MetFns (version 3.2.2)

filter.h: Selection of visual meteor data by radiant elevation

Description

Selects data for a given visual meteor dataset, specified shower and its radiant elevation or interval of radiant elevations.

Usage

filter.h(data,shw,h.low = 0,h.up = 90)

Arguments

data

data frame consisting of visual meteor rate data.

shw

character string consisting of three capital letters which represent meteor shower code.

h.low

numeric vector with value between 0 (default) and 90, specifying lower boundary of radiant elevation in degrees.

h.up

numeric vector with value between 0 and 90 (default), specifying upper boundary of radiant elevation in degrees.

Value

filter.h returns data frame containing observations corresponding to the radiant elevation between h.low and h.up.

Details

Radiant elevation h is measured from the observer's horizon towards zenith.

Values from the data frame radiant are used for right ascension and declination of shower radiant.

References

Rendtel J. and Arlt R., editors (2014). Handbook For Meteor Observers. IMO, Potsdam.

See Also

filter,filter.totcor

Examples

# NOT RUN {
## select visual meteor rate data for the elevation of Orionids radiant between 20 and 90 degrees,
## period between 10-25th October 2015
rateOri<-filter.date(rate2015,"2015-10-10","2015-10-25")
filter.h(rateOri,shw="ORI", h.low=20)
# }