International cooperation and technology transfer

Fras, Mojca Kosmatin

Bibliographic data

Monograph

Persistent identifier:: 856490555

Author:: Fras, Mojca Kosmatin

Title:: International cooperation and technology transfer

Sub title:: Ljubljana, Slovenia, February 2 - 5, 2000 : proceedings of the workshop

Scope:: VI, 163 Seiten

Year of publication:: 2000

Place of publication:: London

Publisher of the original:: RICS Books

Identifier (digital):: 856490555

Illustration:: Illustrationen, Diagramme

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Monograph

Collection:: Earth sciences

Chapter

Title:: Digital Photogrammetric cameras: a new forward looking approach. P. Fricker, R. Sandau, P. Schreiber

Document type:: Monograph

Structure type:: Chapter

60 Digital Photogrammetric cameras: a new forward looking approach P. Flicker, R. Sandau, P. Schreiber LH Systems GmbH, Heinrich-Wild-Strasse, CH-9435 Switzerland, lastname@lh-systems.com KEYWORDS: digital sensor, digital camera, inertial measurement, digital photogrammetry, multispectral imagery. ABSTRACT Airborne digital sensors are already a reality. The transition from analytical to digital photogrammetry is well advanced and the dividing lines between photogrammetry and remote sensing grow increasingly blurred. One of the advantages of direct digital data capture in the air is the possibility of capturing multispectral data as well as panchromatic. Between modern film-based aerial mapping cameras with their extremely high resolution and, at the other end of the spectrum, the high-resolution satellite sensors, the market for new airborne devices is large and incontestable. Two competing technologies are available as the basis for airborne digital sensors - linear and matrix array CCDs. The price/performance ratio of the matrix array CCDs are insufficient to offer swath widths and resolutions comparable to film cameras. The most promising alternative are linear arrays, arranged in a triplet on the focal plane, one forward-, one nadir- and one backward-looking. When combined with GPS and INS systems, this configuration provides geometric performance that enables the same photogrammetric operations to be performed on the workstation as with scanned film imagery. Additionally, multispectral CCD lines can be placed on the focal plane, providing data unique for remote sensing due to the additional advantages of geometrically correct sensor modeling, stereo imagery and accurate geo-coding. A development project between LH Systems and the German Aerospace Centre has resulted in a functioning three-line sensor. An engineering model is being flown successfully and a production model is scheduled for market introduction in summer 2000 at the ISPRS congress in Amsterdam. 1. INTRODUCTION LH Systems’ announcement at the end of 1998 that an engineering model of their forthcoming airborne digital sensor had been flown successfully implies that a genuine alternative to the familiar aerial film camera is imminent. Except for producing stereoscopes, LH Systems and its predecessor Leica were never active in image interpretation. Yet this new sensor will have multispectral lines on the focal plane: it will be capable of generating precise, geometric information about the surface of the earth, but will also produce data amenable to proven remote sensing techniques. It will further soften the demarcation between photogrammetry and remote sensing and accelerate the decline of the photo laboratory, as digital image data can be transferred from the aircraft directly to the workstation. The debate about airborne versus spaceborne imagery continues. The highest resolution applications, with ground pixel sizes in the one centimetre to one decimetre level, are likely to remain the province of the film camera. Yet there is a huge, pent up demand for top quality, multispectral information in the gap between this and the one metre and coarser resolutions offered by the satellite operators. Both spaceborne and airborne

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