the three dimensional structure analysis of wind field

but the accuracy of retrieval results is always affected by the ill-conditioned coefficient matrix. Error analysis and tests with synthetic data were performed by using a simplified VVP method to analyze the characteristics of fitted parameters and to confirm the fitted wind field in retrieval. In the simplified method

only three parameters with particularly large magnitude were s elected. The coefficient matrix is a function of the analysis volume position. Hence

the retrieval errors and condition number v aried accordingly. Selected partial parameters were substituted for full model retrieval and retrieval errors caused by neglected p arameters were qualitatively analyzed to reduce solving difficulties. Observation and calculation errors are inevitable in retrieval.According to the spread of e rrors in the solving process

a demonstration through mathematical deduction was provided to explainthat the large analysis v olume can improve retrieval accuracy. The performance of the simplified VVP method was tested using synthetic data with r andom observation errors to find the fitted wind velocity. Wind model parameters with small magnitude or small position coefficient can be abandoned to simplify the wind field model. The results of the sensitive tests indicate that the r obustness of the simplified VVP method is not highly sensitive to random errors. The accuracy of retrieval results at different e levations is almost similar and may improve when the wind field velocity is large. Considering the observation and calculation e rrors with normal or uniform distribution

we can reduce the influence caused by these errors in an analysis volume. These errors are spread and amplified in the retrieval process. Therefore

preventing the spread of these errors at the beginning of retrieval can improve the accuracy of retrieval results. For the wind field that is suited to use the simplified VVP method

the test result shows that this method can be used to r etrieve the wind field with wind velocity above 20 m /s

which contains 1. 0 m /s random observation error. In addition

the analysis volume size is 10° * 20 Gates. The retrieval results of the 0608"Saomai"typhoon shows that the wind field can be retrieved reasonably and is consistent with the Rankine typhoon model. The retrieved wind profiles indicate that the point of inflexions for wind velocity and direction can be used to confirm the eye region and typhoon height

which are suited to analyze the three dimensional wind field structures of a typhoon. Parameters with small magnitude are abandoned to s implify the wind field model.Thus

difficulties in s olving are decreased and retrieval results become more robust. After confirming that the fitted wind field is suited to retrieval by using the simplified VVP method

the wind field of the 0608 "Saomai"t yphoon is retrieved for a real test case. The three dimensional wind field structures of the 0608"Saomai"typhoon can be obtained with this method and can be used for disastrous weather analysis.