NAME¶
mgd77info - Get information about MGD77[+] files
SYNOPSIS¶
mgd77info NGDC-ids [
-C[
m|
e] ] [
-E[
m|
e] ] [
-Iignore ] [
-Mf[
item]|
r|
e|
h ] [
-L[
v] ]
[
-V ]
DESCRIPTION¶
mgd77info reads <legid>.[mgd77|nc] files and produces a single
record of information about each cruise specified. The information includes
beginning and end times, total track distances in km, longitude and latitude
range, and the total number of geophysical observations. Optionally, choose
instead to see the original MGD77 header meta-data section or its individual
members.
If you need to know which tracks are crossing through a given region and what
kinds of geophysical observations are available, consider using the x2sys
tools to set up a tracks index data base (see
x2sys_init for more
information).
- NGDC-ids
- Can be one or more of five kinds of specifiers:
1) 8-character NGDC IDs, e.g., 01010083, JA010010etc., etc.
2) 2-character <agency> codes which will return all cruises from each
agency.
3) 4-character <agency><vessel> codes, which will return all
cruises from those vessels.
4) =<list>, where <list> is a table with NGDC IDs, one per line.
5) If nothing is specified we return all cruises in the data base.
(See mgd77info -L for agency and vessel codes). The
".mgd77" or ".nc" extensions will automatically be
appended, if needed (use -I to ignore certain file types). Cruise
files will be looked for first in the current directory and second in all
directories listed in $MGD77_HOME/mgd77_paths.txt [If
$MGD77_HOME is not set it will default to
$GMT_SHAREDIR/mgd77].
OPTIONS¶
No space between the option flag and the associated arguments.
- -C
- List abbreviations for all columns present in the MGD77[+]
files. Append m or e to limit the display to the MGD77
standard or MGD77+ extended set only.
- -E
- Give a one-line summary for each cruise listed.
- -M
- List the meta-data (header) and (if present) the MGD77+
history for each cruise. Append f for a formatted display. This
will list individual parameters and their values, one entry per output
line, in a format that can be searched using standard UNIX text tools.
Alternatively, append the name of a particular parameter (you only need to
give enough characters - starting at the beginning - to uniquely identify
the item). Give - to display the list of all parameter names. You may also
specify the number of a parameter. For the raw, punchcard-formatted MGD77
original header block, append r instead. For the MGD77+ E77 status,
append e instead. Finally, for the MGD77+ history, append h
instead.
- -I
- Ignore certain data file formats from consideration. Append
a|c|t to ignore MGD77 ASCII, MGD77+ netCDF, or plain tab-separated
ASCII table files, respectively. The option may be repeated to ignore more
than one format. [Default ignores none].
- -L
- No cruise information is listed. Instead, we just display a
list of the GEODAS institution 2-character codes and their names.
Optionally, append v to also display the vessels and their
4-character codes for each institution. The following is the list of
institutions:
(01) LAMONT (LDEO), (02) WOODS HOLE O.I., (03) NOAA, (04) US ARMY, (05) NEW
ZEALAND, (06) US GEOL. SURVEY, (07) OREGON ST. UNIV, (08) U.HAWAII SOEST,
(09) US NAVY, (10) UNIV OF TEXAS, (11) RICE UNIV., (12) CANADA, (13) UNIV
OF CONN., (14) U.MIAMI (RSMAS), (15) SCRIPPS INST.OC, (16) CHINA, (17) U
RHODE ISLAND, (18) DUKE UNIVERSITY, (19) UNITED KINGDOM, (20)
U.WASHINGTON, (22) WESTERN GEOPHY., (23) TEXAS A&M UNIV., (24)
AUSTRALIA, (25) MONACO, (29) RUSSIA, (30) SPAIN, (35) NIMA, (58)
NETHERLANDS, (60) MIN MGMT SVC, (63) ISRAEL, (67) FRANCE, (71) SOUTH
AFRICA, (75) US COAST GUARD, (76) BRAZIL, (77) INT. GRAV. BUR, (83)
GERMANY, (84) ORSTOM NEW CAL, (86) CUBA, (87) ARGENTINA, (88) US NSF, (89)
INDIA, (90) PORTUGAL, (92) FINLAND, (93) CHILE, (J1) HYDR DEPT JAPAN, (J2)
GEOL SRVY JAPAN, (J4) UNIV TOKYO, (J5) KOBE UNIV, (J7) UNIV OF RYUKYUS,
(J8) J.O.D.C. JAPAN, (J9) CHIBA UNIV, (JA) INST.POLAR RES., (ZZ) INST NOT
CODED.
- -V
- Selects verbose mode, which will send progress reports to
stderr [Default runs "silently"].
EXAMPLES¶
To get one-line summary information about the cruises 01010047.mgd77 and
01010008.mgd77, try
mgd77info 01010047 01010008
-E > listing.lis
To see the original raw MGD77 header meta-data for cruise 01010047.mgd77, run
mgd77info 01010047
-Mr
To determine all the parameters related to Gravity during cruise 01010047.mgd77,
run
mgd77info 01010047
-Mf | grep Gravity
To determine the Magnetic sampling rate used during cruise 01010047.mgd77, run
mgd77info 01010047
-MfMagnetics_Sampling_Rate
To see all the columns that the MGD77+ cruise 01010047.nc contains, run
mgd77info 01010047
-C
To see the E77 status of all MGD77+ cruises collected by the University of
Hawaii, run
mgd77info 08
-Ia -Me
SEE ALSO¶
mgd77list(1),
mgd77manage(1),
mgd77path(1),
mgd77track(1) x2sys_init(1)
REFERENCES¶
Wessel, P., and W. H. F. Smith, 2011, The Generic Mapping Tools (GMT) version
4.5.7 Technical Reference & Cookbook, SOEST/NOAA.
Wessel, P., and W. H. F. Smith, 1998, New, Improved Version of Generic Mapping
Tools Released, EOS Trans., AGU, 79 (47), p. 579.
Wessel, P., and W. H. F. Smith, 1995, New Version of the Generic Mapping Tools
Released, EOS Trans., AGU, 76 (33), p. 329.
Wessel, P., and W. H. F. Smith, 1995, New Version of the Generic Mapping Tools
Released,
http://www.agu.org/eos_elec/95154e.html, Copyright 1995 by the
American Geophysical Union.
Wessel, P., and W. H. F. Smith, 1991, Free Software Helps Map and Display Data,
EOS Trans., AGU, 72 (41), p. 441.
The Marine Geophysical Data Exchange Format - "MGD77", see
http://www.ngdc.noaa.gov/mgg/dat/geodas/docs/mgd77.txt