Community Research and Development Information Service - CORDIS


Coastal zone colour scanner (CZCS) data processing for obtaining synoptic maps of chlorophyll-like pigment concentration and other derived products has still not become a commonly practised approach although the usefulness of these data for many applications is widely accepted. The main reason for this is the rather heavy "number-crunching" required in CZCS data processing because of the atmospheric correction. As a first step, software has been developed for CZCS data processing on a normal PC-AT with numerical co-processor and EGA colour display. It is written in Turbo Pascal Vs. 4.0 and uses the approach to atmospheric correction that has recently been recommended by Bricaud and Morel (1987). Typical processing time is of the order of 20 to 40 hours for a 400 x 400 pixel scene. A transputer board with 8 T800 processor chips each with 1 Mbyte DRAM has been installed into the PC and the processing software translated into Parallel-C using the "farming" technique : the processing time decreases to some minutes. The atmospheric correction algorithm, the correction for multiple scattering, the estimate of aerosol optical thickness and algorithms for derived products are described in detail.

Additional information

Authors: STURM B, JRC Ispra (IT);METZDORF H, JRC Ispra (IT)
Bibliographic Reference: EUR 12478 EN (1990) 16 pp., MF, ECU 4, blow-up copy ECU 5
Availability: (2)
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