Browsing by Author "Short, D.A."
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Item Exceedances and Moments in Data Containing Zeros(1996) Fokianos, Konstantinos; Kedem, Benjamin; Short, D.A.; ISRRain rate-the speed of rain in mm/hr-assumes zero values when it is not raining, and positive values on a continuum otherwise. For large areas, empirical evidence points to a high correlation between the instantaneous area average rain rate and the instantaneous fractional area where rain rate exceeds a fixed positive threshold. An explanation is provided by appealing to the man value theorem for integrals, in conjunction with the mixed nature of the probability distribution of rain rate. Using a multinomial logits model, the fractional area also is shown useful as a time dependent covariate in categorical prediction of the area average.Item On Combining Instruments(1996) Fokianos, Konstantinos; Kedem, Benjamin; Qin, J.; Haferman, Jeffrey L.; Short, D.A.; ISRSuppose two instruments Io and I1 measure the same quantity with the same resolution, where it is know Io is more reliable. The second, I1 , is assumed a distortion of Io in some sense. A method is outlined whereby: 1. The information from both Io , I1 is combined to increase the reliability of Io . 2.. The distortion is qualified. An example is given in terms of ship borne precipitation radar and a space borne radiometer both measuring rain rate.