Table 2: Summary table of the main features of wet mapping functions.
Code |
Reference |
Impute parameters |
εmin˚ |
SA |
Saastamoinen (1987) |
z, T0, eo |
10˚ |
HO |
Hopfield (1971) |
ε, T0, eo |
** |
BL |
Black (1978) |
ε, T0, eo, r |
5˚ |
CH |
Chao (1972) |
ε |
10˚ |
IF |
Ifadis (1986) |
ε, t0, eo, P0 |
2˚ |
HE |
Herring (1992) |
ε, t0, φ, Ho |
3˚ |
NI |
Niell (1993) |
ε, φ |
3˚ |
MO |
Moffett (1973) |
ε |
2˚ |
B & E |
Black and Eisner (1984) |
ε |
7˚ |
UNBabc |
Gue J. and Langley R. (2003), |
ε, φ, H0 |
2˚ |
where: φ is the station latitude, H is the station height, r is the effective radius of the station, T0 is the temperature at site in K˚, t0 is the temperature at site in ˚C, e0 is the partial water vapor pressure in (mb), z is the zenith angle and ε is the elevation angle. ** Means that: not specified or valid for any elevation angle.