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Now showing items 11-20 of 37
Comparison of Measurements with Prediction Methods for Propagation by diffraction at88 - 108 MHz
(2004)
Three methods for predicting attenuation due to diffraction are tested against a large database of 115 614 measurement points, representing 115 614 different path profiles of 100-m horizontal resolution, and vertical root ...
Underwater Acoustic Communications: Long-Term Test of Turbo Equalization in Shallow Water
(2008)
Acoustic telemetry sea trials lasting for three months with experiment periods of 7 h have been carried out, using a turbo receiver. The communication channel is shallow; the depth is approximately 10 m, and the range is ...
Using web services to realize service oriented architecture in military communication networks
(2007)
The principles of network enabled capability highlight the need for seamless information exchange. The service oriented architectural paradigm has been recognized as one of the key enablers to achieve this. At the same ...
Survey of Key Management in Ad Hoc Networks
(2006)
The wireless and dynamic nature of mobile ad hoc networks (MANETs) leaves them more vulnerable to security attacks than their wired counterparts. The nodes act both as routers and as communication end points. This makes ...
Mass analysis of charged aerosol particles in NLC and PMSE during the ECOMA/MASS campaign
(2009)
MASS (Mesospheric Aerosol Sampling Spectrometer) is a multichannel mass spectrometer for charged aerosol particles, which was flown from the Andoya Rocket Range, Norway, through NLC and PMSE on 3 August 2007 and through ...
First in situ measurement of the vertical distribution of ice volume in a mesospheric ice cloud during the ECOMA/MASS rocket-campaign
(2009)
We present in situ observations of mesospheric ice particles with a new particle detector which combines a classical Faraday cup with the active photoionization of particles and subsequent detection of photoelectrons. Our ...
High resolution spaceborne INSAR simulation with extended scenes
(2005)
The Inverse–EETF4 (Extended Exact Transfer Function 4th order) is used to simulate
raw data and a complete INSAR processing chain for high squint has been developed.
Phase differences for a spaceborne INSAR geometry are ...
Spaceborne Bistatic SAR Processing Using the EETF4 Algorithm
(2009)
In this letter, the fourth-order extended exact transfer function (EETF4) is adapted for spaceborne bistatic synthetic aperture radar (SAR) processing. The problems with high squint and large bistatic Doppler centroid ...
ERS tandem InSAR processing for DEM generation, glacier motion estimation and coherence analysis on Svalbard
(2003)
This paper describes the unique InSAR (Interferometric Synthetic Aperture Radar) processing algorithms at Norwegian Defence Research Establishment (FFI) and how ERS (European Remote Sensing Satellite) tandem data are used ...