N: 90 S: -90 E: 180 W: -180
Description
MODIS (or Moderate-Resolution Imaging Spectroradiometer) is a key instrument aboard the Terra (EOS AM) and Aqua (EOS PM) satellites. Terra's orbit around the Earth is timed so that it passes from north to south across the equator in the morning, while Aqua passes south to north over the equator in the afternoon. Terra MODIS and Aqua MODIS are viewing the entire Earth's surface every 1 to 2 days, acquiring data in 36 spectral bands, or groups of wavelengths (see MODIS Technical Specifications). These data will improve our understanding of global dynamics and processes occurring on the land, in the oceans, and in the lower atmosphere. MODIS is playing a vital role in the development of validated, global, interactive Earth system models able to predict global change accurately enough to assist policy makers in making sound decisions concerning the protection of our environment.
Product Summary
Citation
Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.
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ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)
PROCESSING HISTORY
DATA CITATION GUIDELINES
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 |
|---|---|---|---|---|---|---|
| geophysical_data/angstrom | Aerosol Angstrom exponent, 443 to 865 nm | N/A | int16 | -32767 | -30000 to 5000 | 9.9999997473788E-5 |
| geophysical_data/aot_869 | Aerosol optical thickness at 869 nm | N/A | int16 | -32767 | 0 to 30000 | 9.9999997473788E-5 |
| geophysical_data/chlor_a | Chlorophyll Concentration, OCI Algorithm | mg m^-3 | float32 | -32767 | 0.0010000000474975 to 100 | N/A |
| geophysical_data/ipar | Instantaneous Photosynthetically Available Radiation | micromol m^-2 s^-1 | int16 | -32767 | N/A | 0.10000000149012 |
| geophysical_data/Kd_490 | Diffuse attenuation coefficient at 490 nm, KD2 algorithm | m^-1 | int16 | -32767 | 50 to 30000 | 0.00019999999494758 |
| geophysical_data/l2_flags | Level-2 Processing Flags | N/A | int32 | N/A | -2147483648 to 2147483647 | N/A |
| geophysical_data/nflh | Normalized Fluorescence Line Height | W m^-2 um^-1 sr^-1 | int16 | -32767 | -26471 to 32353 | 8.4999999671709E-5 |
| geophysical_data/par | Photosynthetically Available Radiation, R. Frouin | mol m^-2 day^-1 | int16 | -32767 | -32750 to 32250 | 0.0020000000949949 |
| geophysical_data/pic | Calcite Concentration, Balch and Gordon | mol m^-3 | int16 | -32767 | -32500 to 30000 | 1.9999999949505E-6 |
| geophysical_data/poc | Particulate Organic Carbon, D. Stramski, 2007 (443/555 version) | mg m^-3 | int16 | -32767 | -32000 to -27000 | 0.20000000298023 |
| geophysical_data/Rrs_412 | Remote sensing reflectance at 412 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 |
| geophysical_data/Rrs_443 | Remote sensing reflectance at 443 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 |
| geophysical_data/Rrs_469 | Remote sensing reflectance at 469 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 |
| geophysical_data/Rrs_488 | Remote sensing reflectance at 488 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 |
| geophysical_data/Rrs_531 | Remote sensing reflectance at 531 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 |
| geophysical_data/Rrs_547 | Remote sensing reflectance at 547 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 |
| geophysical_data/Rrs_555 | Remote sensing reflectance at 555 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 |
| geophysical_data/Rrs_645 | Remote sensing reflectance at 645 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 |
| geophysical_data/Rrs_667 | Remote sensing reflectance at 667 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 |
| geophysical_data/Rrs_678 | Remote sensing reflectance at 678 nm | sr^-1 | int16 | -32767 | -30000 to 25000 | 1.9999999949505E-6 |
| navigation_data/latitude | Latitude | degrees_north | float32 | -999 | -90 to 90 | N/A |
| navigation_data/longitude | Longitude | degrees_east | float32 | -999 | -180 to 180 | N/A |
| navigation_data/tilt | Sensor tilt angle | degree | float32 | -32767 | -25 to 25 | N/A |
| scan_line_attributes/clat | Center Latitude | degrees_north | float32 | -999 | -90 to 90 | N/A |
| scan_line_attributes/clon | Center Longitude | degrees_east | float32 | -999 | -180 to 180 | N/A |
| scan_line_attributes/csol_z | Center Solar Zenith Angle | degree | float32 | -999 | -90 to 90 | N/A |
| scan_line_attributes/day | Scan day of year | days | int32 | -32767 | 0 to 366 | N/A |
| scan_line_attributes/detnum | Detector Number (zero-based) | N/A | int8 | -1 | 0 to 25 | N/A |
| scan_line_attributes/elat | Ending Latitude | degrees_north | float32 | -999 | -90 to 90 | N/A |
| scan_line_attributes/elon | Ending Longitude | degrees_east | float32 | -999 | -180 to 180 | N/A |
| scan_line_attributes/msec | Scan time, milliseconds of day | milliseconds | int32 | -32767 | 0 to 86400000 | N/A |
| scan_line_attributes/mside | Mirror Side (zero-based) | N/A | int8 | -1 | 0 to 1 | N/A |
| scan_line_attributes/slat | Starting Latitude | degrees_north | float32 | -999 | -90 to 90 | N/A |
| scan_line_attributes/slon | Starting Longitude | degrees_east | float32 | -999 | -180 to 180 | N/A |
| scan_line_attributes/time | scan line time in seconds since 1970-1-1 | seconds since 1970-1-1 | float64 | -32767 | N/A | N/A |
| scan_line_attributes/year | Scan year | years | int32 | -32767 | 1900 to 2100 | N/A |
| sensor_band_parameters/aw | Band-pass averaged absorption coefficient for seawater | m^-1 | float32 | -32767 | 9.9999997473788E-5 to 5 | N/A |
| sensor_band_parameters/bbw | Band-pass averaged backscattering coefficient for seawater | m^-1 | float32 | -32767 | 4.9999998736894E-6 to 1 | N/A |
| sensor_band_parameters/F0 | Mean Solar Flux | W m^-2 um^-1 | float32 | -32767 | 0 to 250 | N/A |
| sensor_band_parameters/k_no2 | NO2 Absorption cross-sections | cm^2 molecule^-1 | float32 | -32767 | 0 to 0.10000000149012 | N/A |
| sensor_band_parameters/k_oz | Ozone Absorption cross-sections | cm^-1 | float32 | -32767 | 0 to 0.10000000149012 | N/A |
| sensor_band_parameters/Tau_r | Rayleigh Optical Thickness | N/A | float32 | -32767 | 0 to 0.5 | N/A |
| sensor_band_parameters/vcal_gain | Vicarious Calibration Gain | N/A | float32 | -32767 | 0 to 2 | N/A |
| sensor_band_parameters/vcal_offset | Vicarious Calibration Offset | mW cm^-2 um^-1 sr^-1 | float32 | -32767 | 0 to 10 | N/A |
| sensor_band_parameters/wavelength | wavelengths | nm | int32 | -32767 | 0 to 20000 | N/A |