MB-System Unix Manual Page

mbctdlist

Section: MB-System 5.0 (1)
Updated: 3 June 2013
Index
 

NAME

mbctdlist - List CTD data in swath sonar data files.

 

VERSION

Version 5.0

 

SYNOPSIS

mbctdlist [-A -Ddecimate -Fformat -Gdelimeter -H -Ifile -Ooutput_format -V -Zsegment]

 

DESCRIPTION

MBctdlist prints the specified contents of CTD records in a swath sonar data file to stdout. CTD stands for conductivity, temperature, and depth (pressure). Some seafoor mapping sonar platforms (e.g. ROVs or AUVs) carry CTDs. The CTD data may be included in the sonar data stream to enable calculation of water sound speed for use in sonar settings and/or data processing. In addition to the raw conductivity (S/m), temperature (degree C), and pressure (dBar) data, salinity (ppu), depth (m), and water sound speed (m/s) are typically available by calculation.MBctdlist can also output navigation and time stamp values. By default, mbctdlist produces ASCII files in spreadsheet style, with data columns separated by tabs. Alternatively, other column delimiters can be used (-G option), or the output can be binary, with each field represented as a double precision float (-A option). The option -Ooutput_format is used to control the data types that are sent to stdout. The output stream can be decimated using the -D option. The output of mbctdlist can be piped to plotting and data analysis programs.

 

MB-SYSTEM AUTHORSHIP

David W. Caress

  Monterey Bay Aquarium Research Institute
Dale N. Chayes

  Center for Coastal and Ocean Mapping

  University of New Hampshire
Christian do Santos Ferreira

  MARUM - Center for Marine Environmental Sciences

  University of Bremen

 

OPTIONS

-A

Causes the output to be binary (native double precision floating point) rather than ASCII. Some output options cannot be represented as single binary floats (e.g. time strings and longitude or latitude broken into degrees and minutes. These values are output as multiple fields as appropriate. Default: ASCII output with fields separated by tabs.
-D
decimate
Sets the decimation of the output data. By default (i.e. decimate=1), every available data record is output. If decimate>1, then only every "decimate"th record will be output. Default: decimate=1.
-F
format
Sets the format for the input swath sonar data using MBIO integer format identifiers. This program uses the MBIO library and will read any swath sonar format supported by MBIO. A list of the swath sonar data formats currently supported by MBIO and their identifier values is given in the MBIO manual page. Default: format = 11.
-G
delimiter
Sets the character(s) used to separate output fields when ascii columns are output. Default: tabs are used as delimiters.
-H
This "help" flag cause the program to print out a description of its operation and then exit immediately.
-I
file
Sets the input filename. If format > 0 (set with the -F option) then the swath sonar data contained in file is read and processed. If format < 0, then file is assumed to be an ascii file containing a list of the input swath sonar data files to be processed and their formats. The program will read the data in each one of these files. In the file file, each data file should be followed by a data format identifier, e.g.:
        datafile.mb88 88

        datafile.mb88 88

This program uses the MBIO library and will read any swath sonar format supported by MBIO. However, only files in formats supporting CTD data will contain relevant data and produce an output. A list of the swath sonar data formats currently supported by MBIO and their identifier values is given in the MBIO manual page. Default: file = "datalist.mb-1".
-L
lonflip
Sets the range of the longitude values returned. If lonflip=-1 then the longitude values will be in the range from -360 to 0 degrees. If lonflip=0 then the longitude values will be in the range from -180 to 180 degrees. If lonflip=1 then the longitude values will be in the range from 0 to 360 degrees. Default: lonflip = 0.
-O
output_format
Determines the form of the output. Output_format is a string composed of one or more of the following characters:


        C  for conductivity (S/m)

        ^C for sonar altitude (meters)

        c  for temperature (degree C)

        ^c for sonar depth (meters)

        H  for heading (degrees)

        h  for course made good (degrees)

        J  for a time string (yyyy jd hh mm ss.ssssss)

                 where jd is the julian day of the year
        j  for a time string (yyyy jd dm ss.ssssss)

                 where jd is the julian day of the year
                 and dm is the minute of the day
        L  for cumulative along-track distance (km)

        l  for cumulative along-track distance (m)

        M  for unix time in decimal seconds since 1/1/70 00:00:00

        m  for time in decimal seconds since first record

        P  for potential temperature (degree)

        S  for salinity (ppu)

        ^S for speed (km/hr)

        s  for water sound speed (m/s)

        ^s for speed made good (km/hr)

        T  for a time string (yyyy/mm/dd/hh/mm/ss)

        t  for a time string (yyyy mm dd hh mm ss)

        U  for unix time in integer seconds since 1/1/70 00:00:00

        u  for time in integer seconds since first record

        V  for ping interval (decimal seconds)

        X  for longitude (decimal degrees)

        x  for longitude (degrees + decimal minutes + E/W)

        Y  for latitude (decimal degrees)

        y  for latitude (degrees + decimal minutes + N/S)

Default output_format = TXYCc^cSs (Time, lon, lat, conductivity, temperature, depth, salinity, sound speed).

-V
Normally, mbctdlist works "silently" without outputting anything to the stderr stream. If the -V flag is given, then mbctdlist works in a "verbose" mode and outputs the program version being used and all error status messages.
-Z
segment
Causes the ascii output of different input swath files (e.g. when a datalist is specified with the -I option) to be separated by lines with segment. If segment is a single character, then the output is a multiple segment file of the sort accepted by the GMT program psxy. This option only works with ascii output, and is thus disabled when the -A option is specified. The most common usage is -ZI>.

 

EXAMPLES

Suppose one wishes to obtain a ctd list from a Reson 7125 data file in the 7k format (MBIO id 88) called 20080904_231809p.mb88. To obtain a listing with time in unix second forms followed by longitude, latitude, and salinity, the following will suffice:


        mbctdlist -i 20080904_231809p.mb88 -OMXYS | more

The output will be as follows:


        1220570288.486000       -129.066699       47.997246     34.305

        1220570288.685999       -129.066702       47.997245     34.304

        1220570288.885999       -129.066706       47.997244     34.305

        1220570289.086000       -129.066710       47.997243     34.305

        1220570289.286000       -129.066713       47.997242     34.304

        .....

 

SEE ALSO

mbsystem(1), mbinfo(1)

 

BUGS

mbctdlist initially only works with data in the MBF_RESON7KR format (MBIO format id 88) supporting Reson 7k series multibeam sonars.


 

Index

NAME
VERSION
SYNOPSIS
DESCRIPTION
MB-SYSTEM AUTHORSHIP
OPTIONS
EXAMPLES
SEE ALSO
BUGS


Last Updated: 3 June 2013