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Havsis- och snöinformation ur datorbearbetade satellitdata – en modellstudie
SMHI, Core Services.
SMHI.
1979 (Swedish)Report (Other academic)
Abstract [sv]

Programvara har utvecklats för en datoriserad bearbetning av NOAA VHRR data. Den omfattar geometriska korrektioner, presentation av kalibreringsdata, derivering av data, gråtonsförskjutning, olika presentationssätt etc. En SAAB D23 har använts för beräkningarna. Radskrivare har för det mesta använts för presentation av data, men också elektrostatisk rasterplotter och bläckstråleskrivare har nyttjats. De analoga VHRR data har digitaliserats vid FOA (Försvarets Forskningsanstalt).

Programvaran har huvudsakligen applicerats på havsis- och snöstudier. Men ytvattentemperaturer och en förmodad oljefläck vid Bravoplattformen i Ekofiskområdet har också studerats.

Digitalt bearbetade satellitdata är mer användbara än fotografiska bilder vid snö- och iskartläggning. En kvantifiering av snötäckningsgrad och vissa isparametrar är möjlig, men för många ändamål är en multispektral bearbetning nödvändig för att undvika falsk information.

En kort isstudie med datorbearbetade LANDSAT-data har också utförts. Programvaran har utvecklats vid FOA.

Abstract [en]

Computer programs have been developed for handling of NOAA VHRR digital data. The programs include geometric corrections, presentation of calibration data, derivation of data, variation of grey scales, different presentation forms etc. A SAAB D23 computer has been used for the computations. Line printer has mostly been used for presentation of data, but also electrostatic plotter and ink jet plotter have been used. The analogue VHRR data was digitized at the Swedish Defense Rese·arch Board. The soft ware has mainly been applied to sea ice and snow studies but also in a less degree to studies of sea surface temperature and examination of data, which was supposed to be the oil spill at platform Bravo ·in the Ekofisk area. Digital processed satellite data are more useful than photographic pictures both for sea ice and snow mapping. Quantification of snow cover and sorne ice parameters is possible, but for many purposes a multispectral data analysis is necessary in order to avoid false information. A short sea ice study with computer processed LANDSAT data has also been carried out. The soft ware used was developed at the Swedish Defense Research Board.

Place, publisher, year, edition, pages
SMHI , 1979. , p. 35
Series
RMK: Report Meteorology and Climatology, ISSN 0347-2116 ; 15
Keywords [sv]
snökartering, havsiskartering
National Category
Meteorology and Atmospheric Sciences Climate Research
Research subject
Meteorology; Climate
Identifiers
URN: urn:nbn:se:smhi:diva-2736Local ID: Meteorologi, Rapporter, Serie RMKOAI: oai:DiVA.org:smhi-2736DiVA, id: diva2:948032
Available from: 1979-09-18 Created: 2016-07-08 Last updated: 2019-08-06Bibliographically approved

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CiteExportLink to record
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Citation style
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