MetFns (version 2.2.0)

filter.F: Selection of visual meteor data by correction factor for field-of-view obstruction

Description

Selects data for a given visual meteor rate dataset and specified correction factor or interval of correction factors for field-of-view obstruction.

Usage

filter.F(data,F.low = 1,F.up = 3)

Arguments

data

data frame consisting of visual meteor rate data.

F.low

numeric vector with value between 1 (default) and 3, specifying lower boundary of correction factor for field-of-view obstruction.

F.up

numeric vector with value between 1 and 3 (default), specifying upper boundary of correction factor for field-of-view obstruction.

Value

filter.F returns data frame with the same number of columns as the argument data, containing observations with the correction factors for field-of-view obstruction between F.low and F.up.

Details

Correction factor F is calculated by the formula F=1/(1-p), where p is a fraction (0<p<1) of field-of-view obstruction.

References

Rendtel J. and Arlt R., editors (2008). IMO Handbook For Meteor Observers. IMO, Potsdam.

See Also

filter,filter.totcor

Examples

# NOT RUN {
## select visual meteor data for the period between 15-30th October 2005 and 
## correction factor for field-of-view obstruction below 1.25 (p=20%)

## rate data for the year 2005
data(rate05)
rateOct<-filter.datetime(rate05,year=2005,month.beg=10,day.beg=15,day.end=30)
filter.F(rateOct,F.up=1.25)
# }