Two R factors, one (R15) conferring resistance to streptomycin and sulfonamide (SM(r)SU(r)) and the other (222/R3) to streptomycin, sulfonamide, and chloramphenicol (SM(r)SU(r)CM(r)), were transferred to a Proteus mirabilis strain, and deoxyribonucleic acid (DNA) extracted from these strains was subjected to density-gradient centrifugation. R15-DNA formed a single satellite band at a density of...

Land mobile satellite communication systems at Ka/K band (30/20 GHz) are attracting more and more attention to researchers because of its frequency band availability and the possibility of using small earth stations and satellite antennas for the systems. However, the Ka/K-band communications also give significant challenges in the system design due to severe channel impairments expected from t...

Satellite jitter has become a more and more important factor which affects the quality of imagery products with development of the high resolution satellite. This paper focused on analyzing the impact on multi-spectral image caused by satellite jitter and proposed a jitter detection and compensation method to improve the band-to-band registration efficiently when jitter exists without observati...

In today‘s wireless communication environment, the Radio Frequency spectrum is occupied for different purposes like cellular, Television, military, emergency or satellite communication. The frequency spectrum used for cellular communication is getting over crowded with increasing number of subscribers and demand for high data rate text or video transmission, but the frequency spectrum in other ...

AbstractThis paper represents the design of microstrip patch antenna for X-band applications. This antenna can be designed at a single layer single patch four band, E-shape notch and symmetrically H-shape slots loaded compact antenna. The designed antenna can be used for Search and Rescue Radar Transponders (SART) and in Civil, Military Navigation Radars (MNR). The four band antenna is achieved...

This paper addresses the cognitive Geostationary Orbit (GSO) satellite uplink where satellite terminals reuse frequency bands of FixedService (FS) terrestrial microwave links which are the incumbent users in the Ka 27.5-29.5 GHz band. In the scenario considered herein, the transmitted power of the cognitive satellite user has to ensure that the interference impact on potentially present FS link...

TanDEM-X is a German Public Private Partnership project between DLR and EADS Astrium for a novel satellite constellation based on TerraSAR-X with the goal to generate a global digital elevation model (DEM) according to the HRTI-3 standard, i.e. 10 m horizontal spacing and 1-2 meter vertical accuracy. TerraSAR-X is a civil German X-Band Synthetic Aperture Radar (SAR) satellite to be launched in ...

The National Institute of Information and Communications Technology (NICT) has been studying a new mobile communication system, named Satellite-Terrestrial Integrated Mobile Communication Systems (STICS)[1]. The STICS is a mobile phone system in which terrestrial mobile and satellite communication systems coexist, and is seamlessly integrated in the same frequency band. We aim for the realizati...

To meet an increasing demand for multimedia services and electronic connectivity across the world, satellite networks will play an indispensable role in the deployment of global networks. A number of satellite communication systems have been proposed using geosynchronous (GEO) satellites, medium earth orbit (MEO) and low earth orbit (LEO) constellations operating in the Ka-band and above. At th...