REFIR-BB

REFIR/BB is a Fourier Transform Spectrometer operating in spectral range 100-1000 cm-1, with a sampling resolution of about 0.5 cm-1; at the moment it is hosted in a mobile laboratory.

It makes use of four amplitude beam splitters and two pyroelectric detectors operating at room temperature. REFIR/BB provides broad spectral coverage, two separated input ports and two output ports, optical compensation for tilt errors in the moving mirror unit.

The calibration system is composed of three Black Body (BB) sources, a reference BB in front of the first input port and two BBs (hot and cold) in front of the measurement channel. The electronical interfaces provides the acquisition of signals and the control of the moving mirro support. All the operations are controlled by PC-based electronics with LabView software. Acquisition cards are one ICS-610-4 24-bit resolution for the main signals and one NI-PCI-6033-E 16-bit resolutions for the housekeepings (mirrors and beam-splitters temperature).

REFIR/BB was tested for the first time in the field to check its reliability and radiometric performance during a field campaign held at Toppo di Castelgrande (40º 49' N, 15º 27' E, 1258 m a. s. l.), a mountain site in South Italy, and was used during EAQUATE measurements campaign, held at CNR-IMAA, Tito Scalo (PZ) (Esposito et al 2007a).

More details can be found in the technical documentations.