Principles of radar measurement

The principles of radar measurement are discussed in relation to radar calibration. Generally speaking, the instrument and the calibration standard do not present the most difficult problems. A substantial part of the analysis deals with target description. A phenomenological and a field description of extended targets is given. A symbiosis of both phenomenological and theoretical techniques by introducing the different so-called facet descriptions of extended targets is presented. Modeling by facets of finite dimensions with assumed pattern and size distribution is found most promising. Model limitations are discussed.