From fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4 Mon Sep 17 00:00:00 2001
From: Joseph Hunkeler <jhunkeler@gmail.com>
Date: Wed, 8 Jul 2015 20:46:52 -0400
Subject: Initial commit

---
 noao/astutil/doc/airmass.hlp | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 noao/astutil/doc/airmass.hlp

(limited to 'noao/astutil/doc/airmass.hlp')

diff --git a/noao/astutil/doc/airmass.hlp b/noao/astutil/doc/airmass.hlp
new file mode 100644
index 00000000..b35c461e
--- /dev/null
+++ b/noao/astutil/doc/airmass.hlp
@@ -0,0 +1,31 @@
+.help airmass Mar84 noao.astutil
+.ih
+NAME
+airmass -- compute the airmass at a given elevation above horizon
+.ih
+USAGE
+airmass elevation
+.ih
+PARAMETERS
+.ls elevation
+Elevation above horizon in either degrees or radians.
+.le
+.ls scale = 750.0
+Scale factor of the Earth's atmosphere.
+.le
+.ls radians = no
+Input elevation in radians instead of degrees.
+.le
+.ls airmass
+On output, contains the computed airmass.
+.le
+.ih
+EXAMPLE
+Compute the airmass at an elevation of 30 degrees above the horizon
+
+.nf
+	cl> airmass 30
+	airmass 1.996 at an elevation of 30. degrees (0.5236 radians)
+	above horizon
+.fi
+.endhelp
-- 
cgit 

