Ricerc@Sapienza

.Grazie all’accortezza con cui sono affrontati i diversi argomenti e alla ponderata sequenza con cui gli stessi sono presentati, il volume rappresenta un riferimento ideale sia per chi muove i primi passi verso l’uso di tali strumenti, fondamentali nella formazione del geografo moderno, sia per chi intende approfondire le proprie conoscenze e competenze, acquisendo abilità operative da sviluppare in ipotesi progettuali.

With the recent launch of TechDemoSat-1 and CYGNSS missions, spaceborne GNSS-R data are now available. In order to understand the involved scattering mechanisms, potentialities and limitations of GNSS-R measurements over land, an electromagnetic simulator represents a powerful tool. In this paper, the SAVERS simulator, that was developed and validated on ground based and airborne data, is now upgraded to take account for the important role of the topography in the satellite acquisitions. The Delay Doppler Maps acquired by satellite sensors show a clear topography effect.

Landfill monitoring requires knowledge of the landfill body's volumetric characteristics at frequent time intervals. In addition to this three-dimensional information, other information may also be useful, such as surface temperature, which may be influenced by the chemical, physical and geotechnical processes inherent in the development of the landfill itself. On the other hand, the logistical and environmental conditions normally encountered at such sites make it difficult to use traditional geomatic techniques.

The drones allow to acquire geometric and thematic information quickly and with considerable operational advantages in close range surveys. The lower flight altitude, and the possibility of rapidly replacing the sensors between panchromatic, multispectral and thermal sensors allow the detection of useful characteristics for monitoring and control, even periodically, of areas with reduced size.