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Marijnissen, R.J.C. (author), Aarninkhof, S.G.J. (author)The goal of the study is to map the changes of marsh extent and topography on both Sturgeon Bank and Westham Island between 1980 and now. The study will look for a correlation between the recession and the possible loss of sediment from the banks. If a sediment deficit is a (major) contributor of marsh recession within the...report 2017
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Delrieu, G. (author)This report summarizes the work done by the meteorological team of the TU Dresden within the FLOODsite Task 15 “Radar and satellite observation of storm rainfall”. The aim of this Task was the development of a radar and satellite Structured Algorithm System (SAS) for quantitative precipitation estimation (QPE) at the space and timescales of...report 2008
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van Dorp, A.L.C. (author)ARTEMIS (Africa Real-Time Environmental Monitoring Information System) is used by FAQ (Food and Agriculture Organisation of the United Nations) to support both its internal prograimnes on early warning and food security and desert locust control as well as developing countries in Africa by processing image information originating from the...report 1994
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Dekker, G.J. (author), Hameetman, G.J. (author)Bij het ontwikkelen van de standregelprogrammatuur voor de Italiaanse satelliet SAX is gebruik gemaakt van een aantal CASE tools. Naast een beschrijving van de standregelprogrammatuur, met als hoofdeisen een hoge mate van bedrijfszekerheid en een hoge flexibiliteit, worden de ontwikkelsituatie en de ontwikkelomgeving beschreven. Geschetst wordt...report 1993
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Guelman, M. (author)The present report contains a study on the simulation of interactive fluid spacecraft dynamics. The equations of motion of the two dimensional full tank case as well as the corresponding finite different discretized equations are presented. The numerical solution of this system is studied. Results are presented for a number of cases. Based on...report 1993
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van Ingen Schenau, H.A. (author), Spaa, J. (author)This paper describes aspects of system design applied to the ARTEMIS environmental monitoring system of the Food and Agriculture Organization (FAO) of the United Nations. The design aspects are derived from characteristics of the monitoring function and are based on methods of rainfall and vegetation monitoring from satellite observations which...report 1992
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Pietersen, O.B.M. (author)Results are given of measurements with two hand-held GPS C/A- code SPS (Standard Positioning Service) receivers at thirty locations in Finland, Norway and Sweden. Comparison is made between computed positions by the receivers and positions on geographic maps. It is concluded that both receivers have pros en cons. A combination of the...report 1991
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Moek, G. (author)In this report, the application of estimation theory to three problems from aerospace research is described. The applications considered deal with spacecraft attitude estimation, software reliability modelling and estimation, and with a satellite-based navigation algorithm. Maximum likelihood estimation is used in the software reliability case...report 1991
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- Ambrosius, B.A.C. (author), Bax, J.A. (author), van Gelder, B.H.W. (author), van Loon, D.L.F. (author), Noomen, R. (author), Verheijen, A.J.M. (author), Vermaat, E. (author), Wakker, K.F. (author) report 1991
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Looyen, W.J. (author)Working with Remote Sensing data can be generalized into four categories: - registration - processing - interpretation - presentation. A short overview of these four categories will be given. Emphasis will be put on the Dutch airborne multichannel pushbroom scanner CAESAR showing specific geodetic points of interest in working with Remote...report 1989
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van der Laan, F.B. (author), Meijer, P.G. (author)This report gives the results of a study carried out in the Remote Sensing Department of the National Aerospace Laboratory (NLR) in The Netherlands concerning the updating of land use on topographic maps using remote sensing information. It was found that SPOT multispectral imagery is less suitable for land use classification purposes than...report 1989
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Roefs, H.F.A. (author), Monkel, A. (author)Project CADISS has produced an elegant breadboard of a system for compression (and -if required- decompression) of signals generated by imaging sensors on-board scientific satellites. The performance, specifications and physical characteristics of CADISS are the result of trade-offs on function (algorithms), technology, through-put speed and...report 1987
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van Swol, R.W. (author)Within the framework of the National Remote Sensing Programme and under contract with the Netherlands Remote Sensing Board (BCRS), the National Aerospace Laboratory NLR has carried out a Phase-A/B study of a national ERS-1 data and information centre. The first European Remote Sensing Satellite (ERS-1) is due to be launched by the European Space...report 1987
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de Reus, N.M. (author), Moek, G. (author), Olsder, G.J. (author)A worldwide navigation system called NAVSAT is discussed. This positioning system is based on satellites which broadcast information which can be used by receivers of this Information to estimate their position. The motion of the users is modelled by splines. The estimation procedure is based on the extended Kalman filter approach.report 1987
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Hogendoorn, R.A. (author)Non-specialist users of data compression often encounter difficulties with the selection of an algorithm, suited for their application. This report tries to facilitate this task by providing the necessary information about the algorithms. Four established, at the National Aerospace Laboratory available algorithms were selected for this study: -...report 1986
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Versteeg, M.H.J.B. (author)This report describes the results of a feasibility study into some aspects of a proposed METEOSAT image data compression unit. The study was performed to support the preparation of a proposal for ESOC. For the considered algorithms (ESTEC 1 & MEANDER 1) an estimate of the needed processing power based on the 68000 instruction set was made. This...report 1986
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de Pagter, P.J. (author), Renes, J.J. (author)This report describes the results of a feasibility study on image data compression using spline approximation and image segmentation, with emphasis on earth observation applications. The main subjects dealt with, are: the data compression method, implementation aspects, the test software and test results. It appears that a reduction factor of 5...report 1985
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Simons, H.J. (author)This report describes the most relevant block- and convolutional codes to be used in satellite communication systems. Design trade-offs are given for the choice of coding techniques in SCPC, TDMA and SS-TDMA communication system,report 1985
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Joosten, L.J.M. (author), Wakker, K.F. (author)On the proposed satellite-based navigation system NAVSAT, a study has been performed concerning the characteristics of the control segment. Starting from the outcome of earlier preliminary studies of ESA, this study shows that the concept is feasible.report 1985
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Vogels, M.E.S. (author)One of the experiments performed on board Spacelab, involves a partially filled annular cylinder which is subjected to prescribed motions (Ref. 1). The interest in this configuration arises from its practical use; for instance, the coolant in IRAS was stored in an annulus-like tank. In this report, a mathematical model for the transient liquid...report 1984