Rho_loc: Gives the air density for a certain location.

In Bolshom/optimumtt: A colection of functions to help cyclists.

Description

Returns air density, of a given location, by using the package "darksky."

Usage

Rho_loc(Ta, La, date)

Arguments

Ta	Latitude of a given location.
La	Longitude of a given location.
date	Date and time to get the weather report. Check example for input format.

Details

To use the package "darksky" to collect weather report, you must activate the API with your key. Check https://darksky.net/dev for more info.

Value

b	The air density in kg/m^3 of a given location.

Author(s)

Natan Freitas Leite.

References

https://www.gribble.org/cycling/air_density.html

Examples

## The function is currently defined as
function (Ta, La, date)
{
    clim = climate(Ta, La, date)
    t = clim[1]
    t.dew = clim[2]
    hpa = clim[3]
    b = ((P.d(hpa, t.dew)/(287.0531 * (t + 273.15))) + (P.v(t.dew)/(461.4964 *
        (t + 273.15))))
    return(b)
  }

##latitude (T) and longitude (L) for S<c3><a3>o Francisco, Niter<c3><b3>i, Brazil
##cycling circuit:
Ta=-22.915396
La=-43.095511
date="2018-04-12T19:00:00"
rho=Rho_loc(Ta,La,date)
rho

Bolshom/optimumtt documentation built on May 24, 2019, 8:56 a.m.