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Airborne spectrometer data from patchy snow cover measured on May 2011

The dataset contains 10 meter resolution reflectance data from the terrain that is covered by patchy thin snow cover. The purpose of the airborne measurements was to investigate the effect of forest canopy and snow melting on optical remote sensing signals at the very end of melting period. The hyperspectral airborne data was acquired with an AisaDUAL imaging spectrometer on 5 May 2011 in Sodankylä and in Saariselkä, Finland. The image swath was 240 meters and flight lines were several kilometres long. The original spatial resolution of the data is 80 cm x 80 cm, but it was resampled to pixel size of 10 m. Snow depth was between 0 cm and 30 cm at the Sodankylä site and between 0 cm and 60 cm at the Saariselkä site implying that the spring melt was clearly more advanced in Sodankylä. Additionally, more snow-free pixels were found at Sodankylä than Saariselkä. During the measurements the sky was cloudless in Sodankylä (cloud cover 0/8) and cloudy (cloud cover 7/8) in Saariselkä. The data contains mosaics of the flight lines for the bands 555 nm, 645 nm, 858.5 nm and 1640 nm as well as for the Normalized Difference Snow Index (NDSI) and Normalized Difference Vegetation Index (NDVI) for both study sites.

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Additional Info

Field Value
Source http://metatieto.ymparisto.fi:8080/geoportal/catalog/search/resource/details.page?uuid={A7231C06-4DAC-4808-8B7A-5EE49FA70CFB}
Author Kirsikka Heinilä Finnish Environment Institute
Last Updated November 9, 2018, 13:35 (EET)
Created November 9, 2018, 13:35 (EET)
bbox-east-long 28.926
bbox-north-lat 67.5598
bbox-south-lat 66.6063
bbox-west-long 25.7472
doi
guid {A7231C06-4DAC-4808-8B7A-5EE49FA70CFB}
spatial {"type": "Polygon", "coordinates": [[[25.7472, 66.6063], [28.926, 66.6063], [28.926, 67.5598], [25.7472, 67.5598], [25.7472, 66.6063]]]}
spatial_harvester true
topic_category environment