From f2325cdc75197fd27a779b3e9d979372775f54dc Mon Sep 17 00:00:00 2001
From: Joe Taylor <joe@princeton.edu>
Date: Tue, 2 Oct 2018 12:55:17 -0400
Subject: [PATCH] We might possibly want to use "emedop" again...

---
 lib/emedop.dat |  8 ++++++
 lib/emedop.f90 | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 75 insertions(+)
 create mode 100644 lib/emedop.dat
 create mode 100644 lib/emedop.f90

diff --git a/lib/emedop.dat b/lib/emedop.dat
new file mode 100644
index 000000000..c37d5b85c
--- /dev/null
+++ b/lib/emedop.dat
@@ -0,0 +1,8 @@
+Lat_A     40.35417
+WLong_A   75.62500
+Lat_B     45.1875
+WLong_B   -1.541667
+TxFreqMHz 143.05
+StartTime 20180907 08:00:00
+StopTime  20180907 09:00:00
+StepSec   60.0
diff --git a/lib/emedop.f90 b/lib/emedop.f90
new file mode 100644
index 000000000..4a95fb87a
--- /dev/null
+++ b/lib/emedop.f90
@@ -0,0 +1,67 @@
+program emedop
+
+  real*8 txfreq8
+  real*8 rxfreq8
+  real*4 LST
+  real*4 lat_a
+  real*4 lat_b
+  character*80 infile
+  character*256 jpleph_file_name
+  common/jplcom/jpleph_file_name
+  data jpleph_file_name/'JPLEPH'/
+
+  nargs=iargc()
+  if(nargs.ne.1) then
+     print*,'Usage: emedop <infile>'
+     go to 999
+  endif
+
+  call getarg(1,infile)
+  open(10,file=infile,status='old',err=900)
+  read(10,1001) lat_a
+1001 format(10x,f12.0)
+  read(10,1001) wlon_a
+  read(10,1001) lat_b
+  read(10,1001) wlon_b
+  read(10,1001) txfreq8
+  read(10,1002) nyear,month,nday,ih,im,is
+1002 format(10x,i4,2i2,1x,i2,1x,i2,1x,i2)
+  sec_start=3600.0*ih + 60.0*im + is
+  read(10,1002) nyear,month,nday,ih,im,is
+  sec_stop=3600.0*ih + 60.0*im + is
+  read(10,1001) sec_step
+
+  write(*,1005)
+1005 format('  Date       UTC      Tx Freq      Rx Freq    Doppler'/    &
+            '------------------------------------------------------')
+  
+  sec=sec_start
+  ncalc=(sec_stop - sec_start)/sec_step
+
+  do icalc=1,ncalc
+     uth=sec/3600.0
+     call MoonDopJPL(nyear,month,nday,uth,-wlon_a,lat_a,RAMoon,DecMoon,    &
+          LST,HA,AzMoon,ElMoon,vr_a,techo)
+
+     call MoonDopJPL(nyear,month,nday,uth,-wlon_b,lat_b,RAMoon,DecMoon,    &
+          LST,HA,AzMoon,ElMoon,vr_b,techo)
+  
+     dop_a=-txfreq8*vr_a/2.99792458e5                 !One-way Doppler from a
+     dop_b=-txfreq8*vr_b/2.99792458e5                 !One-way Doppler to b
+     doppler=1.e6*(dop_a + dop_b)
+     rxfreq8=txfreq8 + dop_a + dop_b
+
+     ih=sec/3600.0
+     im=(sec-ih*3600.0)/60.0
+     is=nint(mod(sec,60.0))
+     write(*,1010) nyear,month,nday,ih,im,is,txFreq8,rxFreq8,doppler
+1010 format(i4,2i2.2,2x,i2.2,':',i2.2,':',i2.2,2f13.7,f8.1)
+
+     sec=sec + sec_step
+  enddo
+  go to 999
+900 print*,'Cannot open file ',trim(infile)
+999 end program emedop
+
+  
+