Transcript PowerPoint Presentation - 12.215 Modern Navigation

Utility Programs and Scripts
Instillation
File conversions
Plotting
Analysis tools
Utility packages in gamit/globk
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The utilities are located to three places:
~/gg/com shell scripts
~/gg/kf/utils programs
~/gg/gamit/utils programs
Use ‘ls’ on above to list, ‘grep #doc *’ in /com to get
one-line description of scripts
• Nearly all of the utilities and shell scripts are self
documenting
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installation scripts
– sh_get_ftp_info - give ftp addresses
– install_software - installs software
– install_updates - installs updates
– Updates from bowie.mit.edu
ftp/pub/gps/updates/incremental_updates
– make_gamit - remakes gamit package
– make_globk -remake globk package
– make_libraries - remakes libraries
– rmfresh - removes all executables and object
modules from gamit/globk directories
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Data archiving scripts
• sh_archive_soln - Saves main files from gamit day
directory in archive structure
• sh_casefold - changes the case of file names either to
upper (u) or to lower (d)
• sh_cleanup - Cleans up day directories by compression
and deletion
• sh_crx2rnx - converts Hatinaka compressed files to rinex
• sh_rnx2cxr - converts rinex to Hatinaks compressed
• sh_dos2unix - Converts dos text files to Unix
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Plot generation
• sh_enf_to_vel - converts ensum and enfit summary
files to standard globk velocity file format. Allows
plotting of globk direct velocity estimates with time
series velocity estimates
• sh_gamit_atmos - plots the atmospheric delays from
gamit solutions
• sh_gamit_baseline - plots baseline from gamit
solutions rather than globk solutions
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Plot generation
(continued)
• sh_glist_gmt - Allows plotting of distribution of stations
in times
• sh_globk_scatter - plots baseline scatter as function of
baseline length
• sh_histogram - plots histogram of position residuals
• sh_plot_profile - used in conjunction with program
profile to plot velocities projected on to a profile.
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Plot generation
(continued)
• sh_plotcrd - plots coordinates as a function of time
• sh_plotvel - draws velocity arrows on a map
• sh_baseline - shows relative postion vectors as a
function of time
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File transfer scripts
• sh_get_hfiles - gets ascii hfiles from SOPAC (usually igs1,
igs2, igs3 the three global networks)
• sh_get_nav - gets navigation files (*.YYn files) from
archives
• sh_get_orbits - gets orbits either sp3 or gamit g-files
(SOPAC only)
• sh_get_raw - Gets raw data for selected sites from SOPAC
• sh_get_rinex - Gets rinex data from cddis, sopac or unavco
• sh_get_stinfo - Gets updated station.info from sopac for the
global network
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Conversion
• sh_glbtosnx - shell to convert binary hfiles to sinex
(uses glbtosnx)
• sh_l_to_xyz - converts gamit l-lfile to XYZ files
• sh_svdiff - Differential positioning using pseudoranges
• sh_svpos - Point positioning using pseudoranges
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Globk utilities
• ~/gg/kf/utils
• These are all programs (directory contains source
code)
• These programs are self documenting
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Conversion programs
• apr_to_vel - converts a globk apr file to velocity format
(sigmas are zero)
• doy - doy converts dates to various formats:
– ***TODAY*** IS:
– Date 2002/01/31 20:38 hrs, DOY 31 JD 2452306.3601
MJD 52305.8601
– GPS Week 1151 Day of week 4, GPS Seconds
345600 Day of Week Thu
– Decimal Year 2002.08455
• gapr_to_l - converts globk apriori file to gamit lfile format
• unify_apr - Allows removal of extra stations, changes of
positions and velocities in globk apriori files.
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Binary h-files and gfiles
• swaph -- switches big-endian to little-endian and visaversa (needed to use SGI binary hfiles on Linux
systems)
• glbtog -- creates gamit g-files from globk solution with
orbits
• glbtosnx – creates a SINEX file from a globk binary hfile; run with ‘-h’ option to get a ascii version of the hfile header
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Velocity field manipulation
• genrelref - Takes standard velocity field file and generates
one as difference from site in list
– (similar to getrel except does not require org file with
BRAT on. Uses velocity files themselves.
– Sigmas may be overestimated.
• velcom - Allows comparison of many velocities files.
• produces average values and RMS of values
• velrot - Allows velocity fields in different frames to be
compared
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Summary
• Utilities do lots of different tasks
• Often you can use them as template to make your
own scripts
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