MetFns (version 2.0)

filter.mag: Selection of visual meteor data by limiting magnitude

Description

Selects data for a given visual meteor dataset and specified limiting magnitude or interval of magnitudes.

Usage

filter.mag(data,mag.low = 3,mag.up = 8)

Arguments

data

data frame consisting of visual meteor data (rate or magnitude data).

mag.low

numeric vector with value between 3 (default) and 8, specifying lower boundary of limiting magnitude.

mag.up

numeric vector with value between 3 and 8 (default), specifying upper boundary of limiting magnitude.

Value

• filter.mag returns data frame with the same number of columns as the argument data, containing observations with the limiting magnitudes between mag.low and mag.up.

References

http://www.imo.net/data/visual Rendtel J. and Arlt R., editors (2008). IMO Handbook For Meteor Observers. IMO, Potsdam.

See Also

filter,filter.totcor

Examples

## select visual meteor data for 13th August 2007, limiting magnitude between 5.5 and 6.5

## rate data for the year 2007
data(rate07)
rate1308<-filter.datetime(rate07,year=2007,month.beg=8,day.beg=13)
filter.mag(rate1308,mag.low=5.5,mag.up=6.5)

## magnitude data for the year 2007
data(magn07)
magn1308<-filter.datetime(magn07,year=2007,month.beg=8,day.beg=13)
filter.mag(magn1308,mag.low=5.5,mag.up=6.5)


## select visual meteor data for the 13th August 2007 and limiting magnitude above 5.5
filter.mag(rate1308,mag.low=5.5)
filter.mag(magn1308,mag.low=5.5)