This function runs TUV online by reading the input parameters, and summarizes the results to the new dataframe.
Usage
tuv_core(
wStart = 280,
wStop = 420,
wIntervals = 140,
inputMode = 0,
latitude = 0,
longitude = 0,
date = 20150630,
timeStamp = "12:00:00",
zenith = 0,
ozone = 300,
albedo = 0.1,
gAltitude = 0,
mAltitude = 0,
taucld = 0,
zbase = 4,
ztop = 5,
tauaer = 0.235,
ssaaer = 0.99,
alpha = 1,
time = 12,
outputMode = 2,
nStreams = -2,
dirsun = 1,
difdn = 1,
difup = NA
)Arguments
- wStart
Shortest wavelength. The default value is 280.
- wStop
Longest wavelength. The default value is 420.
- wIntervals
Number of equal-sized subdivisions of the range End-Start. The default value is 140.
- inputMode
The default value is 0. InputMode 0: User-specified geographic location and time/date. The code computes the appropriate solar zenith angle and Earth-Sun distance. InputMode 1: User specifies the solar zenith angle, and the annual average Earth-Sun distance is used. To avoid inconsistencies (e.g. overhead sun at the poles), options 1 and 2 cannot be invoked at the same time.
- latitude
Latitudes: positive North of equator, negative South of equator. The default value is 0.
- longitude
Longitudes: positive East of the Greenwich meridian, negative West of the Greenwich meridian. The default value is 0.
- date
Date (format: (YYYYMMDD, GMT). The default value is 20150630.
- timeStamp
-> Timestamp (format: hh:mm:ss, GMT). The default value is "12:00:00".
- zenith
Solar zenith angle (deg). The default value is 0.
- ozone
Ozone column, in Dobson Units (du), vertical, from ground (even if above sea level) to space. The US Standard Atmosphere O3 is used to specify the shape of the vertical profile but the total column is re-scaled to the value selected here by the user. The default value is 300.
- albedo
Surface albedo: Assumes a Lambertian reflection (isotropic radiance) Values for snow can reach 0.90-0.99, but otherwise values at UV wavelengths are in the range 0.02-0.20 depending on the precise surface. The default value is 0.1.
- gAltitude
Ground elevation: The elevation of the ground, in km above mean sea level. The default value is 0.
- mAltitude
Measurement altitude: The altitude in the atmosphere for which results are requested. This should not be confused with the ground elevation. For example, if you have measurements made from an airplane, flying at 6 km above the ground, and the surface is at 1.5 km, then you will want to request results for a measurement altitude of 7.5 km asl. The default value is 0.
- taucld
Cloud Optical Depth: vertical optical depth of the cloud. The default value is 0.00.
- zbase
Cloud base: base of cloud, in km (asl). The default value is 4.00.
- ztop
Cloud top: top of cloud, in km (asl). The default value is 5.00.
- tauaer
Optical Depth: total extinction (absorption + scattering) at 550 nm, vertical, from ground to space. The default value is 0.235.
- ssaaer
Single Scattering Albedo (S-S alb), assumed independent of wavelength. The default value is 0.990.
- alpha
Alpha (Angstrom exponent), gives wavelength dependence of optical depth, by multiplying the 550 nm value by (550 nm/wavelength, nm)**alpha. The default value is 1.000.
- time
Hour. The default value is 12.
- outputMode
The default value is 2. OutputMode 2: Molecular photolysis frequencies (109 photoreactions). OutputMode 3: Weighted irradiance (27 weighting functions). OutputMode 4: Spectral actinic flux. OutputMode 5: Spectral irradiance.
- nStreams
The default value is -2. NStreams -2: Pseudo-spherical 2 streams (faster, less accurate). NStreams 4: Pseudo-spherical discrete ordinate 4 streams (slower, more accurate).
- dirsun
Direct beam, direct solar beam. The default value is 1.0.
- difdn
Diffuse down, down-ward propagating scattered radiation (diffuse sky light). The default value is 1.0.
- difup
Diffuse up, up-ward propagating scattered radiation (diffuse light from below). The default value is NA.