In this work, the trend of the Urban Heat Island (UHI) of Rome is analyzed by both ground-based weather stations and a satellite-based infrared sensor. First, we have developed a suitable algorithm employing satellite brightness temperatures for the estimation of the air temperature belonging to the layer of air closest to the surface. UHI spatial characteristics have been assessed using air te...

Geo-centric web interface such as MSN Virtual Earth (http://local.live.com) and Google Maps (http://maps.google.com) are useful to visualize spatially and geographically related data such as addresses, neighborhoods, weather, traffic, and so on. Desires to augment additional useful information to these interfaces have led people to create custom applications that overlay their own data on top o...

Ubiquitous geo-sensing enables context-aware analyses of physical and social phenomena, i.e., analyzing one phenomenon in the context of another. Although such context-aware analysis can potentially enable a more holistic understanding of spatio-temporal processes, it is rarely documented in the scientific literature yet. In this paper we analyzed the collective human behavior in the context of...

Several studies were devoted to investigating the effects of meteorological factors on the occurrence of stroke. Regression models had been mostly used to assess the correlation between weather and stroke incidence. However, these methods could not describe the process proceeding in the background of stroke incidence. The purpose of this study was to provide a new approach based on Hidden Marko...

In contrast to those applications outdoor environments are a great challenge for autonomous robots. Obstacles are unknown, well prepared maps do not exist and the terrain is highly uneven. Dynamic changes of the environment are more frequent than indoors due to weather and daylight influences. These environments require all-terrain vehicles with multiple sensors to detect and analyze the robots...

The 24-hour 500-mb. barotropic forrcasts prepared by the Joint Numerical Weather Prediction Unit (JNWPU) have been investigated in 30 cases of rapid sea level cyclogenesis. Composite error maps are presented for the region of cyclogenesis. The 500-mb. errors are found t o bc significantly larger when the solenoidal field at that level is strong than when it is weak.

1. introduction one of the most important conditions to have dusty weather beside of unstable weather is existence or non-existence of humidity. unstable weather having enough humidity will produce rain and thunder storm, else if the result will be dust storm. number of particles of dusty storm is depended to wind speed, sec of soil and its dimension. furthermore, vegetation type has importance...

In this paper, differential maps of total zenith delay (TZD) estimated by GPS and by Weather Research and Forecasting Model (WRF) numerical data are compared with the TZD by Synthetic Aperture Radar (SAR) Interferometry. This maps are generated by processing a set of interferometric SAR images acquired by the ENVISATASAR mission over the Lisbon region from April to November of 2009. To obtain T...

Meso(topo)climatic maps and mapping The atmospheric characteristics can be studied from many points of view, most often we talk about time and spatial standpoint. Application of time standpoint leads either to different kinds of the synoptic and prognostic maps production, which presents actual state of atmosphere in short time section in the past or in the near future or to the climatic maps p...