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•
“Levels_number”: maximum number of levels to be achieved in one tomography
session. If the parameter is not applicable, it will be set to “NA”.
•
“n”: maximum value of parameter n to be applied in a tomography session. If the
parameter is not applicable, it will be set to “NA”.
•
“Electrodes_number”: number of electrodes involved in performing a
tomographic session. If the parameter is not applicable, it will be set to “NA”.
•
“Note”: followed by a free note field (no end-of-line or horizontal tab characters)
of 255 characters. If absent, it is set to “TBD”.
•
“Spare_1”, “Spare_2”, “Spare_3”: parameters for future use, are set to “NA”.
•
“Lap_number”: indicates the sequence number of the file related to a multiple
acquisition. It is set to “0” if the acquisition is not multiple, or to a value from “1” upwards
to identify the sequence number of a cycle relating to a multiple acquisition.
•
“Sigma_max”: maximum sigma value (standard deviation) in percent, calculated
over the repetitions of the single measurement, below which the average of the
measurements is considered reliable.
•
“Frequency”: frequency, in Hertz, at which the measurements were performed.
The values can be: 10, 5, 3, 2.
•
“Max_retry”: maximum number of repetitions for which the single measurement
will be performed, if the maximum Sigma value in percentage is reached, the repetitions
will be stopped. Values can range from 3 to 10.
•
“Max_phase”: value of maximum phase. The values can be: 45, 20, 5.
•
“Multiple_acquisition”: indicates whether the session involves multiple
acquisitions, i.e. the possibility of repeating the same measurements at regular intervals.
Values can be “true” or “false”.
•
“Multiple_interval”: if “Multiple_acquisition” value is set to “true”, it indicates
the value of the repetition interval in seconds. It can be an integer value.
•
“Multiple_number”: if the “Multiple_acquisition” value is set to “true”, it
indicates the number of multiple repetitions to be performed. It can be an integer value.
The following is an example of a GPD file header.
