mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-29 23:58:39 -05:00
42 lines
1.1 KiB
Fortran
42 lines
1.1 KiB
Fortran
real function dpol(mygrid,hisgrid)
|
|
|
|
! Compute spatial polartzation offset in degrees for the present
|
|
! time, between two specified grid locators.
|
|
|
|
character*6 MyGrid,HisGrid
|
|
real lat,lon,LST
|
|
character cdate*8,ctime2*10,czone*5
|
|
integer it(8)
|
|
data rad/57.2957795/
|
|
|
|
call date_and_time(cdate,ctime2,czone,it)
|
|
nyear=it(1)
|
|
month=it(2)
|
|
nday=it(3)
|
|
nh=it(5)-it(4)/60
|
|
nm=it(6)
|
|
ns=it(7)
|
|
uth=nh + nm/60.0 + ns/3600.0
|
|
|
|
call grid2deg(MyGrid,lon,lat)
|
|
call MoonDop(nyear,month,nday,uth,-lon,lat,RAMoon,DecMoon, &
|
|
LST,HA,AzMoon,ElMoon,vr,dist)
|
|
xx=sin(lat/rad)*cos(ElMoon/rad) - cos(lat/rad)* &
|
|
cos(AzMoon/rad)*sin(ElMoon/rad)
|
|
yy=cos(lat/rad)*sin(AzMoon/rad)
|
|
poloffset1=rad*atan2(yy,xx)
|
|
|
|
call grid2deg(hisGrid,lon,lat)
|
|
call MoonDop(nyear,month,nday,uth,-lon,lat,RAMoon,DecMoon, &
|
|
LST,HA,AzMoon,ElMoon,vr,dist)
|
|
xx=sin(lat/rad)*cos(ElMoon/rad) - cos(lat/rad)* &
|
|
cos(AzMoon/rad)*sin(ElMoon/rad)
|
|
yy=cos(lat/rad)*sin(AzMoon/rad)
|
|
poloffset2=rad*atan2(yy,xx)
|
|
|
|
dpol=mod(poloffset2-poloffset1+720.0,180.0)
|
|
if(dpol.gt.90.0) dpol=dpol-180.0
|
|
|
|
return
|
|
end function dpol
|