APRS Packet Structure
An APRS packet includes an originating station, a destination identifier, an optional path and an information field.
SOURCE>DESTINATION,PATH:information fieldThe information field tells receiving software whether the packet carries a position, message, object, telemetry or another APRS data type.
Why it matters
Section titled “Why it matters”Reading the parts separately is the quickest way to diagnose a packet that is not displayed as expected.