FREddyPro (version 1.0)

calculateFootprint: Minimum argument footprint calculation

Description

A wrapper function for quick calculation of the average footprint for a specific period of time with minimum required arguments

Usage

calculateFootprint(df, displacement, stability = NULL, fetch = 500,
grid = 200, height, lowerDay = NULL, upperDay = NULL)

Arguments

df

The data frame to use

displacement

Displacement height in meters.

stability

Integer used to mask the data for stability. 1=Unstable, 2=neutral, 3=stable conditions.

fetch

The upwind distance over which you want the calculation domain to extend. Note that the footprint will be normalized to that domain so footprints that extend well beyond the domain will be overrepresented in

grid

The total calculation grid size. The default is 200 which would mean the footprint would be represented in a 200x200 array corresponding to dimensions of two times the fetch on each side of the grid.

height

The z-d height of the flux system

lowerDay

The lower limit of the period to calculate the footprint

upperDay

The upper limit of the period to calculate the footprint

Value

Returns a list object of a footprint similar to that of the function Average

Examples

## Load the data
data(fluxes)

## Clean fluxes
fluxes=cleanFluxes(fluxes,sdCor=TRUE,sdTimes=3,timesList=3,distCor=TRUE,
                   thresholdList=list(H=c(-100,1000),LE=c(-100,1000)))	

## Quick calculation of footprint
ftp=calculateFootprint(fluxes,17.42,stability=1,fetch=500,grid=200,height=33,
lowerDay=150,upperDay=151)

## You can also use the plot.footprint function of FREddyPro to plot the result
plotFootprint(ftp)