N: 90 S: -90 E: 180 W: -180
Description
The Remote Sensing Reflectance (RRS) suite provides the remote sensing reflectance at wavelength λ (nm)—the ratio of water-leaving radiance to downwelling irradiance just above the surface (units sr⁻¹). Variables are named by their band center (e.g., Rrs_412, Rrs_443). Rrs_λ is the foundational observable used to retrieve products such as chlor_a, Kd_490, IOPs, and to support algorithm development, validation, water-quality, and ecosystem applications. Users should review per-file quality flags (e.g., land, cloud, sun glint, high aerosol) and mission documentation—especially in optically complex coastal/inland waters.
Geophysical variables in this suite include:
• Rrs — Remote sensing reflectance (sr⁻¹)
This activity was informed by the Satellite Needs Working Group (SNWG), an interagency effort of the U.S. Government dedicated to identifying and addressing Earth observation needs across U.S. civilian federal agencies.
Product Summary
Documents
ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)
Variables
The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.
For questions on a specific variable, please use the Earthdata Forum.
| Name Sort descending | Description | Units | Data Type | Fill Value | Valid Range | Scale Factor | Offset |
|---|---|---|---|---|---|---|---|
| angstrom | Aerosol Angstrom exponent, 443 to 865 nm | N/A | int16 | -32767 | -30000 to 5000 | 9.9999997473788E-5 | 2.5 |
| aot_865 | Aerosol optical thickness at 865 nm | N/A | int16 | -32767 | 0 to 30000 | 9.9999997473788E-5 | 0 |
| lat | Latitude | degrees_north | float32 | -999 | -90 to 90 | N/A | N/A |
| lon | Longitude | degrees_east | float32 | -999 | -180 to 180 | N/A | N/A |
| palette | palette | N/A | uint8 | N/A | N/A | N/A | N/A |
| Rrs_400 | Remote sensing reflectance at 400 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 | 0.050000000745058 |
| Rrs_412 | Remote sensing reflectance at 412 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 | 0.050000000745058 |
| Rrs_443 | Remote sensing reflectance at 443 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 | 0.050000000745058 |
| Rrs_490 | Remote sensing reflectance at 490 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 | 0.050000000745058 |
| Rrs_510 | Remote sensing reflectance at 510 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 | 0.050000000745058 |
| Rrs_560 | Remote sensing reflectance at 560 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 | 0.050000000745058 |
| Rrs_620 | Remote sensing reflectance at 620 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 | 0.050000000745058 |
| Rrs_665 | Remote sensing reflectance at 665 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 | 0.050000000745058 |
| Rrs_674 | Remote sensing reflectance at 674 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 | 0.050000000745058 |
| Rrs_681 | Remote sensing reflectance at 681 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 | 0.050000000745058 |
| Rrs_709 | Remote sensing reflectance at 709 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 | 0.050000000745058 |