6A2 - Weather information is commonly sent by radio in map form by one-way facsimile transmission. Two common parameters which must be set by the receiving station are:

D.Index of cooperation (IOC), and revolutions per minute (RPM)

A.Lines-per-inch (LPI), and primary scan direction (PSD)

B.Frequency shift (FS), and phase response pattern (PRP)

C.Black-mode signal (BMS), and frequency jitter tolerance (FJT)