NOAA VIIRS Level 3 Global Inherent Optical Properties (IOP) Near Real-time Data 2024

This dataset provides near real-time (NRT) global inherent optical properties (IOP) products derived from VIIRS satellite data for 2024. It includes per-pixel absorption and backscattering coefficients for seawater constituents like phytoplankton and detritus, supporting water-type classification, clarity assessment, and biogeochemical studies. The data is produced by NASA's Ocean Biology DAAC and combines ancillary meteorological and ozone data for calibration.

Use Cases

• Analyze phytoplankton dynamics in coastal regions using aph_445 absorption coefficient
• Assess water clarity for recreational safety using bbp_445 particulate backscattering
• Model radiative transfer in ocean optics using total absorption and backscattering coefficients
• Compare cross-sensor IOP retrievals using rrsdiff fractional difference metric

Strengths

• Derived using the Generalized Inherent Optical Properties (GIOP) model framework enabling robust cross-sensor comparisons
• Provides per-pixel uncertainties for key variables (e.g., aph_unc_445, adg_unc_445, bbp_unc_445) supporting error propagation
• Combines ancillary meteorological and ozone data for improved calibration
• Near real-time (NRT) availability offers snapshot capability within a single orbit

Limitations

• Near real-time products may have lower calibration optimality compared to science-quality products
• Row count and file formats are unspecified in the input metadata
• Freshness is unknown as last update date is not provided
• May reflect geographic/temporal biases inherent to the NASA Ocean Biology DAAC processing system

Provenance

Source

NASA Ocean Biology DAAC (OB.DAAC)

Collection Method

Satellite remote sensing retrieval using VIIRS sensor data processed through the Generalized Inherent Optical Properties (GIOP) model framework.

Time Range

2024

Freshness

Near real-time (NRT) with updates likely daily but exact frequency unspecified.

Geography

Global ocean coverage