Remote Sensing—Calibration and Validation
Calibration and Validation (Cal-Val) activities associated with optical remote sensing are extensive. The cal-val website of the SeaWiFS and MODIS sensors provides an excellent review of these activities. The Cal-Val activities insure that the radiometric measurements are accurate and that the derived products are validated with in situ measurements.
For example, the SeaWiFS Project Cal-Val responsibilities are listed as:
- Sensor calibration (Level-1) & response function (stray light and out-of-band) correction algorithms
- Atmospheric correction algorithms · Level-2 bio-optical, and mask & flag algorithms
- Level-3 binning algorithms
- On-line calibration, validation, & bio-optical databases (SeaBASS)
- Postlaunch sensor performance evaluation & calibration updates
- Near-real time quality control of archive products (Levels-1, -2, -3, etc.)
- Evaluation of operational and alternative algorithms (Levels-1, -2, -3)
- Verification of level-0 to level -3 code
- Development of product specifications and formats
- Definition of field and laboratory bio-optical measurement protocols
- Test and evaluation of new field and laboratory bio-optical measurement technologies.
Remote sensing data products that can be measured with WET Labs instrumentation are spectral backscattering coefficients, spectral absorption coefficients, and chlorophyll concentration.
Mail to: PO Box 518 • Ship to: 620 Applegate St. • Philomath, OR 97370 • 541-929-5650 • Fax: 541-929-5277
