Ursit (Bulgaria)

In this paper we analyze the power budget and calculate signal to noise ratio (SNR) and radar cross section (RCS) for different ground targets using a forward scattering radar (FSR) system, which consists of a transmitter mounted on a satellite of GPS and a receiver located on the Earth's surface. The FSR is a specific bistatic radar system where the bistatic angle is near 180o, and the target is located near the transmitter-receiver baseline. Theoretical and numerical calculations of SNR and RCS are presented for different ground targets when the GPS L1 signal is transmitted by satellites. The SNR and RCS are also estimated by using real records of the GPS signal shadows from different targets. The obtained numerical and experimental results are analyzed and discussed.

Bulgaria faced and still is facing many challenges in the accession process to the EU. Free movement of capital, and especially the development of the land market, is one of them. Although the progress is made, the market is still developing and the land prices are still below the average prices in EU. There are different reasons for this: very fragmented land after the restitution process, chaotic transactions, lack of bank credits for agricultural purposes, unrealistic expectations after the accession to the EU, etc. The land lease continues to be the preferred way for land cultivation instead of buying of land. All those problems are studied in the current paper. A concept for e-service that could contribute to solving the problems is introduced; relevant e-services are summarized and a particular solution is presented that uses results of the eTen project Bizmap.net. It is described how this solution could be used in the Bulgarian land market.