This is an example for a project to convert a series of FCNT files to SDS. The software is able to walk recursively in the subfolders:
# This is a template config file
UTM_zone = 34S
["data_folders"]
[["data_folder1"]]
folder = "/mnt/hard_drive/testdata"
format = FAIRFIELD_FCNT
recursive = False
["export_to_sds"]
components = HHZ,HHN,HHE
sds_root = SDS
sampling_rates = raw, 50
response_root = RESP
The next step is to run the largen index command that will list all files matching *.fcnt in the folder.
Once files have been listed, they will be read and indexed. The index will be saved in a local LARGEN folder in the
h5 format. This indexation allows to rapidly access waveform data in the files.
One finished, the largen index process will output a new file in the project directory called metadata.csv.
If UTM_zone was provided in the config.ini, the X and Y UTM coordinates from the FCNT files are already
converted to Latitude and Longitude.
The next step for the user is to create a copy of the metadata_csv and call it metadata_UPDATED.csv. In this
file, the user is expected to input the seed_id. Seed IDs are compulsory to convert the FCNT files to SDS. The IDs
need to be provided in the NET.STA.LOC.CHAN format, e.g BE.TOM.00.HHZ, even if the FCNT file contains three
channels (the HHZ will be replaced on the fly when converting or preparing the response files).
The Latitude/Longitude can also be changed in the metadata_UPDATED.csv files, as the X,Y coordinates in the FCNT
file could be the pre-planned locations, but not the final locations.
largen convert will make use of metadata_UPDATED.csv to list the files to convert to SDS. This step will convert
the content of FCNT files to SDS, using the export_to_sds configuration parameters. The sampling_rates can be
unique (but followed by a comma, e.g. 50,) or a list (raw, 50). If decimation is required, the input streams
will be filtered using a lowpass Cheby2 filter with maxorder=12 (!not zero-phase!).
Once done, you should have three new subfolders: LARGEN containing the indexes, SDS containing the converted
data streams (1 subfolder per sampling_rate) and RESP containing the responses of the FF 5Hz in xseed format (1 file
per channel, thus 3 per station).