Description  Claims  Drawing  Cited references 

JP2007309667A   [0003] 
JP2007271429A   [0003] 
US5739785A   [0003] 
US7456943B1   [0003] 
JP2007271627A   [0045] 
JP2013125120A   [0049] 

The Modern Technologies of DGPS and RTK Corrections Transfer   [0003]