Design, development and performance of video processor electronics for ocean imaging payload in EOS-06 satellite

Knowledge of ocean colour information is vital for locating of Potential fishing zone (PFZ). For oceanographic studies, Indian space research organization (ISRO) has launched one Ocean color monitor (OCM-3) payload onboard EOS-08 satellite. OCM-3 has 13 fine spectral bands for better delineation of ocean features with SNR requirements of ≈ 1000 (@ sea reference radiance). Video processor (VP) electronics is the critical circuit for precisely digitizing the multi-port analog signal received from the detectors while maintaining low noise. The design, development and performance of video processor electronics for OCM-3 payload is compiled in this paper. Thirteen separate electronic chains are developed catering to each spectral band. Detector video is processed with 12-bit digitization by 8-port video processor. To obtain higher SNR and lesser electrical coupling, circuit and layout are optimized. The electrical performance is showcased with an SNR of around 4000 and coupling (both intra-and inter-port) confined to less than 0.1%. The developed video processor PCB has a power dissipation of less than 1W and measures only 150 × 110 mm. Acquired onboard images illustrates SNR performance.