3.3.2. Observations File¶
This file is input when forward modeling or inverting field-collected data. Using 8 columns, the observation file indexes the frequencies, transmitters and receivers used for each measurement as well as the field observations and data uncertainties. Each row defines a unique field measurement. The general format is as follows:
Blue hyperlinked entries are values specified by the user
To omit a particular datum in the inversion, used the flag -99 on its corresponding uncertainty.
- Due to the way the forward problem is solved, it is imperative that the user sort the observations:
First by transmitter
Next by frequency
Then finally by receiver
tx_ind: The index corresponding to the desired transmitter within the transmitter file.
f_ind: The index corresponding to the desired frequency within the frequencies file.
rx_ind: The index corresponding to the desired receiver within the receiver file.
1: As of May 2018, a flag value of 1 is entered here. In future iterations of the code, this entry may be related to additional functionality.
data_real: The real component of the observed data.
unc_real: The uncertainty for the real component of the observed data.
data_imag: The imaginary component of the observed data.
unc_imag: The uncertainty for the real component of the observed data.