The LF/MF domain

This domain covers LF (low frequency) and MF (medium frequency) sound broadcasting. This is a separate domain because LF/MF notices and assignments often have different parameters for their daytime and nighttime operations because of the different propagation conditions during daytime and nighttime. The LF/MF structure in TerRaBase takes this into account.

The database tables in the LF/MF portion of TerRaBase have names beginning with lfmf. The LF/MF database tables are:

These LF/MF database tables implement the following conceptual structure:

Each notice or assignment has a row in the lfmf_terra table. Each operation (i.e., a daytime operation or a nighttime operation) has a row in lfmf_r13_oper (if it is in Region 1 or 3) or in lfmf_r2_oper (if it is in Region 2).