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:

• Correct answer

  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)