Special UNISPACE III volume

Marsteller, Deborah

Bibliographic data

Monograph

Persistent identifier:: 856485039

Author:: Marsteller, Deborah

Title:: Special UNISPACE III volume

Sub title:: including: ISPRS Workshop on "Resource Mapping from Space", ISPRS-EARSeL Workshop on "Remote Sensing for the Detection, Monitoring and Mitigation of Natural Disasters", ISPRS-NASA Seminar on "Environment and Remote Sensing for Sustainable Development", July 1999, Vienna, Austria

Scope:: IV, 170 Seiten

Year of publication:: 1999

Place of publication:: Coventry

Publisher of the original:: RICS Books

Identifier (digital):: 856485039

Illustration:: Illustrationen, Diagramme, Karten

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:: ISPRS Workshop on "Resource Mapping from Space"

Document type:: Monograph

Structure type:: Chapter

Chapter

Title:: PERSONAL GROUND STATION (PGS) SCANER - NETWORK FOR "RESURS-O" SATELLITE DATA ACQUISITION AND PROCESSING. NEW IMAGE NEURONET PROCESSING TECHNOLOGY FOR ENVIRONMENT MONITORING AND RESOURCE MAPPING. Dr. Vladimir E. Gershenzon

Document type:: Monograph

Structure type:: Chapter

UNISPACE III - ISPRS Workshop on “Resource Mapping from Space” 9:00 am-12:00 pm, 22 July 1999, VIC RoomB Vienna, Austria ISPRS support of a data base of images (ScanEx Catalogue Manager), transfonnation of the images into geographic projections (Image Transformer), thematic image processing (ScanEx NeRIS). 'Resurs Receiver’ application (Windows 95/NT). The application performs the following functions: tests the station, calculates a schedule of the satellite passages through the station visibility zone, controls the entire system and data stream during a reception sessioa and in particular: controls the antenna in accordance with a pre calculated track and measured input signal levels, locates bit sequences identifying raster image scan lines in the input stream, records properly aligned data to a hard disk, partly displays the data as an image in the application window, indicates the input signal level, indicates the station current status (time, an amount of recorded data, free disk space, status of a bit and frame synchronization, current antenna position, tracking errors, etc.), corrects the pre-calculated track in auto-track mode. All ballistic calculations (scheduling, antenna tracking) are carried out from standard NORAD-TLE orbital elements available in the Internet. Acceptable are elements of up to 10 days age. To calculate a schedule, a user must point out a TLE file name and time brackets for the schedule (up to 10 days) in the application options. The schedule is displayed in the application window. The user can edit it - select passages to receive, specify a transmission mode for every passage. The schedule can be saved as a text file and afterwards - until it is expired - can be loaded into the application from this file. After the application is loaded and the schedule is loaded into the application, the program permanently compares the current time with the start time of the closest passage. In the proper time, the application activates itself (if it is in a background by the moment) and starts the reception procedures: controls the antenna, reads data from the interface, checks the data for the image identifiers and - after the identifiers are found - records and displays the data. Taking into account an age and quality of practically available ephemeredes, the track calculation accuracy is usually not sufficient to keep a satellite witliin the antenna beam during the whole passage. Therefore the application has so-called "auto tracking" mode. In this mode, the application periodically shifts the antenna position from a calculated one in different directions by a small angle. Statistically analyzing a dependence of the input signal level on the shift direction, the application corrects the pre-calculated track. The reception can be stopped by the user's command or automatically - if no image identifiers are found in the input data during a certain time. If the signal is accidentally lost and a passage is not over, the reception can be immediately restarted. In this case the application sets the antenna to a position corresponding to the current time, opens a new file to record data, searches again for the image identifiers and so on. Actually, the only user's duty after the schedule is calculated is to observe the image quality at the PC display and stop the reception when the quality falls down at the end of a track (or restart the reception in case of an accidental loss of signal). Of course, the application can do it itself but it needs perceptibly more time (and therefore - the disk space) to make a decision. Received data are written into a file as a raster type image with an extendable header. The header contains a usual list of the image characteristics (a number of lines, number of pixels in a line, number of spectral cliannels, start time, satellite name, imaging mode, etc.). Besides, the satellite orbital elements are written in the header in a binary representation for georeference purposes (see also descriptions of ScanViewer and Catalogue Manager). Also we would like to send you more detail information about ScanViewer, Catalogue Manager applications and the information concerning the operational work with ScanER receiving station. 'ScanViewer' application (Windows 95/NT). The application is intended in the first place to look through an image, assess its quality and contents, select and save fragments for the following storage and thematically processing. The application enables to: get a detailed annotation of an image file, view any rectangular fragment of an image with an arbitrary' sample step in a gray-scale, pseudo-color or "true color" (three-channel) representation, locate an image geographically and overlay a map onto the image, correct the geographical location using unambiguously distinguishable objects in the image, save any rectangular fragment of an image to a new file of the same format (thus making all of the ScanViewer functions applicable to this file), print any image window and export it to a Windows bitmap format file, export image into Image Transformer application. A size of a loaded image fragment and number of simultaneously loaded fragments (i.e. image windows) are restricted only with the available memoiy. A geographical reference as calculated from the satellite orbital International Archives of Photogrammetry and Remote Sensing. Vol. XXXII Part 7C2, UNISPACE III, Vienna, 1999 73

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