Changes between Version 47 and Version 48 of doc/tec/radiation

Timestamp:

Jun 12, 2019 10:35:16 AM (6 years ago)

Author:

maronga

Comment:

--

doc/tec/radiation

@@ -58 +58 @@
 #!Latex
 \begin{equation*}
-SW_\mathrm{in} = S_0\ \tau\ \sin(\varPsi) 
+SW_\mathrm{in} = S_0\ \tau\ \cos(\varPsi) 
 \end{equation*}
 }}}
@@ -65 +65 @@
 #!Latex
 $S_0 = 1368 W m^{-2}$: Solar constant\\
-$\varPsi$: Zenith angle
+$\varPsi$: Zenith angle, depending on time, date and location.
 }}}
 and the transmissivity of the atmosphere ''τ'':
@@ -71 +71 @@
 #!Latex
 \begin{equation*}
-\tau = 0.6 + 0.2\ \sin(\varPsi) 
-\end{equation*}
-}}}
-''ψ'' is the cosine of the zenith angle, depending on time, date and location. Input parameters are
+\tau = 0.6 + 0.2\ \cos(\varPsi) 
+\end{equation*}
+}}}
+Input parameters are
 * day of year (1-365)
 * UTC time (0:00 - 23:59)
@@ -103 +103 @@
 where ''t'',,UTC,, is the current UTC time and ''lon'' is longitude.
 
-The cosine of the zenith angle ''Z'' is computed as
-{{{
-#!Latex
-\begin{equation*}
-Z = \sin(lat) \sin(D) + \cos(lat) \cos(D) \cos(H)
+The cosine of the zenith angle ''ψ'' is computed as
+{{{
+#!Latex
+\begin{equation*}
+\cos(\varPsi) = \sin(lat) \sin(D) + \cos(lat) \cos(D) \cos(H)
 \end{equation*}
 }}}