In the field of maritime surveillance, global navigation satellite system (GNSS)-based passive radar has proven its potential for moving target detection (MTD), localization, and velocity estimation. The next stage is to investigate possibility obtaining image ship recognition. However, limited signal power budget GNSS prevents conventional inverse synthetic aperture technique that based on rot...

Collocated active and passive remote sensing measurements collected at U.S. Department of Energy Atmospheric Radiation Measurement Program sites enable simultaneous retrieval of cloud and precipitation properties and air motion. Previous studies indicate the parameters of a bimodal cloud particle size distribution can be effectively constrained using a combination of passive microwave radiomete...

The NASA Soil Moisture Active and Passive (SMAP) mission is dedicated to measurement of global soil moisture and boreal land surface freeze/thaw state [1]. The satellite will carry radar (active) and radiometer (passive) L-band instruments that will perform simultaneous and coincident measurements of the Earth’s surface. The combination of data from the two instruments will allow unprecedented ...

This paper explores the synergetics of passive and active microwave remote sensing to determine soil moisture under a corn canopy. An experiment has been performed at Alabama A&M Winfield A. Thomas Agricultural Research Station near Huntsville, Alabama in June, 1998. The fields were observed with a truck-mounted L-, Cand X-band polarimetric radar and a second truck-mounted Land S-band radiomete...

High-accuracy pulse repetition interval (PRI) estimation is meaningful for passive sensors to identify radar emitters. This paper considers the problem of estimating the PRIs of motionless radars in moving passive sensor systems. A modified method which based on observation calibration is proposed. This method can efficiently compensate the estimation bias induced by model mismatch, through cal...

In this paper, a new concept for increasing the airport security is proposed. The proposed innovative system is studied and developed in the ATOM (Airport detection and Tracking Of dangerous Materials by active and passive sensors arrays) project, funded by the European Commission. It foresees the definition of a multi-sensor approach that integrates active and passive radar sensors with curren...

Slated for launch in 2015, the NASA Soil Moisture Active/Passive mission represents a significant advance in our ability to globally observe time and space variations in surface soil moisture fields. The SMAP mission concept is based on the integrated use of L-band active radar and passive radiometry measurements to optimize both the accuracy and resolution of remotelysensed surface soil moistu...