Definition: | The observation time in Coordinated Universal Time (UTC) | The observation time in local time relative to where the Ameriflux tower site is located | Julian day from 0 to 365 (or 366 on Leap Years) based on local timestamp | Hour of day (0 to 23) based on local timestamp | Vertical angle between a tangent normal to the site surface and the solar ray | Horizontal angle between a ray from the site to polar north and the solar ray | Unique solar position defined as the sum of the solar zenith angle and solar azimuth angle. | Top of Atmosphere Reflectances | Data quality flags for cloud and moisture imagery | Top of Atmosphere Reflectances | Data quality flags for cloud and moisture imagery | Top of Atmosphere Reflectances | Data quality flags for cloud and moisture imagery | Top of Atmosphere Reflectances | Data quality flags for cloud and moisture imagery | Top of Atmosphere Reflectances | Data quality flags for cloud and moisture imagery | Top of Atmosphere Reflectances | Data quality flags for cloud and moisture imagery | Top of Atmosphere Reflectances | Data quality flags for cloud and moisture imagery | Top of Atmosphere Reflectances | Data quality flags for cloud and moisture imagery | Top of Atmosphere Reflectances | Data quality flags for cloud and moisture imagery | Top of Atmosphere Reflectances | Data quality flags for cloud and moisture imagery | Top of Atmosphere Reflectances | Data quality flags for cloud and moisture imagery | Top of Atmosphere Reflectances | Data quality flags for cloud and moisture imagery | Top of Atmosphere Reflectances | Data quality flags for cloud and moisture imagery | Top of Atmosphere Reflectances | Data quality flags for cloud and moisture imagery | Top of Atmosphere Reflectances | Data quality flags for cloud and moisture imagery | Top of Atmosphere Reflectances | Data quality flags for cloud and moisture imagery | Ratio between outgoing radiance at one given direction and incoming radiance at another given direction (same or different from the incoming direction). | Ratio between outgoing radiance at one given direction and incoming radiance at another given direction (same or different from the incoming direction). | Ratio between outgoing radiance at one given direction and incoming radiance at another given direction (same or different from the incoming direction). | Ratio between outgoing radiance at one given direction and incoming radiance at another given direction (same or different from the incoming direction). | Ratio between outgoing radiance at one given direction and incoming radiance at another given direction (same or different from the incoming direction). | Data quality flags for bidirectional reflectance factor | Ratio between outgoing and incoming irradiance at the earth surface. | Data quality flags for land surface albedo | Binary mask indicating a medium or high probability of cloud in the pixel | Data quality flags for clear sky mask | The extinction of solar radiation due to atmospheric aerosols at a wavelength of 550 nm | Data quality flags for aerosol optical depth | Binary mask that signals the presence of certain aerosols in the pixel | Binary mask that signals the presence of certain aerosols in the pixel | Binary mask that signals the presence of certain aerosols in the pixel | Data quality flags for aerosol detection product | Instantaneous land surface skin temperature | Data quality flags for land surface temperature | Instantaneous total shortwave irradiance (flux) received at the Earth’s surface integrated over the 0.2 to 4.0 um wavelength interval | Data quality flags for downward shortwave radiation | Normalized difference between red and near-infrared reflectance–ABI Bands 2 and 3 | NDVI multiplied by near-infrared reflectance– ABI Band 3 | Approximated by multiplying DSR by 0.45 | NIRv multiplied by incoming sunlight (PAR) |
Measurement Values Domain: | Format | YYYY-MM-DD hh:mm:ss.sss | Precision | |
| Format | YYYY-MM-DD hh:mm:ss.sss | Precision | |
| Unit | day | Type | real | Min | 1 | Max | 366 |
| Unit | hour | Type | real | Min | 0 | Max | 23 |
| | | | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | Unit | Unitless factor from 0 to 1 | Type | real | Min | 0 | Max | 1 |
| | | | Unit | Dimensionless quantity | Type | real |
| | Unit | Dimensionless quantity (0 or 1) | Type | real |
| Unit | Dimensionless quantity (0 or 1) | Type | real |
| Unit | Dimensionless quantity (0 or 1) | Type | real |
| | | | Unit | wattPerMeterSquared | Type | real |
| | Unit | Unitless factor from -1 to 1 | Type | real |
| Unit | Unitless factor from -1 to 1 | Type | real |
| Unit | wattPerMeterSquared | Type | real |
| Unit | wattPerMeterSquared | Type | real |
|