Entering Anemometer Information
Anemometer Settings
- Manufacturer: Choose the sonic anemometer manufacturer and model in the menus. The gas analyzer supports the following sonic anemometer models with either digital or analog inputs:
| Anemometers for use with SmartFlux 2 | |
|---|---|
| Manufacturer | Model(s) |
| Campbell Scientific | CSAT3, CSAT3B |
| Gill Instruments | WindMaster/Pro, HS-50, HS-100, or R3-50 |
| Metek | uSonic-3 Class-A MP, uSonic-3 Cage MP |
| RM Young | 81000V, 8100RE, 8100VRE |
| Anemometers for use with LI-7550 Analog Inputs Only | ||||
|---|---|---|---|---|
| Manufacturer | Model(s) | |||
| Campbell Scientific | CSAT3 | |||
| Gill Instruments | HS-50, HS-100, R2, R3-50, R3-100, WindMaster/Pro | |||
| Metek |
uSonic-3 Class A (or USA-1 Standard) uSonic-3 Scientific (or USA-1 Fast) |
|||
| R.M. Young | 81000 | |||
- Serial Number and Software Version: These fields are important because they are used to determine some flux corrections. See the EddyPro® instruction manual or online help for more information.
- Wind data format (optional): From the three axis velocities, the wind speed is calculated, and output as either signed U, V, and W, as Polar and W, or as raw velocity values. The units of output are set during the anemometer configuration. Choose the wind data format from the menu:
-
- U, V, W (some Gill anemometers): U is the direction aligned with the north spar. V is the direction 90° counter-clockwise from the N/Reference spar. W is vertical.
- Polar, W - The wind speed in the UV plane, with direction in degrees clockwise from 0 to 359°, with respect to the Reference spar (normally aligned to North). Note: This option is not supported for Gill anemometers.
- Axis velocities - Raw velocity values for U, V, W.
- North offset (°) (mandatory): Offset, in degrees (0-359°) from which the Reference spar/axis or orientation of the anemometer varies from geographic/magnetic north.
Important: EddyPro requires the offset with respect to geographic north as two pieces of information: The offset with respect to geographic north and the magnetic declination. Currently the software does not provide an entry for magnetic declination. For the best results, enter the North Offset to magnetic North. This will create small differences in the wind direction between EddyPro and SmartFlux results (a constant offset equal to the magnetic declination), but the flux results will be the same, if all other settings are the same.
- Height (m) (mandatory): Sonic anemometer height above the ground, in meters, measured to center of the anemometer sample volume.
