A procedure to accurately resample spaceborne and ground-based radar data is described, and then applied to the measurements taken from the Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) and the ground-based Weather Surveillance Radar-1988 Doppler (WSR-88D or WSR) for the validation of the PR measurements and estimates. Through comparisons with the well-calibrated, non-atte...

This paper shows methods for defining and rendering Sound Level of Detail (SLOD) for audiographic scenes using corpus-based granular synthesis. We introduce three levels of detail for sound (individual events, statistical texture, background din), to define a proximity profile around the listener. The smooth transition between the levels is assured alternatively by statistical modeling or audio...

The frequency distributions of surface rain rate are evaluated in the Tropical Rainfall Measuring Mission (TRMM) and Special Sensor Microwave/Imager (SSM/I) satellite observations and the NOAA/GFDL global atmosphere model version 2 (AM2). Instantaneous satellite rain-rate observations averaged over the 2.5° latitude 2° longitude model grid are shown to be representative of the half-hour rain ra...

Abstract Evaluation of the performance daily satellite-based rainfall (CMORPH, CHIRPS, GPM IMERG, and TRMM) was done to obtain applicable satellite estimates in groundwater basin Merapi Aquifer System (MAS). Performance data assessed by applying descriptive statistics, categorical bias decomposition on basis intensity classification. This classification is possible measure much detail. CM (CMOR...

Mixture of Gaussians (MOG) has been widely used for robustly modeling complicated backgrounds, especially those with small repetitive movements (such as leaves, bushes, rotating fan, ocean waves, rain). The performance of MOG can be greatly improved by tackling several practical issues. In this paper, we quantitatively evaluate (using the Wallflower benchmarks) the performance of the MOG. with ...

This paper presents an implementation of an IIMMW simulator for use in developing a multisensory fusion methodology for Helicopter DNAW operations. The functional modeling approach based on power representation of the simulated sensors is adopted in the simulation. The detailed power and attenuation models are described and the received power from the target and background is converted into int...

We used airborne imaging spectroscopy and photon transport modeling to determine how biological invasion altered the chemistry of forest canopies across a Hawaiian montane rain forest landscape. The nitrogen-fixing tree Myrica faya doubled canopy nitrogen concentrations and water content as it replaced native forest, whereas the understory herb Hedychium gardnerianum reduced nitrogen concentrat...

Rain cell size is an input requirement for rain-induced attenuation studies. It is useful in estimating the extent of a given radio link path that will traverse the rain medium in a given rain event. The “Synthetic Storm” approach, which requires 1-minute integration time data, is used to derive the proposed rain cell sizes for various climatic zones within South Africa. The conversion of the r...

Propagation measurements at Ku-band over an earth space path have been carried out at Kolkata (22°34’N, 88°29’E) by receiving a signal at 11.172 GHz from the satellite NSS-6 (geostationary at 95°E) since June 2004. The amplitudes of the co-polar signal and the cross-polar component have been monitored along with rain rate and drop size distribution measurements by an optical raingauge and a Jos...

In this paper, we propose an ameliorated physically-based rain rate estimation algorithm for semi-arid regions using the Rayleigh approximation. The proposed algorithm simultaneously uses the reflectivity and the specific differential phase to provide an accurate estimation for both small and large rain rates. In order to validate the proposed estimator, simulated polarimetric rain rate data ba...