Home Articles Large Format Digital Line Scanners

Large Format Digital Line Scanners

 

Harsha Vardhan
GIS Development

Abstract
High Resolution Stereo Camera (HRSC-AX)
The multi-spectral and multi-stereo HRSC airborne pushbroom scanner provides data for generation of digital ortho-images and digital surface models with an accuracy of 10 to 20 cm. Depending on the particular model HRSC-A, HRSC-AX150 or HRSC- AX047 different operational parameters can be achieved to suite various applications. The first experiments with an airborne version of HRSC-A were carried out in February 1997.

The HRSC-A camera technology was originally developed for the Russian Mars96 space mission by the Institute of Planetary Exploration of the German Space Centre (DLR)in cooperation with industrial partners (EADS Astrium, Lewicki Microelectronic GmbH and Jena-Optronik GmbH). The model was later modified to be used on ESA's Mars Express mission. It was later modified for airborne remote sensing(HRSC-AX).
HRSC-AX/W is a new generation Airborne remote sensing camera with extended field of view. For Automated Data Production, DLR has developed a software along with Technical University (TU) of Berlin. The data products are mosaics of 8 or 12-bit panchromatic nadir data having 15,25 or 50cm spatial resolution; 8-bit multi-spectral data(RGB & IR) of 30,50 or 100cm spatial resolution; and 16 bit DSM or DTM data.

 

In the year 2000, Starlabo Corporation , Tokyo designed a new airborne digital imaging system, the Three-Line-Scanner (TLS) system – STARIMAGER, jointly with the Institute of Industrial Science, University of Tokyo. The TLS system was originally designed to record linear features (roads, rivers, railways, power lines, etc.) only, but later tests also revealed the suitability for general mapping and GIS-related applications. The data processing chain consists of User interface and measurement system, Triangulation, Image Rectification, DSM/ DTM generation, Ortho-image generation, 3D object extraction and modelling etc.
 

Jena Airborne Scanner (JAS -150)

  Based on Jena-Optronik developments in the area of multi-line CCD sensors, the company has developed the push broom scanner JAS 150 for Photogrammetry and Remote Sensing. The JAS 150 is usable with common types of stabilization platforms like T-AS from Zeiss, PAV30 from Leica, and the common SM-2000 and its successor GSM-3000. Further it is possible to use different Inertial Navigation Systems (INS) like IGI-AEROcontrol and APPLANIX-POS AV510.

The JAS camera comes with the software suite JenaStereo that runs wither on windows or Linux offers raw data processing and an interface to SOCET-SET. Customer can integrate its own modules into the workflow. The main features of the software include Adjust Point Triangulation(APT), Automatic Terrain Extraction (ATE), Ortho Rectification and Mosaicing(ORM).