Developments in sensor design have improved the data quality of images in the shortwave infrared region. Parallel to this has been the improvement in the performance of radiance spheres in the SWIR region by replacing the traditional barium sulphate coating with a thick PTFE (Spectralon) inner lining.
Through the development of the GHOST (Greenhouse Observations of the Stratosphere and Troposphere) project the National Centre for Earth Observation together with the Field Spectroscopy Facility have purchased and calibrated the new Helios radiance sphere system from LabSphere.
Available to loan for system calibration or cross calibration NERC science projects at FSF or user's laboratory.
High reflectance Spectralon (PTFE) inner liner for improved shortwave infrared spectral output in comparison to barium sulphate coating.
Highly uniform output when viewing rear hemisphere (back wall) or across output port.
Three tungsten halogen light sources for fixed or variable output from 0 to > 45,000 cd/m2 ( > 1.5 mW/m2/sr/nm @ 900nm)
NPL (National Physical Laboratory) spectral radiance calibration (350 - 2500 nm).
Robust cage design for greater portability.
Automated logging of all sphere parameters.