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Abstract
A combined noise scatterometer/ radiometer operating in the C-band is described. The radiometer is of the noise-injection type, achieving a high degree of accuracy and stability (better than 0-5 deg K.). The noise scatterometer is based on design techniques normally only found in the realm of radiometers, and, through this, extraordinary stability is ensured ( better than 003dB). The instrument is intended for precise comparison of brightness temperatures and backscatter coefficients.