Concatenate, Slice and Resample Files

This utility is available from File | GPB Utilities. This utility can be used to:

• Combine multiple GPB files from the same receiver into one. This could be used to combine multiple hourly observations into a larger file prior to processing.

• Resample static data to a higher interval (1 Hz to 10 Hz), or reduce the sampling rate of any file (static or kinematic) to a lower rate (10 Hz to 1 Hz).

• Produce multiple time sliced output files from one larger file (e.g. produce 24 individual hourly files from a single 24 hour file).

Input Files

Use the Add button to locate the input GPB file(s). To concatenate several files, add them all at once as they will be automatically sorted chronologically.

Output File(s)

Determines how the creation and naming of new files is handled. For concatenating files, use the Combine all Input Files into one file option and provide a name for the output GPB file. For resampling or splicing multiple files, use the Process Input Files individually option. The name of the created output files depend on the name of their respective input file and the suffix that is specified. To break up a file into multiple files of n minutes, enable the Break up input files into time sliced output files option.

Time Interval Options

Copy each epoch

Select this if the data rate of the output file is to match that of the input file.

Only keep epochs on interval

Use this when a file is resampled to a lower data rate. The interval specified determines which epochs are copied into the output file.

Resample to higher interval

Use this when a file is resampled to a higher data rate.

Resampling can only be performed on static data.

Time Range Options

Determines the range of time that is to be used for the creation of the new file. Copy all epochs is generally for resampling purposes. Splicing a file requires the selection of either Copy Time Range or Copy Epoch Numbers.