--- ray/doc/man/man1/genssky.1	2024/07/19 23:38:28	1.2
+++ ray/doc/man/man1/genssky.1	2024/10/09 21:10:54	1.4
@@ -1,11 +1,11 @@
-.\" RCSid $Id: genssky.1,v 1.2 2024/07/19 23:38:28 greg Exp $
+.\" RCSid $Id: genssky.1,v 1.4 2024/10/09 21:10:54 greg Exp $
 .TH "GENSSKY" "1" "8/31/24" "RADIANCE" ""
 .SH "NAME"
 genssky - generates a RADIANCE description of the spectral daylight sources
 .br
 
 .SH "SYNOPSIS"
-\fBgenssky month day hour [-y year] [-d AOD] [-c cloud_cover] [-l file] [-p dir] [-g grefl] [-n nproc] [-r res] [-f outname]\fR
+\fBgenssky month day hour [-y year] [-d AOD] [-c cloud_cover] [-l file] [-p dir] [-g grefl] [-L dir_norm_illum dif_hor_illum] [-n nproc] [-r res] [-f outname]\fR
 .br
 
 .SH "DESCRIPTION"
@@ -56,16 +56,19 @@ Non-clear conditions are modeled by linearly interpola
 \fB-o	     Longitude in degree, west positive. Used to calculated solar angle.
 .br
 
-\fB-p	     Set directory to store the precomputed atmopsheric data directory, default=current working directory.
+\fB-p	     Set directory to store the hyperspectral image and precomputed atmopsheric data directory, default=current working directory.
 .br
 
-\fB-r	     Sky and ground hyperspectral image resolution. default=128. Increase this value to reduce artifacts at horizon.
+\fB-r	     Sky hyperspectral image x resolution. default=128. y resolution is half of x resolution.
 .br
 
 \fB-y	     Set year to invoke a more accurate algorithm to calculate solar angles, default=0.
 .br
 
+\fB-L	     Set direct normal and diffuse horizontal illuminance value.
+.br
 
+
 .SH "EXAMPLES"
 To generate a clear sky for March 2th at 3:15pm standard time at a site latitude of 42 degrees, 108 degrees west longitude, and a 110 degrees standard meridian, using 8 threads:
 .br
@@ -78,6 +81,13 @@ For the same sky but with 100 percent total cloud cove
 .br
 
   genssky 3 2 15.25 -a 42 -o 108 -m 110 -n 8 -c 1
+
+.br
+
+For the same sky but with direct normal and diffuse horizontal illuminance of 80000 and 8000 lux:
+.br
+
+  genssky 3 2 15.25 -a 42 -o 108 -m 110 -n 8 -L 80000 8000
 
 .br