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TNO Fysisch en Elektronisch Laboratorium (author), van Rossum, W.L. (author), van Halsema, D. (author), Otten, M.P.G. (author), Hoogeboom, P. (author), Visser, J.M.P.C.M. (author), Pouwels, H. (author)After the completion of the PHARUS polarimetric phased array SAR, an extensive prograrnme of data acquisition was carried out under the PHARUS Familiarisation Programme, a project for the National Remote Sensing Board (BCRS). The Familiarisation Programme has been aimed at the acquisition of PHARUS data to demonstrate the potential of the PHARUS...conference paper 1999
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TNO Fysisch en Elektronisch Laboratorium (author), Ritt-Fischer, M.R. (author), van Halsema, D. (author), Pouwels, H. (author), Wensink, G.J. (author)ln recent years PHARUS, a phased array synthetic aperture radar airborne instrument, has been developed by a Dutch team of institutes. Now that the experimental value for PHARUS has been demonstrated, it is important to investigate the commercial potential of this instrument in an end-to-end system for operational services. ln the presented...report 1998
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Vermeulen, B.C.B. (author), Koomen, P.J. (author), Hoogeboom, P. (author), Snoeij, P. (author), Pouwels, H. (author), TNO Fysisch en Elektronisch Laboratorium (author)The use of distributed power in a, on a phased array antenna based, SAR system offers new possibilities for the system operation. As a preparation for future spaceborne SAR systems using solid state transmitters with electronically steerable phased array antenna, the PHARUS system has been constructed. The system is installed on a Cessna...conference paper 1996
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Greidanus, H.S.F. (author), Hoogeboom, P. (author), Koomen, P.J. (author), Snoeij, P. (author), Pouwels, H. (author), IEEE - Institute of Electrical and Electronics Engineers (author)PHARUS is an airborne fully polarimetric C band SAR. It uses a compact phased array antenna with electronic beam steering. Its design provides for a flexible and robust system concept, suited for operational use on small aircraft. PHARUS was developed in The Netherlands to cater for both the military and civil markets. Its development was...conference paper 1996
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Snoeij, P. (author), Pouwels, H. (author), Koomen, P.J. (author), Hoogeboom, P. (author), TNO Fysisch en Elektronisch Laboratorium (author)The PHARUS system is an example of a high resolution aircraft SAR sensor. Specially the PHARUS system, due to the flexibility of the operating modes, is a candidate to be used complementary with present and planned spacebome systems. The system can also be used as a demonstration system for future spacebome systems such as ESA's AS AR. This...conference paper 1996
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Vermeulen, B.C.B. (author), Paquay, M.H.A. (author), Koomen, P.J. (author), Hoogeboom, P. (author), Snoeij, P. (author), Pouwels, H. (author), TNO Fysisch en Elektronisch Laboratorium (author)In the Netherlands, a Polarimetrie C-band aircraft SAR (Synthetic Aperture Radar) has been developed. The project is called PHARUS, an acronym for Phased Array Universal SAR. This instrument serves remote sensing applications. The antenna system contains 48 modules (expandable to 96). A module is composed of a Transmit/Receive (T/R) module, a...conference paper 1996
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Snoeij, P. (author), Pouwels, H. (author), Koomen, P.J. (author), Vermeulen, B.C.B. (author), Hoogeboom, P. (author), TNO Fysisch en Elektronisch Laboratorium (author)A polarimetric C-band airborne SAR has been developed in the Netherlands. The system makes use of a phased array antenna with solid state amplifiers. The project consists of two phases, a definition phase and a realization phase. The definition phase consisted of the actual realization of a SAR research system, which made its first successful...conference paper 1996
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TNO Fysisch en Elektronisch Laboratorium (author), Paquay, M.H.A. (author), Vermeulen, B.C.B. (author), Koomen, P.J. (author), Hoogeboom, P. (author), Snoeij, P. (author), Pouwels, H. (author)In the Netherlands, a polarimetric C-band aircraft SAR (Synthetic Aperture Radar) has been developed. The project is called PHARUS, an acronm for PHased ARray Universal SAR. This instrument serves remote sensing applications. The antenna system contains 48 active modules (expandable to 96). A module is composed of a Transmit/Receive section, a...conference paper 1996
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- TNO Fysisch en Elektronisch Laboratorium (author), Snoeij, P. (author), Pouwels, H. (author), Paquay, M.H.A. (author), Koomen, P.J. (author), Hoogeboom, P. (author) conference paper 1996
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Snoeij, P. (author), Pouwels, H. (author), Hoogeboom, P. (author), Hoeke, B. (author)Groundbased scatterometry in The Netherlands has proven to be essential in studying the scattering of microwaves by vegetation and sea. The results of groundbased measurements were among others used for the development of suitable models and for the design of a digital and calibrated airborne X-band SLAR system. Among others the multitemporal...conference paper 1996
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Snoeij, P. (author), Hoogeboom, P. (author), Koomen, P.J. (author), Vermeulen, B.C.B. (author), Pouwels, H. (author)The PHARUS system uses a phased array antenna with solid state amplifiers. The project consisted of two phases, a definition phase and a realization phase. The definition phase consisted of the actual realization of a SAR research system called PHARS, which made its first successful testflight in November 1990. The research system is based on...conference paper 1996
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Snoeij, P. (author), Hoogeboom, P. (author), Koomen, P.J. (author), Vermeulen, B.C.B. (author), Paquay, M.H.A. (author), Pouwels, H. (author)Purpose of calibration is to get an accurate and Precise instrument. The precision of the instrument can be determined using internal calibration, while the accuracy is denoted with absolute calibration. With internal calibration only the instrument is considered. Because of practical considerations the antenna is usually discarded in this type...conference paper 1994
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Hoogeboom, P. (author), Koomen, P.J. (author), Snoeij, P. (author), Pouwels, H. (author)The PHARUS project (PHARUS stands for Phased Array Universal SAR) aims for a polarimetric C-band aircraft SAR that will be finalized in 1994. The system will make use of a phased array antenna with solid state amplifiers. The project consists of two phases, a definition phase and a realization phase. The definition phase was intended to increase...conference paper 1992
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Pouwels, H. (author), Hoogeboom, P. (author), Koomen, P.J. (author), Snoeij, P. (author)The Dutch PHARUS project aims for the developrlenÈ of a polarimetric C-band aircraft SAR, to be finalized in 1994. The PHARUS systen consists of three subsystens: the radar, the subsystem for the onboard data processing and recording and the ground-based subsystem for SAR processing. PHARUS is a very flexible system with numerous operating modes...conference paper 1992
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Snoeij, P. (author), Pouwels, H. (author), Koomen, P.J. (author), Hoogeboom, P. (author), Fysisch en Elektronisch Laboratorium TNO (author)Since many years ground-based scatterometers (X and Q band) and a digital SLAR system (X-band), are used in studying the microwave scattering of vegetation, forests, sea and other targets in the Netherlands. Recently an airborne scatterometer system operating at six frequencies simuItaneously between 1 and 18 GHz has been added to the remote...conference paper 1990
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Hoogeboom, P. (author), Koomen, P.J. (author), Pouwels, H. (author), Snoeij, P. (author)In The Netherlands a plan to design aircraft and build a polarimetric C-band SAR system of a novel design, called PHARUS (PHased Array Universal SAR) is carried out by three institutes. These institutes are the Physics and Electronics Laboratory TNO in The Hague (prime contractor and project management), The National Aerospace Laboratory NLR in...conference paper 1990
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Fysisch en Elektronisch Laboratorium TNO (author), Snoeij, P (author), Hoogeboom, P. (author), Koomen, P. (author), Pouwels, H. (author)For the study of microwave scattering of vegetation, forests, sea and other targets groundbased and airborne scatterometers and a digital SLAR system (X-band) are used since many years in The Netherlands. All these systems are absolutely calibrated. The experience gained with building radar remote sensing systems led to the development of a...conference paper 1990
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Hoogeboom, P. (author), Koomen, P.J. (author), Otten, M.P.G. (author), Pouwels, H. (author), Snoeij, P. (author)A few years ago three institutes in the Netherlands developed a plan to design and build a polarimetric C-band aircraft SAR system of a novel design, called PHARUS (PHased Array Universal SAR), meant as a replacement for our current digital SLAR system. These institutes are the Physics and Electronics Laboratory TNO in The Hague (prime...conference paper 1989
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- Fysisch en Elektronisch Laboratorium TNO (author), Vogelzang, J. (author), Wensink, G.J. (author), de Loor, G.P. (author), Peters, H.C. (author), Pouwels, H. (author), van Gein, W.A. (author) report 1989