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| author | Mattias Andrée <maandree@operamail.com> | 2014-07-26 11:54:20 +0200 |
|---|---|---|
| committer | Mattias Andrée <maandree@operamail.com> | 2014-07-26 11:54:20 +0200 |
| commit | 1226a9e90044ac1f65b2651ca84fd2c631a25134 (patch) | |
| tree | a4aa32656ed6f8c6a2d39b686501e733025c9449 | |
| parent | update dist (diff) | |
| download | blueshift-1226a9e90044ac1f65b2651ca84fd2c631a25134.tar.gz blueshift-1226a9e90044ac1f65b2651ca84fd2c631a25134.tar.bz2 blueshift-1226a9e90044ac1f65b2651ca84fd2c631a25134.tar.xz | |
doc SOLAR_APPARENT_RADIUS
Signed-off-by: Mattias Andrée <maandree@operamail.com>
| -rw-r--r-- | info/blueshift.texinfo | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/info/blueshift.texinfo b/info/blueshift.texinfo index 4b3dce1..89c7bde 100644 --- a/info/blueshift.texinfo +++ b/info/blueshift.texinfo @@ -1509,6 +1509,17 @@ The Sun's lowest and highest elevation during astronomical twilight, measured in degrees. @end table +Blueshift provides a constant for the apparent +size of the Sun: @code{SOLAR_APPARENT_RADIUS}. +This constant can for example be used to get a +more accurate time when the night begins: rather +than simply saying that the night begins when +the Sun's apparent elevation is zero, you can say +that it begins when the Sun is no longer visible +at all, which is when the Sun's apparent elevation +is minus @code{SOLAR_APPARENT_RADIUS}. This value +is approximate. + @node Weather @section Weather |