MetFns (version 1.0)

filter.time: Selection of visual meteor data by time period

Description

Selects data for a given visual meteor dataset and specified time period.

Usage

filter.time(data, time.low = 0, time.up = 2359)

Arguments

data

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

time.low

numeric vector (0-2359) specifying lower boundary of time in hours and minutes.

time.up

numeric vector(0-2359) specifying upper boundary of time in hours and minutes.

Value

• filter.time returns data frame with the same number of columns as the argument data, containing observations which correspond to the period of time bounded by time.low and time.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.date

Examples

## select visual meteor data for the 12th August 2007, from 2100-2359 UTC.

## rate data for the year 2007
data(rate07)
rate1208<-filter.date(rate07,year=2007,month=8,day.beg=12)
filter.time(rate1208,time.low=2100,time.up=2359)

## magnitude data for the year 2007
data(magn07)
magn1208<-filter.date(magn07,year=2007,month=8,day.beg=12)
filter.time(magn1208,time.low=2100,time.up=2359)