Configuring a Custom Program for EddyPro

Data recorded in custom programs can be processed in EddyPro 4 and above if the datalogger is configured properly. The following sections provide information about configuring the datalogger.

ComsTag Unit ID

As described in Custom Configurations (Custom Configurations), if you want to log data to an LI-7550 in compressed .ghg files, for subsequent processing in EddyPro, the ComsTag block for each variable must be named according to the convention described here.

Table 4‑1. Unit identifiers for ComsTag properties.
Unit Identifier Units
1 K
2 C
3 F
4 kPa
5 Pa
6 W/m^2
7 umol/m^2/s
8 mm
9 cm
10 m
11 %Vol
12 m^3/m^3
13 mmH2O/m^2/s
14 ml/h
15 cm/s
16 m/s
17 mm/h
18 V
19 %
20 deg
99 Other

ComsTag DataID

As described in Custom Configurations (see Custom Configurations), if you want to log data to an LI-7550 in compressed .ghg files, for subsequent processing in EddyPro, the ComsTag block for each variable must include the data identifier from this list.

Table 4‑2. Data identifiers for ComsTag properties.
Data Identifier EddyPro Label Sensor
1 TA Air Temperature
2 PA Air Pressure
3 RH Relative Humidity
4 RG Global Radiation
5 RN Net Radiation
6 RD Diffuse Radiation
7 RR Reflected Radiation
8 R_uva UVA Radiation
9 R_uvb UVB Radiation
10 SWIN Shortwave Incoming Radiation
11 SWOUT Shortwave Outgoing Radiation
12 SWBC Shortwave Below Canopy Radiation
13 SWDIF Shortwave Diffuse Radiation
14 LWIN Longwave Incoming Radiation
15 LWOUT Longwave Outgoing Radiation
16 TC Canopy Temperature
17 TBOLE Bole Temperature
18 P Precipitation
19 P_RAIN Rain Precipitation
20 P_SNOW Snow Precipitation
21 PPFD Photosynthetic Photon Flux Density (PAR)
22 PPFDD Diffuse PPFD
23 PPFDR Reflected PPFD
24 PPFDBC Below Canopy PPFD
25 APAR Absorbed Photosynthetically Active Radiation (PAR)
26 ALB Albedo
27 PRI Photochemical Reflectance Index
28 LAI Leaf Area Index
29 SAPFLOW Sap Flow
30 STEMFLOW Stem Flow
31 TBC Air Temperature Below Canopy
32 TR Tree Transpiration
33 WS Wind Speed
34 MWS Max Wind Speed
35 WD Wind Direction
36 SWC Soil Water Content
37 SHF Soil Heat Flux
38 TS Soil Temperature
39 VIN Input Voltage
99   Other

VariableID

Although EddyPro can "blindly" summarize any variable, including variables that are not listed in the previous sections, it is unable to use the variable in flux computations (e.g., air temperature) unless the variable is identified properly in the header. The convention described below will ensure that EddyPro can interpret the variable.