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Ocean Color Experiment Ver. 2 (OCE2) ~ Concept Presentations ~

This document presents the Ocean Color Experiment Version 2 (OCE2), detailing the instrument requirements and measurement options for ocean science and atmospheric studies. Three distinct cases are outlined: Case 1 focuses on open ocean measurements at 1 km resolution, Case 2 adds additional atmospheric bands, and Case 3 includes a 250 m resolution option for coastal analysis. The summary highlights the strengths, weaknesses, and challenges of the proposed instruments, addressing technical parameters like dynamic range, signal-to-noise ratio (SNR), and calibration mechanisms.

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Ocean Color Experiment Ver. 2 (OCE2) ~ Concept Presentations ~

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  1. Ocean Color Experiment Ver. 2 (OCE2) ~ Concept Presentations ~ Radiometry Jay Smith / 550 Qian Gong / 551, Peter Hill / 551, Carl Kotecki / 553 April 27, 2011

  2. EDT Instrument Requirement Options • Case 1 • Open ocean science measurement bands at 1km 10% spatial resolution • Case 2 • Case 1 + additional atmosphere science bands (3-4) at 1km 10% spatial resolution • Case 3 • Case 2 + 250m (10% - ?) spatial resolution option to address atmosphere and coastal oceans science

  3. Analysis Constants and Definitions

  4. Instrument Parameters

  5. Channel Specific Parameters

  6. Channel Specific Parameters – cont’d

  7. Ltyp => Lmax Dynamic Range - f(λμm)

  8. Instrument timing parameters

  9. A*Ω throughput product (1km and 250m)

  10. Photons => Photo-current

  11. Ltyp & Lmax Photo-Current (1km)

  12. Ltyp & Lmax Photo-Current (250m)

  13. SNR Input Parameters

  14. SNR’s - Aggregated and 5nm bands (1km)

  15. SNR’s - Aggregated and 5nm bands (250m)

  16. Aggregated SNR Predicts (1km)

  17. Summary • The GOOD: • Little, if any, • spatial crosstalk • spectral crosstalk • spectral ‘drift’ • striping • Serves atmosphere and oceans applications • Do not need spectral diffuser plate (internal target) • Calibration target door incorporated • Simple and high TRL components with production assembly advantages • Graceful failure degradation • Dynamic pre-amp integration control (available) to accommodate Lmax’s (saturation). • The BAD • Individual channel accessibility during I&T • Unknown fiber coating - selectivity and application • SNR performance at 5nm resolution is not as ‘plentiful’ as requested The UGLY • (144 + 32) channels seems a bit ‘excessive’

  18. Backup Material

  19. Geometry model for look-ahead angle

  20. iFOV corrections due to 20 look-ahead tilt angle, orbit alt. and curved Earth

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