A growing trend in Satellite communication (Satcom) and Radar systems in the aerospace and defense market is the need for increased signal and analysis bandwidth and processing gain. Satcom systems are being driven by demands for increased data rates, while modern Radar systems require more processing gain to improve range resolution, which in turn drives wider modulation bandwidths. Modern Rad...

Department of Chemical System Engineerin Bunkyo-ku, Tokyo 113-8656, Japan. E-ma +81-3-5841-8838; Tel: +81-3-5841-1148 Japan Technological Research Association Process (ARPChem), 5-1-5 Kashiwanoha, Ka National Institute of Advanced Industrial Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 3 Department of Chemical System Engine Kashiwanoha, Kashiwa-shi, Chiba 277-8589 † Electronic supplementary infor...

We show that for any N > 0 there exists a natural even n > N such that the discriminant of moduli of K3 surfaces of the degree n is not equal to the set of zeros of any automorphic form on the corresponding IV type domain. We give the necessary condition on a ”condition S ⊂ LK3 on Picard lattice of K3” for the corresponding moduli MS⊂LK3 of K3 to have the discriminant which is equal to the set ...

Emergency situations require reliable broadband communications systems which are able to transmit relevant information from the disaster site to the decision makers and send feedback to first responders regarding potential dangers or decisions. A key factor in designing a robust communications system with applications to emergency response is the development of a quick, easily deployable and mo...

The research described in this publication was carried out by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. © 2010 California Institute of Technology. Government sponsorship acknowledged. There is considerable interest in determining whether suitably modified versions of existing 34-m antennas at NASA’...

India is planning to conduct its own Ka band propagation studies experiment in order to validate the existing ITU model and to develop a more accurate prediction model for its unique climate condition for guaranteed QoS. This experiment involves measurement of signal attenuation due to rain and development of appropriate mathematical propagation models. This requires a ground receiver to receiv...

The Ku-band Polarization Identifier (KUPID) will integrate a very low noise 12-18 GHz, correlation polarimeter onto the Crawford Hill seven meter, millimeter-wave antenna. The primary components of the polarimeter will be built at the University of Miami and other key components, including the microwave horn and data acquisition system will be built at the University of Chicago and Princeton Un...

This paper investigates the image-based characterization of the land mobile satellite (LMS) channel. For a comprehensive multi-satellite model, a traditional measurementbased approach is not feasible due to the lack of available satellites at all possible orbital positions and the drawbacks of the measurement system when a high gain tracking antenna is involved (e.g. Ka/Ku band). To overcome th...

—W-band (75-110 GHz) is proposed nowadays as a valuable alternative to intensively-exploited Ku and Ka bands for high-speed transmission over satellite networks. In such a framework, some experiments are being carried out, which are targeted to verify the feasibility of exploitation of W-band for broadband service deployment. From a theoretical viewpoint, the large bandwidth availability and th...

An attenuation-based method to retrieve vertical profiles of rainfall rate from vertically pointing Ka-band radar measurements has been refined and adjusted for use with the U.S. Department of Energy’s cloud radars deployed at multiple Atmospheric Radiation Program (ARM) test bed sites. This method takes advantage of the linear relationship between the rainfall rate and the attenuation coeffici...