AIRBORNE SPECTROMETER MEASUREMENTS FROM BOREAL AND TUNDRA SITE DURING SPRING SNOW MELT
The dataset contains 10 meter resolution reflectance data from boreal and tundra sites during spring snow melt. 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 hyperspect...
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ftzenodo:oai:zenodo.org:3048902 2024-09-09T20:08:12+00:00 AIRBORNE SPECTROMETER MEASUREMENTS FROM BOREAL AND TUNDRA SITE DURING SPRING SNOW MELT Heinilä Kirsikka 2019-05-28 https://doi.org/10.5281/zenodo.3048902 unknown Zenodo https://zenodo.org/communities/boreal_reflectances https://doi.org/10.5281/zenodo.3048901 https://doi.org/10.5281/zenodo.3048902 oai:zenodo.org:3048902 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode reflectance AISA airborne spectrometer snow melt boreal forest tundra info:eu-repo/semantics/other 2019 ftzenodo https://doi.org/10.5281/zenodo.304890210.5281/zenodo.3048901 2024-07-26T16:02:26Z The dataset contains 10 meter resolution reflectance data from boreal and tundra sites during spring snow melt. 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. Saariselkä is a fell region and partly represents open tundra. The image swath was 240 meters and flight lines were several kilometers long. The original spatial resolution of the data is 80 cm x 80 cm, but it was resampled to pixel size of 10 m x 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 for both study sites. Sampling: The airborne hyperspectral data were acquired with an AisaDUAL imaging spectrometer manufactured by Spectral Imaging Ltd (SPECIM). The airborne spectral measurements were made from airplane at an altitude of 800 m offering a spatial resolution of 0.8 m and a swath of 240 m. Flight lines were several kilometers long. The instrument foreoptic unit was set to look at nadir (0 degrees) and the field of view (FOV) was 17 degrees. The Oxford Technical Solutions RT4000 GPS/INS was utilized to provide high accuracy position measurements with low drift rates. The reflectance level was obtained by applying a real-time fibre optic downwelling irradiance sensor (FODIS). The measurements from Sodankylä were carried out in direct illumination (i.e. clear sky: 0/8) and the measurements from Saariselkä were carried out in diffuse illumination (i.e. cloudy sky: ... Other/Unknown Material Sodankylä Tundra Zenodo Sodankylä ENVELOPE(26.600,26.600,67.417,67.417) |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
reflectance AISA airborne spectrometer snow melt boreal forest tundra |
spellingShingle |
reflectance AISA airborne spectrometer snow melt boreal forest tundra Heinilä Kirsikka AIRBORNE SPECTROMETER MEASUREMENTS FROM BOREAL AND TUNDRA SITE DURING SPRING SNOW MELT |
topic_facet |
reflectance AISA airborne spectrometer snow melt boreal forest tundra |
description |
The dataset contains 10 meter resolution reflectance data from boreal and tundra sites during spring snow melt. 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. Saariselkä is a fell region and partly represents open tundra. The image swath was 240 meters and flight lines were several kilometers long. The original spatial resolution of the data is 80 cm x 80 cm, but it was resampled to pixel size of 10 m x 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 for both study sites. Sampling: The airborne hyperspectral data were acquired with an AisaDUAL imaging spectrometer manufactured by Spectral Imaging Ltd (SPECIM). The airborne spectral measurements were made from airplane at an altitude of 800 m offering a spatial resolution of 0.8 m and a swath of 240 m. Flight lines were several kilometers long. The instrument foreoptic unit was set to look at nadir (0 degrees) and the field of view (FOV) was 17 degrees. The Oxford Technical Solutions RT4000 GPS/INS was utilized to provide high accuracy position measurements with low drift rates. The reflectance level was obtained by applying a real-time fibre optic downwelling irradiance sensor (FODIS). The measurements from Sodankylä were carried out in direct illumination (i.e. clear sky: 0/8) and the measurements from Saariselkä were carried out in diffuse illumination (i.e. cloudy sky: ... |
format |
Other/Unknown Material |
author |
Heinilä Kirsikka |
author_facet |
Heinilä Kirsikka |
author_sort |
Heinilä Kirsikka |
title |
AIRBORNE SPECTROMETER MEASUREMENTS FROM BOREAL AND TUNDRA SITE DURING SPRING SNOW MELT |
title_short |
AIRBORNE SPECTROMETER MEASUREMENTS FROM BOREAL AND TUNDRA SITE DURING SPRING SNOW MELT |
title_full |
AIRBORNE SPECTROMETER MEASUREMENTS FROM BOREAL AND TUNDRA SITE DURING SPRING SNOW MELT |
title_fullStr |
AIRBORNE SPECTROMETER MEASUREMENTS FROM BOREAL AND TUNDRA SITE DURING SPRING SNOW MELT |
title_full_unstemmed |
AIRBORNE SPECTROMETER MEASUREMENTS FROM BOREAL AND TUNDRA SITE DURING SPRING SNOW MELT |
title_sort |
airborne spectrometer measurements from boreal and tundra site during spring snow melt |
publisher |
Zenodo |
publishDate |
2019 |
url |
https://doi.org/10.5281/zenodo.3048902 |
long_lat |
ENVELOPE(26.600,26.600,67.417,67.417) |
geographic |
Sodankylä |
geographic_facet |
Sodankylä |
genre |
Sodankylä Tundra |
genre_facet |
Sodankylä Tundra |
op_relation |
https://zenodo.org/communities/boreal_reflectances https://doi.org/10.5281/zenodo.3048901 https://doi.org/10.5281/zenodo.3048902 oai:zenodo.org:3048902 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.304890210.5281/zenodo.3048901 |
_version_ |
1809941871612395520 |