Software tools
DIMITRI has a user-friendly interface for reading the database and making intercomparisons over these sites based on user-selection of a reference sensor, against which other sensors are compared. The software package contains a suite of IDL routines (it can be run with a free IDL run time license). DIMITRI can be used for the intercomparison of TOA radiance and reflectance values within the 400nm – 4μm wavelength range; this is generally known as Level 1b Earth Observation (EO) satellite data. DIMITRI offers the following capabilities and functionalities:
- Product reader and data extraction routines
- Comparison of satellite data based on user defined cloud screening parameters as well as temporal, spatial and geometric matching
- Extracted Top of Atmosphere (TOA) reflectance time series and variability
- Updated radiometric recalibration & bidirectional reflectance distribution function (BRDF) modelling
- Rayleigh and Sun glint TOA intercomparison with modelled data
- L1b auxiliary data extraction (e.g. ozone, water vapour)
- Quicklook generation with Region of Interest (ROI) overlays
- Automated & manual cloud screening of new products
- CSV outputs and improved JPGs
- Interactive Human-Machine Interface (HMI) and Data visualisation tool
- Absolute angular matching criteria
- Instrument spectral response comparison tool
More information can be found in the Software User Manual
Algorithm Theoretical Baseline Documents
Automated Cloud Screening in DIMITRI 3.0aAutomated Cloud Screening in DIMITRI 3.0bRayleigh Scattering Methodology for Vicarious CalibrationRadiometric monitoring using oceanic sitesInterband Vicarious Calibration over Sun glintBand-to-band intercalibration using the sun glint over oceanSensor to simulation intercomparison over PICSRadiometry monitoring using Desert sites