Initial Sample of HYPERNETS Hyperspectral Water Reflectance Measurements for Satellite Validation from the LPAR site (Argentina)

Name: Initial Sample of HYPERNETS Hyperspectral Water Reflectance Measurements for Satellite Validation from the LPAR site (Argentina)
License: https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Keywords: Hyperspectral

Datos de investigación

Initial Sample of HYPERNETS Hyperspectral Water Reflectance Measurements for Satellite Validation from the LPAR site (Argentina)

Autores: Dogliotti, Ana Inés Icon

; Piegari, Estefanía Icon

; Rubinstein, Lucas Tomas Icon

; Perna, Pablo Alejandro Icon

Colaboradores: Idoeta, Fabricio Miguel Icon

Publicador: Consejo Nacional de Investigaciones Científicas y Técnicas

Fecha de depósito: 06/06/2024

Fecha de creación: 06-2023

Clasificación temática:

Otras Ciencias de la Tierra y relacionadas con el Medio Ambiente

Resumen

The HYPERNETS project (www.hypernets.eu) has the overall aim to ensure that high quality in situ measurements are available to support the (VNIR/SWIR) optical Copernicus products. Therefore, it established a new autonomous hyperspectral spectroradiometer (HYPSTAR® - www.hypstar.eu) dedicated to land and water surface reflectance validation with instrument pointing capabilities. In the prototype phase, the instrument is being deployed at 24 sites covering a range of water and land types and a range of climatic and logistic conditions. This dataset provides the first published data for the HYPERNETS site in Rio de La Plata, LPAR, in Argentina. It is a subset of the complete data record which consists of the best quality LPAR measurements which could be used for satellite validation.

Métodos

The provided NetCDF files are the L2A hypernets products with water leaving radiance and reflectances (without NIR Similarity Correction, see Ruddick et al., 2006, DOI:10.2307/3841124). The reflectance in the L2A products is the Water Reflectance (referred to as reflectance_nosc in the file) defined as: ρwnosc=π(Lu−ρFLd)/Ed where Lu is the upwelling radiance (at 40° zenith angle, and, 90° or 135° azimuth angle relative to the sun), Ld is the downwelling radiance (at 140° zenith angle, and, 90° or 135° azimuth angle relative to the sun). Ed is the (hemispherical) downwelling irradiance (i.e. including both direct solar and diffuse sky irradiance). To obtain this dataset, we start from the full LPAR data record and omit all the data that do not pass all of the quality checks performed as part of the hypernets_processor. In addition, an additional screening procedure was developed to supply the best quality data suitable for satellite validation: 1. The coefficient of variation in water reflectance is below 10% in the 400-900 nm range 2. The water reflectance at 500 nm is below 0.1

Palabras clave: Hyperspectral, Reflectance, Rio de la Plata, Satellite validation

Alcance geográfico

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Identificador del recurso

URI: http://hdl.handle.net/11336/237374

Colecciones

Datos de Investigación (IIIA)
Datos de Investigación de INSTITUTO DE INVESTIGACION E INGENIERIA AMBIENTAL

Datos de Investigación(IAFE)
Datos de Investigación de INST.DE ASTRONOMIA Y FISICA DEL ESPACIO(I)

Citación

Dogliotti, Ana Inés; Piegari, Estefanía; Rubinstein, Lucas Tomas; Perna, Pablo Alejandro; (2024): Initial Sample of HYPERNETS Hyperspectral Water Reflectance Measurements for Satellite Validation from the LPAR site (Argentina). Consejo Nacional de Investigaciones Científicas y Técnicas. (dataset). http://hdl.handle.net/11336/237374

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Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)