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Physisch laboratorium TNO (author), de Loor, G.P. (author), Hoogeboom, P. (author)
Een overzicht van het onderzoek dat op het terrein van de aardobservatie met behulp van radar in Nederland wordt verricht voor toepassing op land en op zee. Dit onderzoek vindt plaats onder auspiciën van de interdepartementale Begeleidings Commissie Remote Sensing (BCRS) en geschiedt in interdisciplinaire werkgroepen. Hierbij wordt zowel het...
article 1984
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Hoogeboom, P. (author), Physisch Laboratorium TNO (author)
Studies on microwave surface scattering in The Netherlands have indicated the need for accurate radar systems for applications in remote sensing. An SLAR system with digital recording was developed and is now being used for several programmes. This system was designed with special attention to speckle reduction and system accuracy. The digital...
article 1983
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Physisch Laboratorium TNO (author), de Loor, G.P. (author)
Measurements of average normalized backscatter made from a platform in the North Sea 10 km off the Dutch coast are reported here. The measurements provide information on the dependency of X band backscatter on grazing angle, wind speed, and look direction. It has been found that for grazing angles under 50o the dependency of backscatter on wind...
article 1983
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Physisch laboratorium TNO (author), de Loor, G.P. (author)
Earth observation satellites: datastream and data interpretation. A short and very general description is given of the earth observation (remote sensing) satellites now in use (or used) for the three windows in the atmosphere, as LANDSAT, the HCMM, and SEASAT. Their development is detemined to a high degree by the experiences obtained in aerial...
article 1982
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Physisch Laboratorium TNO (author), de Loor, G.P. (author)
In microwave remote sensing, knowledge of the dielectric properties of the materials observed (vegetation, soils) is important for the interpretation of the recorded reflection or emission and for the design of models for this reflection or emission. Although there exists no simple law which describes the properties of a heterogeneous system...
conference paper 1982
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Hoogeboom, P. (author), Physisch Laboratorium TNO (author)
Studies on microwave surface scattering in The Netherlands have indicated the need of accurate radar systems for applications in remote sensing. A SLAR system with digital recording was developed and is now being used for several programs. This system was designed with special attention for speckle reduction and system accuracy. The digital data...
conference paper 1981
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Physisch Laboratorium TNO (author), Dekker, H. (author)
In this thesis it is shown how to solve the master equation for a Markov process including a critical pointby means of successive approximations in terms of a small parameter.A critical point occurs if, by adjusting an externally controlled quantity, the system shows a transition from normal monostableto bistablebehaviour. Examples of the...
doctoral thesis 1980
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Physisch laboratorium TNO (author), de Loor, G.P. (author)
article 1980
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Physisch Laboratorium TNO (author), Schippers, P. (author)
conference paper 1979
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Physisch Laboratorium TNO (author), Meinardi, J.J. (author)
'War games' (oorlogsspelen) zijn al eeuwen in gebruik. Prins Maurits van Oranje-Nassau gebruikte een zandbak met tinnen soldaatjes. Door de komst van de computer, aldus Ir. J. J. Meinardi, medewerker van het Physisch Laboratorium TNO, is 'wargaming' een uiterst belangrijk en interessant stuk gereedschap geworden voor de militaire leiding. Met...
article 1978
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Physisch Laboratorium TNO (author), Rijsdijk, F.B. (author), van der Spek, G.A. (author)
For a planar-array antenna with a monopulse feed horn, this study describes a simple algorithm for the determination of the direction of target echoes. Antenna pattern measurements of the array indicate that the direction sines of a received wavefront can be independently obtained with one simple relation between a normalized difference channel...
article 1978
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Physisch Laboratorium TNO (author), Rijnja, H.A.J. (author)
Because the speed of sound under water depends on the pressure, a sinusoidal pressure wave with a high amplitude will be distorted while it propagates through the water. When two strong sound waves with different frequencies ìnteract, mutual modulation occurs, causing sum- and difference frequencies. Because the absorption of sound energy under...
article 1977
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Physisch Laboratorium TNO (author), van Batenburg, M.W. (author)
A short historical survey is given on the development of underwater acoustics starting with the experiments of Beudant in 1807, till the end of the first world war. Passive devices are not discussed.
article 1977
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Physisch laboratorium TNO (author), de Loor, G.P. (author)
article 1977
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Physisch laboratorium TNO (author), Navarro, A.M. (author)
This paper describes a tracking procedure for the FUCAS-experimental multi purpose phased array system. A phased array systems is always very complex. Upto this moment there are just a few systems, the results of experiments with those systems are not yet available. FUCAS is developed to acquire experience and to get insight in the problems, the...
conference paper 1977
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Physisch Laboratorium TNO (author), van Batenburg, M.W. (author), van Soest, J.L. (author)
Gedenkboek ter gelegenheid van het vijftigjarig jubileum.
book 1977
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Dekker, H. (author), Physisch Laboratorium TNO (author)
In this paper the possibility of cooperative effects in Cerenkov radiation will be discussed theoretically. A crude sketch is given of a possible capture of photons from a part of the rather broadband Cerenkov spectrum in a high quality resonator. We then introduce a classical Markoffian master equation for the system, accounting for Cerenkov...
article 1976
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Physisch laboratorium TNO (author), de Loor, G.P. (author)
Als gevolg van het militaire onderzoek van verkenningsmiddelen zijn er de laatste jaren een aantal gehe nieuwe apparaten verschenen die het mogelijk maken om naast de luchtfotografie het aardoppervlak waar te nemen en af te beelden. Niet alleen werd het beschikbare golflengtegebied sterk uitgebreid tot ver buiten de grenzen van het zichtbare...
article 1975
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Physisch laboratorium TNO (author), Boden, J.A. (author)
A survey is given of the most common types of coherent optical correlators, which are classified as spatial plane correlators, frequency plane correlators and special reference correlators. Only the spatial plane correlators are dealt with rather thoroughly. Basic principles, some special features, advantages and disadvantages mostly are given...
bookPart 1974
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Physisch laboratorium TNO (author), Bakker, T. (author)
In dit artikel wordt eerst het principe van de laser kort toegelicht en worden de fundamentele eigenschappen van laserstraling beschreven. Na een korte beschrijving van enkele uitvoeringsvormen worden de toepassingsmogelijkheden voor militaire doeleinden aangegeven.
article 1973
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