The nadir angle should always smaller than 14.0 deg .wrt. Rothacher, M., G. Mader (2003): "Receiver and satellite antenna phase center offsets and variations."  but some times it's a bit bigger than 14.0 deg,so we force it to 14.0 deg to stop throwing an exception. The Reference is available here: http://igscb.jpl.nasa.gov/igscb/resource/pubs/02_ott/session_8.pdf
The nadir angle should always smaller than 14.0 deg .wrt. Rothacher, M., G. Mader (2003): "Receiver and satellite antenna phase center offsets and variations." 
but some times it's a bit bigger than 14.0 deg,so we force it to 14.0 deg to stop throwing an exception.
The Reference is available here: http://igscb.jpl.nasa.gov/igscb/resource/pubs/02_ott/session_8.pdf

git-svn-id: 6625e4d6743179724b113c04fbf297d122273a36@2394 108fab2b-820f-0410-9f2c-e5cc2c41d7be

ianmartin/GPSTk,ianmartin/GPSTk,ianmartin/GPSTk,ianmartin/GPSTk,ianmartin/GPSTk,ianmartin/GPSTk