Radio interferential measurements of sea level oscillations with large tidal amplitude     

Glazman  R. 《Oceanic Engineering, IEEE Journal of》1981,6(3):73-76

A tide height measurement technique usingS-band radio waves in an oblique incidence interferometer is reviewed. Generalization of the technique is described which reduces the required bandwidth of the radio frequency adjustment and increases its efficiency. This generalization, however, introduces an ambiguity in the height determination and also requires specification of the phase shift of the radio waves specularly reflected from the sea surface. The ambiguity is shown to be easily removable given coarse information about the expected time derivative of tidal height. The influence of the phase shift which contains sea-wave information is studied analytically and requirement in its specification is evaluated to have an accuracy ofpm1deg. This corresponds to a tide height determination accuracy ofpm1cm. The method is designed for coastal regions where a bistatic experiment geometry is feasible.  相似文献   

An experimental implementation of interferometric techniques for sea level variation measurements and reflection coefficient phase determination     

Glazman  R. 《Oceanic Engineering, IEEE Journal of》1982,7(4):155-160

A remote interferometric method to measure sea level variations in coastal regions is discussed and results of numerous experimental tests are summarized. A bistatic scheme of measurements is employed with horizontal separation of transmitter-receiver terminals ranging from 400 m to 2700 m. To account for the impact of sea surface roughness, the method incorporates a reflection coefficient phase measuring procedure. The phase of the coherent reflection coefficient measured in the experiments is presented as a function of sea state. The experiments were performed with electronic distance measuring equipment operating at 10-cm wavelength. Preliminary estimates of the measurement accuracy show that errors in sea level variation determination were approximately between 3 cm and 9 cm. These observed errors exceed the theoretical predictions because of various causes, such as technical limitations of the instrumentation, effect of sea surface roughness, etc. More work needs to be done, especially in the area of signal processing, in order to sort out these various effects and reduce their impact on measurement accuracy.  相似文献   

Erratum: "An experimental implementation of interferometric techniques for sea level variation measurements and reflection coefficient phase determination"     

Glazman  R. 《Oceanic Engineering, IEEE Journal of》1983,8(1):51-51

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