Laboratory and Field Spectroscopy

Radiometric ground-level analysis is an important first stage for testing empirical relationships under controlled conditions, and should be carried out before analyzing remote sensing data provided by satellite images. In addition, it provides essential information for RTM calibration and validation.

The core instrument behind the laboratory and field spectroscopy tasks in Biospec is an ASD Fieldspec FR 3 (www.asdi.com) spectroradiometer which measures radiance and reflectance from 350nm-2500nm. Measurements are being carried out in the laboratory and in the field.

 

   
 

Additionally, for continuous spectroscopic sampling a Unispec (Unispec DC, PP Systems, Haverhill, MA, USA) spectro-radiometer with dual detector arrays (simultaneous measurements of incoming solar irradiance and reflected radiance) will be mounted on a boom attached to the flux tower in the Biospec main study site (Majadas), measuring from a nadir sampling view.

Chlorophyll and Nitrogen laboratory analysis

At the INIA, Chlorophyll and Nitrogen is obtained from holm oak trees leaves. LECO model CN 2000 is used for Nitrogen and DMSO method is used for Chlorophyll.