/
SHReadJPL.f95
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SHReadJPL.f95
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subroutine SHReadJPL(filename, cilm, lmax, error, gm, formatstring, exitstatus)
!------------------------------------------------------------------------------
!
! This program will read the file format of spherical harmonic
! coefficients sometimes used by the JPL group into standard arrays for
! of Cilm and the error. In order to for this to work, you need to know
! a priori the maximum spherical harmonic degree of the file.
!
! The input file contains
! 1. comment lines starting with "#"
! 2. GM (optional)
! 3. A list of J_l, which is -C(1,l+1,1)
! 4. A list of the cosine and sine terms
! 5. Starting from 2, the same thing over for the errors.
!
! Calling Parameters
!
! IN
! filename The name of the file.
! lmax Maximum spherical harmonic degree.
!
! OUT
! cilm An array of the spherical harmonic coefficients.
!
! OPTIONAL
! error An array containing the error coefficients.
! formatstring This is a string containing an I/O specification
! for the numbers of the spherical harmonic
! coefficients.
! exitstatus If present, instead of executing a STOP when an error
! is encountered, the variable exitstatus will be
! returned describing the error.
! 0 = No errors;
! 1 = Improper dimensions of input array;
! 2 = Improper bounds for input variable;
! 3 = Error allocating memory;
! 4 = File IO error.
!
! Copyright (c) 2016, SHTOOLS
! All rights reserved.
!
!------------------------------------------------------------------------------
implicit none
character(*), intent(in) :: filename
integer, intent(in) :: lmax
real*8, intent(out) :: cilm(:,:,:)
real*8, intent(out), optional :: error(:,:,:), gm(2)
integer, intent(out), optional :: exitstatus
character, intent(in), optional :: formatstring*6
real*8 :: gm1, gm2
logical :: gmpresent
integer l, m, stat, i, ll1, mm1, ll2, mm2, skip
character :: c*4, s*4, j*4, dumb*14, dumb2*14, js*4, cs*4, ss*4, inum*2
if (present(exitstatus)) exitstatus = 0
if (size(cilm(:,1,1)) < 2 .or. size(cilm(1,:,1)) < lmax+1 .or. &
size(cilm(1,1,:)) < lmax+1) then
print*, "Error --- SHReadJPL"
print*, "CILM must be dimensioned (2, LMAX+1, LMAX+1) " // &
"where LMAX is ", lmax
print*, "Input array is dimensioned ", size(cilm(:,1,1)), &
size(cilm(1,:,1)), size(cilm(1,1,:))
if (present(exitstatus)) then
exitstatus = 1
return
else
stop
end if
end if
if (present(error)) then
if (size(error(:,1,1)) < 2 .or. size(error(1,:,1)) < lmax+1 .or. &
size(error(1,1,:)) < lmax+1) then
print*, "Error --- SHReadJPL"
print*, "error must be dimensioned (2, LMAX+1, LMAX+1) " // &
"where LMAX is ", lmax
print*, "Input array is dimensioned ", size(error(:,1,1)), &
size(error(1,:,1)), size(error(1,1,:))
if (present(exitstatus)) then
exitstatus = 1
return
else
stop
end if
end if
end if
gmpresent = .false.
c = "OBAC"
cs = "SIGC"
s = "OBAS"
ss = "SIGS"
j = "OBAJ"
js = "SIGJ"
if (lmax <= 99) then
inum = "i2"
else if (lmax >= 100 .and. lmax <=999) then
inum = "i3"
else
inum = "i4"
end if
open(13,file=filename)
! Skip past header lines
skip = 0
do
read(13,"(a)", iostat=stat) dumb
if (stat /= 0) then
print*, "Error --- SHReadJPL"
print*, "Problem reading header lines of ", filename
if (present(exitstatus)) then
exitstatus = 4
return
else
stop
end if
end if
if (dumb(1:1) == "#") then
skip = skip + 1
else
exit
end if
end do
! Try to read GM, if present
rewind(13)
do i = 1, skip, 1
read(13, *, iostat=stat)
end do
read(13, "(a12, f14.6)", iostat=stat) dumb, gm1
if (stat /= 0) then
print*, "Error --- SHReadJPL"
print*, "Problem reading GM(1)"
if (present(exitstatus)) then
exitstatus = 4
return
else
stop
end if
end if
if (dumb(2:3) == "GM") then
if ( present(gm) ) then
gm(1) = gm1
gmpresent = .true.
end if
else
rewind(13)
do i = 1, skip, 1
read(13,*)
end do
end if
! Start reading J_l coefficients
do i = 1, lmax
if (present(formatstring)) then
read(13,"(1x, a5, "//inum//", 5x,"//formatstring//")", &
iostat=stat) dumb, l, cilm(1,i+1,1)
else
read(13,"(1x, a5, "//inum//", 5x, e19.12)", iostat=stat) dumb, &
l, cilm(1,i+1,1)
end if
if (stat /= 0) then
print*, "Error --- SHReadJPL"
print*, "Problem reading file", i
if (present(exitstatus)) then
exitstatus = 4
return
else
stop
end if
else if (dumb(1:4) /= j) then
print*, "Error --- SHReadJPL"
print*, "Problem with line specifiers in file ", filename
print*, "Read sring = ", dumb(1:4)
print*, "Expected string = ", j
if (present(exitstatus)) then
exitstatus = 4
return
else
stop
end if
else if (i /= l) then
print*, "Error --- SHReadJPL"
print*, "Problem with indices in file ", filename
print*, "Read indice = ", l
print*, "Expected indice = ", i
if (present(exitstatus)) then
exitstatus = 4
return
else
stop
end if
end if
cilm(1,i+1,1) = -cilm(1,i+1,1)
end do
! Read the Clm and Slm coefficients
do l = 1, lmax
do m = 1, l
if (present(formatstring)) then
read(13, "(1x, a5, "//inum//", 1x, "//inum//", 5x," &
//formatstring//", 5x, a5, "//inum//", 1x, " &
//inum//", 5x,"//formatstring//")", &
iostat=stat) dumb, ll1, mm1, cilm(1,l+1,m+1), &
dumb2, ll2, mm2, cilm(2,l+1,m+1)
else
read(13,"(1x, a5, "//inum//", 1x, " &
//inum//", 5x, e19.12, 5x, a5, "//inum//", 1x, " &
//inum//", 5x, e19.12)", iostat=stat) dumb, ll1, mm1, &
cilm(1,l+1,m+1), &
dumb2, ll2, mm2,&
cilm(2,l+1,m+1)
end if
if (stat /= 0) then
print*, "Error --- SHReadJPL"
print*, "Problem reading file", l, m
if (present(exitstatus)) then
exitstatus = 4
return
else
stop
end if
else if (dumb(1:4) /= c .or. dumb2(1:4) /= s) then
print*, "Error --- SHReadJPL"
print*, "Problem with line specifiers in file ", filename
print*, "Read srings = ", dumb(1:4), dumb2(1:4)
print*, "Expected strings = ", c, s
if (present(exitstatus)) then
exitstatus = 4
return
else
stop
end if
else if (ll1 /= l .or. ll2 /= l .or. mm1 /= m .or. mm2 /= m ) then
print*, "Error --- SHReadJPL"
print*, "Problem with indices in file ", filename
print*, "Read indices (l1, m1), (l2, m2) = ", ll1, mm1, ll2, mm2
print*, "Expected indices (l, m) = ", l, m
if (present(exitstatus)) then
exitstatus = 4
return
else
stop
end if
end if
end do
end do
! Next read uncertainties
if (present(error)) then
if (gmpresent) then
read(13, "(a12, f17.6)", iostat=stat) dumb, gm2
gm(2) = gm2
if (stat /= 0) then
print*, "Error --- SHReadJPL"
print*, "Problem reading GM(2)"
if (present(exitstatus)) then
exitstatus = 4
return
else
stop
end if
end if
end if
do i = 1, lmax
if (present(formatstring)) then
read(13,"(1x, a5, "//inum//", 5x,"//formatstring//")", &
iostat=stat) dumb, l, error(1,i+1,1)
else
read(13,"(1x, a5, "//inum//", 5x, e19.12)", iostat=stat) &
dumb, l, error(1,i+1,1)
end if
if (stat /= 0) then
print*, "Error --- SHReadJPL"
print*, "Problem reading file during J2 error coefficients", i
if (present(exitstatus)) then
exitstatus = 4
return
else
stop
end if
else if (dumb(1:4) /= js) then
print*, "Error --- SHReadJPL"
print*, "Problem with line specifiers in file ", filename
print*, "Read sring = ", dumb(1:4)
print*, "Expected string = ", js
if (present(exitstatus)) then
exitstatus = 4
return
else
stop
end if
else if (i /= l) then
print*, "Error --- SHReadJPL"
print*, "Problem with indices in file ", filename
print*, "Read indice = ", l
print*, "Expected indice = ", i
if (present(exitstatus)) then
exitstatus = 4
return
else
stop
end if
end if
enddo
do l = 1, lmax
do m = 1, l
if (present(formatstring)) then
read(13, "(1x, a5, "//inum//", 1x, "//inum//", 5x," &
//formatstring//", 5x, a5, "//inum//", 1x, " &
//inum//", 5x,"//formatstring//")", iostat=stat) &
dumb, ll1, mm1, error(1,l+1,m+1), dumb2, ll2, &
mm2, error(2,l+1,m+1)
else
read(13,"(1x, a5, "//inum//", 1x, " &
//inum//", 5x, e19.12, 5x, a5, "//inum//", 1x, " &
//inum//", 5x, e19.12)", iostat=stat) dumb, ll1, mm1,&
error(1,l+1,m+1), dumb2, ll2, mm2, error(2,l+1,m+1)
end if
if (stat /= 0) then
print*, "Error --- SHReadJPL"
print*, "Problem reading file during error coefficients", l, m
if (present(exitstatus)) then
exitstatus = 4
return
else
stop
end if
else if (dumb(1:4) /= cs .or. dumb2(1:4) /= ss) then
print*, "Error --- SHReadJPL"
print*, "Problem with line specifiers in file ", filename
print*, "Read srings = ", dumb(1:4), dumb2(1:4)
print*, "Expected strings = ", cs, ss
if (present(exitstatus)) then
exitstatus = 4
return
else
stop
end if
else if (ll1 /= l .or. ll2 /= l .or. mm1 /= m .or. mm2 /= m ) then
print*, "Error --- SHReadJPL"
print*, "Problem with indices in file ", filename
print*, "Read indices (l1, m1), (l2, m2) = ", ll1, mm1, ll2, mm2
print*, "Expected indices (l, m) = ", l, m
if (present(exitstatus)) then
exitstatus = 4
return
else
stop
end if
end if
end do
end do
end if
close(13)
end subroutine SHReadJPL