利用sh_get_nav 从武汉IGS中心ftp下载 广播星历，涉及修改gamit的2处脚本内容。
第1步 增加ftp_info内容，如下：
# GNSSWHU (China wuhan university )
wuhan address igs.gnsswhu.cn
wuhan login anonymous
wuhan password
wuhan waddress igs.gnsswhu.cn
wuhan wlogin anonymous
wuhan wpassword
wuhan ftp command ftp -inv
wuhan rinex directory /pub/gps/data/daily/YYYY/DDD/YYo
wuhan navalt directory /pub/gps/data/daily/YYYY/DDD/YYn
wuhan sp3 directory /pub/gps/products/GPSW
wuhan ion directory /pub/gps/products/ionex/YYYY/DDD
第2步，修改sh_get_nav脚本，修改后全部脚本内容如下：
#!/bin/csh -f
#
#doc Get rinex navigation files by day number from the CDDIS or SOPAC archives
#doc
#
# Last modified 99/04/15 by Simon McClusky
# MOD OCh 120626: Add wget option
# MOD MAF 170810: Added trap to use ncftp when "ftp" client is actually "gftp", which interacts with the
# server differently to legacy "ftp" and is tricky to use for non-interactive sessions.
######################## INSTRUCTIONS #############################
# See if arguments passed
if( $#argv == 0 ) then
echo "===================================================================================="
echo " Get RINEX navigation files from the CDDIS or SOPAC archives "
echo " "
echo " Usage: sh_get_nav -archive <cddis/sopac> -yr <yr> -doy <doy> -ndays <num> -navdir <navdir> -allnav -ftp_prog <ftp/ncftp>"
echo " "
echo " <archive> Either sopac or cddis [Default sopac] "
echo " <yr> 4 char year of nav data requested [Required] "
echo " <doy> 3 char day of year of nav data requested [Required] "
echo " <num> Number of consecutive days of data to retreive [Default 1] "
echo " <navdir> CDDIS directory for nav files. Defaults to 'navfile', which will get "
echo " GPS-only brdcDDDD.YYn files from standard CDDIS or SOPAC directories"
echo " 'navalt' will look for brdcDDD0.YYn files in the CDDIS RINEX observation directory"
echo " 'navmgex' will get brdmDDD0.YYp from the CDDIS campaign/mgex directory "
echo " <allnav> Retreive all nav files, NOT only combined brdc or auto files. [Default no]"
echo " <ftp/ncftp/wget> select ftp program to use [default is ftp]"
echo " "
echo " Examples: sh_get_nav -yr 2018 -doy 015 -navdir navmgex "
echo " sh_get_nav -archive sopac -yr 1998 -doy 235 -ndays 1 -ftp_prog ncftp"
echo " "
echo "===================================================================================="
exit
endif
##################### SET UP DEFAULTS #############################
set numd = 1
set year = ''
set yr = ''
set doy = ''
set site = ''
set archive = cddis
set navdir = 'navfile'
set allnav = no
set ftp_prog = 'ftp -inv'
set wlogin = '' #OCh
set wgetsite = '' #OCh
set wgetoptions = '' #OCh
##################### DECIPHER COMMAND LINE #######################
while ($#argv > 0 )
set input = ( $argv )
switch($input[1])
case -ar*:
set archive = $input[2]
breaksw
case -nd*:
set numd = $input[2]
breaksw
case -y*:
set year = $input[2]
# Variable yr[1] = 4 char yr, yr[2] = 2 char yr, yr[3] = 1 char yr
set yr = `sh_year -year $year`
breaksw
case -d*:
set doy = `echo $input[2] | awk '{printf" %03d \n", $1}'`
breaksw
case -navdir:
set navdir = $input[2]
breaksw
case -al*:
set allnav = yes
breaksw
case -ftp_prog:
set ftp_prog = $input[2]
breaksw
endsw
if ( $#argv > 0 ) shift argv
end
alldone:
# Added by MAF (2017-08-10, MIT) to check if ftp is aliased or linked to gftp on local machine
# Appended by MAF (2018-06-07, MIT) to check if ftp is missing, e.g. on macOS High Sierra
if ( `echo $ftp_prog | awk '{print $1}'` == 'ftp' && `ftp -v << quit` != '' ) then
if ( `which ncftp` =~ '*ncftp' ) then
set ftp_prog = 'ncftp'
echo 'ftp command aliased or linked to gftp; trying ncftp instead'
else if ( `which wget` =~ '*wget' ) then
set ftp_prog = 'wget'
echo 'ftp command aliased or linked to gftp; trying wget instead'
endif
else if ( `echo $ftp_prog | awk '{print $1}'` == 'ftp' && `which ftp` !~ '*ftp' ) then
if ( `which ncftp` =~ '*ncftp' ) then
set ftp_prog = 'ncftp'
echo 'ftp command not found; trying ncftp instead'
else if ( `which wget` =~ '*wget' ) then
set ftp_prog = 'wget'
echo 'ftp command not found; trying wget instead'
endif
endif
##################### READ THE FTP_INFO TEMPLATE ############################
#
set ftp_info = `sh_get_ftp_info -archive $archive -type $navdir`
while ($#ftp_info > 0 )
set input = ( $ftp_info )
switch($input[1])
case -ftpsite:
set ftpsite = $input[2]
breaksw
case -ftplogin:
set ftplogin = (`echo $ftp_info | cut -d- -f2`); shift ftplogin
breaksw
case -ftpdir:
set ftpdir = $input[2]
breaksw
case -ftpcmd:
set ftpcmd = (`echo $ftp_info | cut -d% -f2`); shift ftpcmd
breaksw
case -wgetsite: #OCh
set wgetsite = $input[2] #OCh
breaksw #OCh
case -wlogin: #OCh
set wlogin = (`echo $ftp_info | cut -d- -f2`); shift wlogin #OCh
breaksw #OCh
endsw
if ( $#ftp_info > 0 ) shift ftp_info
end
echo "Information extracted from ftp_info"
echo "########################################"
echo "ftpsite $ftpsite"
echo "ftplogin $ftplogin"
echo "ftpdir $ftpdir"
echo "ftpcmd $ftpcmd"
if ( $wgetsite != '' ) echo "wgetsite $wgetsite" #OCh
if ( `echo $wlogin | wc -w` > 0 ) echo "wlogin $wlogin" #OCh
echo "########################################"
##################### GET THE JOB DONE ############################
# Set timestamp hostname variable
set ts = "`hostname`:`date +"%H%M%S"`"
# Check all required info given.
if ( ${year} == '' || ${doy} == '' ) then
echo "Not all required fields given -- yr: $year doy: ${doy} --Stop"
exit
endif
# Check if ncftp is requested
if ( `echo $ftp_prog | awk '{print $1}'` == 'ncftp' ) then
if (`echo $ftpcmd | awk '{print $1}'` == 'ftp') then
set ftpcmd = `echo $ftp_prog $ftpsite`
echo "-ftp_prog = ncftp requested, ftpcmd now: $ftpcmd"
endif
endif
# Check if wget is requested #OCh
if ( `echo $ftp_prog | awk '{print $1}'` == 'wget' ) then #OCh
if ( `echo $wlogin | wc -w` == 0 ) set wlogin = `echo $ftplogin` #OCh
if ( $wgetsite == '' ) set wgetsite = `echo ftp://$ftpsite` #OCh
set ftpcmd = `echo $ftp_prog` #OCh
echo "-ftp_prog = wget requested, ftpcmd now: $ftpcmd" #OCh
endif #OCh
# Set up the ftp script
if (`echo $ftpcmd | awk '{print $1}'` == 'ftp') then
set getcmd = 'get'
echo "user $ftplogin" >! tmp.get.$ts
echo "binary" >> tmp.get.$ts
else if (`echo $ftpcmd | awk '{print $1}'` == 'wget') then #OCh
cat /dev/null >! tmp.get.$ts #OCh
if (`echo $wgetsite | awk -F: '{print $1}'` == 'https') set wgetoptions = "--no-check-certificate $wgetoptions" #OCh
else
set getcmd = 'get -f -z'
echo "binary" >! tmp.get.$ts
endif
# Set up the iteration
set sday = $doy
set count = $numd
#---------------------------------------------------------------------------
#---------------------------------------------------------------------------
# ftp to SOPAC and get files
if ( $archive == "sopac" ) then
echo "Getting auto or brdc files for ${yr[1]} ${doy} for ${numd} days from ${ftpsite} "
#
# Now set up the script to get files
set log = `date '+get_nav_sopac_%y%m%d:%H%M.log'` #OCh
while ( $count )
# OLD style cd commands
# echo "cd /pub/nav/${yr[1]}/${sday}" >> tmp.get.$ts
# echo "cd /pub/rinex/${yr[1]}/${sday}" >> tmp.get.$ts
set directory = `echo $ftpdir | sed s/"YYYY"/$yr[1]/ | sed s/"YY"/$yr[2]/ | sed s/"DDD"/${sday}/ | sed s/"SSSS"/${site}/ `
if (`echo $ftpcmd | awk '{print $1}'` == 'wget') then #OCh
if ( $allnav == "no" ) then #OCh
echo "wget $wgetoptions -a $log -O brdc${sday}0.${yr[2]}n.Z $wgetsite$directory/auto${sday}0.${yr[2]}n.Z" >> tmp.get.$ts #OCh
echo "chmod u+w brdc${sday}0.${yr[2]}n.Z" >> tmp.get.$ts #OCh
else #OCh
echo "wget $wgetoptions -a $log $wgetsite$directory/"\""????${sday}0.${yr[2]}n.Z"\" >> tmp.get.$ts #OCh
echo "chmod u+w ????${sday}0.${yr[2]}n.Z" >> tmp.get.$ts #OCh
endif #OCh
else #OCh
echo "cd $directory" >> tmp.get.$ts
if ( $allnav == "no" ) then
echo $getcmd 'auto'${sday}'0.'${yr[2]}'n.Z brdc'${sday}'0.'${yr[2]}'n.Z' >> tmp.get.$ts
else
echo 'mget ????'${sday}'0.'${yr[2]}'n.Z' >> tmp.get.$ts
endif
endif #OCh
@ count = $count - 1
set sday = `echo $sday | awk '{printf" %03d \n", $1 + 1}'`
end
if (`echo $ftpcmd | awk '{print $1}'` != 'wget') echo 'quit' >> tmp.get.$ts #OCh
cat tmp.get.$ts >! $log
echo ' ' >> $log
echo '--------------------' >> $log
if (`echo $ftpcmd | awk '{print $1}'` == 'wget') then #OCh
csh tmp.get.$ts #OCh
else #OCh
$ftpcmd < tmp.get.$ts | grep -v '^230' >> $log
endif #OCh
#
# Now uncompress the brdc
if ( $ftpcmd[1] == "ftp" ) then
grep '^get ' tmp.get.$ts | awk '{print "gunzip -f",$3}' >! tmp.unc.$ts
else if ( $ftpcmd[1] == "ncftp" ) then
grep '^get ' tmp.get.$ts | awk '{print "gunzip -f",$5}' >! tmp.unc.$ts
else if (`echo $ftpcmd | awk '{print $1}'` == 'wget') then #OCh
grep '^ *=>' $log | grep -v .listing | awk '{print "gunzip -f",substr($NF,2,length($NF)-2)}' >! tmp.unc.$ts #OCh
endif
csh tmp.unc.$ts >> $log
\rm tmp.get.$ts tmp.unc.$ts
#
#---------------------------------------------------------------------------
#---------------------------------------------------------------------------
else if ( $archive == "cddis" ) then
if ( $navdir == "navfile" || $navdir == "navalt" ) then
echo "Getting brdc files for ${yr[1]} ${doy} for ${numd} days from ${ftpsite} "
else if ( $navdir == "navmgex" ) then
echo "Getting brdm files for ${yr[1]} ${doy} for ${numd} days from ${ftpsite} "
endif
#
# Now set up the script to get files
set log = `date '+get_nav_cddis_%y%m%d:%H%M.log'` #OCh
while ( $count )
# OLD style cd commands
# echo "cd /pub/gps/gpsdata/brdc/${yr[1]}" >> tmp.get.$ts
# echo "cd /pub/gps/gpsdata/${yr[2]}${sday}/${yr[2]}n" >> tmp.get.$ts
set directory = `echo $ftpdir | sed s/"YYYY"/$yr[1]/ | sed s/"YY"/$yr[2]/ | sed s/"DDD"/${sday}/ | sed s/"SSSS"/${site}/ `
if (`echo $ftpcmd | awk '{print $1}'` == 'wget') then #OCh
if ( $allnav == "no" ) then #OCh
if ( $navdir == "navfile" || $navdir == "navalt" ) then
echo "wget $wgetoptions -a $log $wgetsite$directory/brdc${sday}0.${yr[2]}n.Z" >> tmp.get.$ts #OCh
echo "chmod u+w brdc${sday}0.${yr[2]}n.Z" >> tmp.get.$ts #OCh
else if ( $navdir == "navmgex" ) then
echo "wget $wgetoptions -a $log $wgetsite$directory/brdm${sday}0.${yr[2]}p.Z" >> tmp.get.$ts #OCh
echo "chmod u+w brdm${sday}0.${yr[2]}p.Z" >> tmp.get.$ts #OCh
echo "\mv brdm${sday}0.${yr[2]}p.Z brdc${sday}0.${yr[2]}n.Z" >> tmp.get.#ts #0Ch
endif #OCh
else #OCh
echo "wget $wgetoptions -a $log $wgetsite$directory/"\""????${sday}0.${yr[2]}n.Z"\" >> tmp.get.$ts #OCh
echo "chmod u+w ????${sday}0.${yr[2]}n.Z" >> tmp.get.$ts #OCh
endif #OCh
else #OCh
echo "cd $directory" >> tmp.get.$ts
if ( $allnav == "no" ) then
if( $navdir == "navfile" || $navdir == "navalt" ) then #OCh
echo $getcmd "brdc${sday}0.${yr[2]}n.Z brdc${sday}0.${yr[2]}n.Z" >> tmp.get.$ts
else if ( $navdir == "navmgex" ) then #OCh
echo $getcmd "brdm${sday}0.${yr[2]}p.Z brdc${sday}0.${yr[2]}n.Z" >> tmp.get.$ts #OCh
ls -l *.Z
endif #OCh
else
echo 'mget ????'${sday}'0.'${yr[2]}'n.Z' >> tmp.get.$ts
endif
endif #OCh
@ count = $count - 1
set sday = `echo $sday | awk '{printf" %03d \n", $1 + 1}'`
end
if (`echo $ftpcmd | awk '{print $1}'` != 'wget') echo 'quit' >> tmp.get.$ts #OCh
cat tmp.get.$ts >! $log
echo ' ' >> $log
echo '--------------------' >> $log
if (`echo $ftpcmd | awk '{print $1}'` == 'wget') then #OCh
csh tmp.get.$ts #OCh
else #OCh
$ftpcmd < tmp.get.$ts | grep -v '^230' >> $log
endif #OCh
# Now uncompress the brdc
if ( $ftpcmd[1] == "ftp" ) then
grep '^get ' tmp.get.$ts | awk '{print "gunzip -f",$3}' >! tmp.unc.$ts
else if ( $ftpcmd[1] == "ncftp" ) then
grep '^get ' tmp.get.$ts | awk '{print "gunzip -f",$5}' >! tmp.unc.$ts
else if (`echo $ftpcmd | awk '{print $1}'` == 'wget') then #OCh
grep '^ *=>' $log | grep -v .listing | awk '{print "gunzip -f",substr($NF,2,length($NF)-2)}' >! tmp.unc.$ts #OCh
endif
csh tmp.unc.$ts >> $log
\rm tmp.get.$ts tmp.unc.$ts
#---------------------------------------------------------------------------
#---------------------------------------------------------------------------
#---------------------------------------------------------------------------
#---------------------------------------------------------------------------
else if ( $archive == "wuhan" ) then
if ( $navdir == "navfile" || $navdir == "navalt" ) then
echo "Getting brdc files for ${yr[1]} ${doy} for ${numd} days from ${ftpsite} "
else if ( $navdir == "navmgex" ) then
echo "Getting brdm files for ${yr[1]} ${doy} for ${numd} days from ${ftpsite} "
endif
#
# Now set up the script to get files
set log = `date '+get_nav_cddis_%y%m%d:%H%M.log'` #OCh
while ( $count )
# OLD style cd commands
# echo "cd /pub/gps/gpsdata/brdc/${yr[1]}" >> tmp.get.$ts
# echo "cd /pub/gps/gpsdata/${yr[2]}${sday}/${yr[2]}n" >> tmp.get.$ts
set directory = `echo $ftpdir | sed s/"YYYY"/$yr[1]/ | sed s/"YY"/$yr[2]/ | sed s/"DDD"/${sday}/ | sed s/"SSSS"/${site}/ `
if (`echo $ftpcmd | awk '{print $1}'` == 'wget') then #OCh
if ( $allnav == "no" ) then #OCh
if ( $navdir == "navfile" || $navdir == "navalt" ) then
echo "wget $wgetoptions -a $log $wgetsite$directory/brdc${sday}0.${yr[2]}n.Z" >> tmp.get.$ts #OCh
echo "chmod u+w brdc${sday}0.${yr[2]}n.Z" >> tmp.get.$ts #OCh
else if ( $navdir == "navmgex" ) then
echo "wget $wgetoptions -a $log $wgetsite$directory/brdm${sday}0.${yr[2]}p.Z" >> tmp.get.$ts #OCh
echo "chmod u+w brdm${sday}0.${yr[2]}p.Z" >> tmp.get.$ts #OCh
echo "\mv brdm${sday}0.${yr[2]}p.Z brdc${sday}0.${yr[2]}n.Z" >> tmp.get.#ts #0Ch
endif #OCh
else #OCh
echo "wget $wgetoptions -a $log $wgetsite$directory/"\""????${sday}0.${yr[2]}n.Z"\" >> tmp.get.$ts #OCh
echo "chmod u+w ????${sday}0.${yr[2]}n.Z" >> tmp.get.$ts #OCh
endif #OCh
else #OCh
echo "cd $directory" >> tmp.get.$ts
if ( $allnav == "no" ) then
if( $navdir == "navfile" || $navdir == "navalt" ) then #OCh
echo $getcmd "brdc${sday}0.${yr[2]}n.Z brdc${sday}0.${yr[2]}n.Z" >> tmp.get.$ts
else if ( $navdir == "navmgex" ) then #OCh
echo $getcmd "brdm${sday}0.${yr[2]}p.Z brdc${sday}0.${yr[2]}n.Z" >> tmp.get.$ts #OCh
ls -l *.Z
endif #OCh
else
echo 'mget ????'${sday}'0.'${yr[2]}'n.Z' >> tmp.get.$ts
endif
endif #OCh
@ count = $count - 1
set sday = `echo $sday | awk '{printf" %03d \n", $1 + 1}'`
end
if (`echo $ftpcmd | awk '{print $1}'` != 'wget') echo 'quit' >> tmp.get.$ts #OCh
cat tmp.get.$ts >! $log
echo ' ' >> $log
echo '--------------------' >> $log
if (`echo $ftpcmd | awk '{print $1}'` == 'wget') then #OCh
csh tmp.get.$ts #OCh
else #OCh
$ftpcmd < tmp.get.$ts | grep -v '^230' >> $log
endif #OCh
# Now uncompress the brdc
if ( $ftpcmd[1] == "ftp" ) then
grep '^get ' tmp.get.$ts | awk '{print "gunzip -f",$3}' >! tmp.unc.$ts
else if ( $ftpcmd[1] == "ncftp" ) then
grep '^get ' tmp.get.$ts | awk '{print "gunzip -f",$5}' >! tmp.unc.$ts
else if (`echo $ftpcmd | awk '{print $1}'` == 'wget') then #OCh
grep '^ *=>' $log | grep -v .listing | awk '{print "gunzip -f",substr($NF,2,length($NF)-2)}' >! tmp.unc.$ts #OCh
endif
csh tmp.unc.$ts >> $log
\rm tmp.get.$ts tmp.unc.$ts
#---------------------------------------------------------------------------
#---------------------------------------------------------------------------
else
echo "Archive $archive not available from this script. --Stop"
exit
endif
# Thats all.
exit
第3步，利用这个sh_get_nav命令国内IGS中心下载广播星历
sh_get_nav -archive wuhan -navdir navalt -yr 2018 -doy 001 -ndays 3
结论：
国内下载速度快！！~
另外其他下载内容，修改类似……