Some of our projects: efficient space-based radar scene generation, bistatic radar simulations of terrain; ultra-wideband radar system design and analysis; filter design research for robust VHF/UHF tactical communications in dense multipath environments; antenna systems design for military and commercial shipboard and fixed station applications; software for high-fidelity prediction of radar target signatures in terrain clutter; and exploratory research on algorithms for the analysis of electromagnetic coupling of targets to background clutter for FOPEN radar applications.
Some key technology areas:
In some early terrain modeling work, Polatin Corporation generated HRR ground clutter simulation data and analysis. This work took Polatin’s early radar clutter models and integrated them into a physics-based HRR clutter cell simulator. The simulator was used to generate probability density functions and statistical parameters for the HRR, I and Q channel return from deciduous tree canopies and also yielded an accurate estimate of the sensor’s decorrelation bandwidth.
Also, in 2002, Polatin Corporation began work on physics-based, bistatic radar, terrain model development. During the course of this R&D project Polatin formulated, developed, and provided preliminary validation for its bistatic terrain modeling approach. We have implemented these models and algorithms as simulator codes that have subsequently been used to synthesize high-fidelity scattering data for important types of bare and foliated terrain. We have also demonstrated that flexible, accurate, bistatic scattering models and methodology can be developed for use in advanced radar signature prediction software.
Polatin Corporation is currently developing highly efficient computational methodologies for generating variable fidelity, GMTI radar scenes. The intent of this work is to support DoD distributed simulations for wargaming applications; the scene generation capability requirement is for regions consisting of millions of square kilometers to tens of square kilometers and with resolutions from 1 meter to 1 km.
Polatin is also currently tasked with developing a full-featured, GUI-driven, physics-based, bistatic terrain simulator that incorporates inputs from DTED, USGS land-use/land-cover, VMap, and other relevant database sources.
Polatin Corporation has developed exploratory antenna design concepts for shipboard and fixed station VHF and UHF emergency communications for the Coast Guard’s National Distress Response System modernization program as the manager of a major prime contractor’s Phase I team. Polatin has also developed shipboard and fixed station antenna designs for other private companies.
In 2001, Polatin investigated near-field coupling of ground targets to background clutter at VHF and UHF frequencies. During the course of that project a low-frequency simulator was developed for analyzing the frequency-domain, time-domain and time-frequency signature of targets electromagnetically coupled to tree clutter in the regime from 30 to 900 MHz. In further RF terrain simulation work Polatin Corporation developed filtering methodologies for mitigation of multipath interference associated with tactical radio operations in dense foliage cover. In the course of this work, a mobile tactical radio simulator was developed for frequency-hopped, VHF/UHF LOS communications, and the simulator was then used to successfully demonstrate proof-of-concept for a digital multipath filter suitable for implementation with the next generation of military and commercial software radios.
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