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read_header_25obs.f
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subroutine read_header_25obs(fileID,rawf,xrec,yrec,zrec,
. iobs,nobs,iymd,station)
c new version (19mar01) taken from my GNSS code
c kristine larson
c allows 20 observables
implicit none
include 'local.inc'
integer i, fileID
character*80 rawf
character*80 line, outline, dynfmt, dynfmt2
logical endofheader
integer nobs,iobs(maxsat), iymd(3), ios
character*2 key(maxsat)
character*4 station
real*8 xrec, yrec, zrec
c returns receiver coordinates
c station name is empty to start with
c returned to main code
station = ' '
endofheader = .false.
open(fileID,file=rawf, status='old',iostat=ios)
if (ios.ne.0) then
print*, 'problem opening RINEX obs file'
print*, 'name:', rawf
call exit(0)
endif
do while (.not.endofheader)
c KL 18mar05, fixed bug on nobs
read (fileID,'(a80)') line
if (line(61:80).eq.'# / TYPES OF OBSERV') then
read(line, fmt='(I6)') nobs
c exit if more than 20 observables
if (nobs.gt.maxob) then
print*,'This code only supports <=',maxob
print*,'You have ', nobs, ' observables'
call exit
endif
c KL 19jan09 allowing more lines of OBS types
c first line has up to 9 OBS types
if (nobs .lt. 10) then
write(dynfmt, fmt='(A, I3.3, A)')
+ "(6X,", nobs, "(4X,A2))"
read(line, fmt=dynfmt) (key(i), i=1,nobs)
c between 10-18 OBS types
elseif (nobs.gt.9.and.nobs.le.18) then
write(dynfmt, fmt='(A, I3.3, A)')
+ "(6X,", 9, "(4X,A2))"
read(line, fmt=dynfmt) (key(i), i=1,9)
c read the next line
read (fileID,'(a80)') line
write(dynfmt, fmt='(A, I3.3, A)')
+ "(6X,", nobs-9, "(4X,A2))"
read(line, fmt=dynfmt) (key(i), i=10,nobs)
c this is more than 18 OBS types
else
c first line
write(dynfmt, fmt='(A, I3.3, A)')
+ "(6X,", 9, "(4X,A2))"
read(line, fmt=dynfmt) (key(i), i=1,9)
c read the next line
read (fileID,'(a80)') line
c reassign this second line
write(dynfmt, fmt='(A, I3.3, A)')
+ "(6X,", 9, "(4X,A2))"
read(line, fmt=dynfmt) (key(i), i=10,18)
c read the third line
read (fileID,'(a80)') line
write(dynfmt, fmt='(A, I3.3, A)')
+ "(6X,", nobs-18, "(4X,A2))"
read(line, fmt=dynfmt) (key(i), i=19,nobs)
endif
print*, 'NUMBER OF OBSERVABLES ', nobs
else if (line(61:80).eq.'APPROX POSITION XYZ') then
read(line, fmt= '(3f14.4)') xrec, yrec, zrec
print*, 'XYZ coordinates ', xrec, yrec, zrec
if (xrec.eq.0) then
print*, 'I cannot compute satellite elevation angles'
print*, 'without apriori receiver coordinates - exiting'
call exit
endif
else if (line(61:77).eq.'TIME OF FIRST OBS') then
read(line, fmt= '(3i6)') iymd(1), iymd(2), iymd(3)
print*, 'Time of first Obs: ', iymd
else if (line(61:71).eq.'MARKER NAME') then
read(line(1:4), fmt= '(a4)') station
print*, 'Station name ', station
endif
if (line(61:73).eq.'END OF HEADER'.or.
+ line(61:73).eq.'end of header'.or.
+ line(61:73).eq.' ') endofheader = .true.
enddo
print*, 'FOUND END OF HEADER'
do i = 1,maxsat
iobs(i) = 0
enddo
do i = 1, nobs
if (key(i).eq.'l1' .or. key(i).eq.'L1') iobs(1) = i
if (key(i).eq.'l2' .or. key(i).eq.'L2') iobs(2) = i
if (key(i).eq.'c1' .or. key(i).eq.'C1') iobs(3) = i
if (key(i).eq.'p1' .or. key(i).eq.'P1') iobs(4) = i
if (key(i).eq.'p2' .or. key(i).eq.'P2') iobs(5) = i
if (key(i).eq.'s1' .or. key(i).eq.'S1') iobs(6) = i
if (key(i).eq.'s2' .or. key(i).eq.'S2') iobs(7) = i
if (key(i).eq.'s5' .or. key(i).eq.'S5') iobs(8) = i
if (key(i).eq.'s6' .or. key(i).eq.'S6') iobs(9) = i
if (key(i).eq.'s7' .or. key(i).eq.'S7') iobs(10) = i
if (key(i).eq.'s8' .or. key(i).eq.'S8') iobs(11) = i
enddo
end