Effects of Non-Uniform Beam-Filling on Rainfall Retrieval for the TRMM Precipitation Radar
the Tropical Rainfall Measuring Mission (TRMM) will carry the first spaceborne radar for rainfall observation.
tropical rainfall↗
Engineering topics
Haddad, Z.
Publications and source records attributed to Haddad, Z..
On Parametrizing the Rain Drop Size Distribution
This paper addresses the problem of finding a parametric for for the rain drop size distribution which 1) is an appropriate model for tropical rainfall, and 2) involves statistically independent parameters.
rain drop size remote sensing↗
Optimal Data Fusion of Radar and Passive Microwave Measurements in the Extimation of Vertical Rain Profiles
It is easy to understand heuristically why single-frequency spaceborne radar measurements, by themselves, are not sufficient to solve the inverse problem of retrieving an exact underlying rain-rate profile.
rain profiling data fusion↗
Stochastic Filtering of Rain Profiles Using Radar, Surface-Referenced Radar, or Combined Radar, or Combined Radar/Radiometer Measurements
We describe a computationally efficient nearly-optimal Bayesian algorithm to estimate rain profiles, given a radar reflectivity profile at a single attenuating wavelength.
attenuation passive microwave brightness temperatu↗
Measurement of Rainfall Path Integrated Attenuation at Nadir: A Comparison of Radar and Radiometer Methods at 13.8GHz
An approach for reducing the ambiguity in the retrieved rainfall profile from spaceborne rain radar is to use the path integrated attenuation as a constraint.
radar surface reference technique microwave radiom↗
Optimal Empirical Z-R Relations
We attempt to mathematically justify the two empirical approaches to the problem of deriving Z-R relations, namely the power-law regression and the 'probability matching method'.
mathematical assumptions power-law Z-R relation pr↗
Two-bit Quantization for Q-dB Gain
For space missions such as NASA's Magellan mission to Venus and the Cassini mission to Saturn, the communication channel to Earth has a limited channel capacity.
block-adaptive quantization↗
Optimal Estimation of Rain Rate Profiles From Radar Returns at Attenuating Wavelengths
There are significant inherent ambiguities when one tries to determine a particular vertical rain intensity profile from a given time profile of radar echo powers measured by a downward-looking (spaceborne or airborne) radar at a single attenuating frequency. In this paper, we quantify these ambiguities mathematically, and examine their effects on the performance of rain-rate retrieval algorithms initially proposed for use by the Precipitation Radar of the Tropical Rainfall Measuring Mission (TRMM).
vertical rain intensity profiles spaceborne radar ↗