-- : + ( / 60) + ( / 3600)
GPS
.... ... GPS ( ) Geodetic or Ellipsoidal Height .... () Orthometric Height ... Geoid Undulation . GPS ( H) GPS ( h) ( N) : H = h N
N . 2008 EGM2008 . 25-35 N GPS .
:
: EGM2008 :
1- ( 69 ) :
http://earth-info.nima.mil/GandG/wgs84/gravitymod/egm2008/EGM2008_to2190_TideFree.gz
2- ( 48 ) :
http://earth-info.nima.mil/GandG/wgs84/gravitymod/egm2008/Zeta-to-N_to2160_egm2008.gz
3- exe ( 0.7 ) :
http://earth-info.nima.mil/GandG/wgs84/gravitymod/egm2008/hsynth_WGS84.exe
4- ( 8 ) :
http://earth-info.nima.mil/GandG/wgs84/gravitymod/egm2008/INPUT.DAT
http://earth-info.nima.mil/GandG/wgs84/gravitymod/egm2008/OUTPUT1.DAT
: :
5- WinRar WinZip
6- . ( Input.Dat) ( Output1.Dat). hsynth_WGS84 Output.dat 3 : Latitude Longitude N Output1.dat .
7- GPS . Input.dat ( NotePad ) : Decimal Degrees :
37.0000000 241.0000000