data_file data_file_name [error_factor factor] [recode station_recode_file]
data_file data_file_name csv csv_options [error_factor factor] [recode station_recode_file]
data_file data_file_name sinex sinex_options [error_factor factor] [recode station_recode_file]
Specifies a data file containing observations to be used in the adjustment. The data can be either a SNAP, CSV, or SINEX formatted data file.
This command can be repeated as many times as required to specify all the data files being used. The parameters of this command are:
data_file_name
The name of a data file. Each data file needs a separate data_file command.
factor
is a factor by which all observation errors in the file are multiplied.
csv_options
are the options defining how the CSV file is structured. The option "format=dtf_name" defines the format definition file. The default format is "obs". Any other options are dependent on the format definition.
sinex_options
are the options defining how the a SINEX file is read. The option "code=codetype" defines how the station code is taken from the SINEX file. codetype can be either SITE, which just uses the SINEX site code, or POINT, which combines the SINEX site and point codes. The default is SITE. The option "ref_frame=rf_name" defines the reference frame to associate with the observations. The default format is "GNSS". The option "date=obsdate can be used to define a different date for the observations to that in the sinex file header.
The error factor may also be defined by the classification command.
Examples of the data_file command are
data_file traverse.dat
data_file 1614.ha gb error_factor 1.5
data_file vectors.csv csv format=vecc1
The recode option can be used to specify a mapping of station codes in the data file to codes used in SNAP. The option defines the name of a station translation file defining these translations. Translations can also be defined in the snap command file using the recode command.