title: The hyperspectral irradiometer, a new instrument for long-term and unattended field spectroscopy measurements.
abstract: Reliable time series of vegetation optical properties are needed to improve the modeling of the terrestrial carbon budget with remote sensing data. This paper describes the development of an automatic spectral system able to collect continuous long-term in-field spectral measurements of spectral down-welling and surface reflected irradiance. The paper addresses the development of the system, named hyperspectral irradiometer (HSI), describes its optical design, the acquisition, and processing operations. Measurements gathered on a vegetated surface by the HSI are shown, discussed and compared with experimental outcomes with independent instruments.
authors.affiliation: European Commission, DG-JRC, Institute for Environment and Sustainability, Monitoring Agricultural Resources Unit, Via Fermi 2749, 21027, Ispra, VA, Italy. michele.meroni@jrc.ec.europa.eu
authors.forename: M
authors.initials: M
authors.lastname: Meroni
authors.forename: A
authors.initials: A
authors.lastname: Barducci
authors.forename: S
authors.initials: S
authors.lastname: Cogliati
authors.forename: F
authors.initials: F
authors.lastname: Castagnoli
authors.forename: M
authors.initials: M
authors.lastname: Rossini
authors.forename: L
authors.initials: L
authors.lastname: Busetto
authors.forename: M
authors.initials: M
authors.lastname: Migliavacca
authors.forename: E
authors.initials: E
authors.lastname: Cremonese
authors.forename: M
authors.initials: M
authors.lastname: Galvagno
authors.forename: R
authors.initials: R
authors.lastname: Colombo
authors.forename: U Morra
authors.initials: UM
authors.lastname: di Cella