Globalstar SmartOne - Manual (Page 45)

SmartOne Manual Rev 1.4 DOC# 9100-0268-01 p.45
Transmit interval of diagnostic messages with a transmission rate from 1
to 45 days. The default is 30 days.
Messages
The SMARTONE produces on-air messages conforming to the Globalstar
specified format.
The data being communicated to the end user is contained entirely in the
72 bit (9 byte) field.
This section will describe the use of the 9 byte user information
segment for communicating the range of information that the
SMARTONE is
able to convey to the user.
User information is sometimes referred to as the message payload.
Basic User Information
Global Message Type
Bits 0 and 1 in the first byte of the user data define the Global
Message Type; there are four total global types. Types 0 and 3 are
applicable to the function and features of the
SMARTONE, type 1 and 2 are
user defined message types.
Type 0: Standard Message: All of the various message types
that contain Latitude and Longitude data that are transmitted
by the
SMARTONE will be of this type.
Type 1: Truncated Message: This message type provides for up to 2
bytes plus 6 bits of user data to be appended to the status byte
and GPS location information.
Type 2: Raw Message: This message type provides for up to 8 bytes
plus 6 bits of user data.
Type 3: Non Standard Message: This is the message type that
covers the category “none of the above”. The
SMARTONE will use
this message type for messages that do not contain Latitude
and Longitude data. Smart One message types which fall into this
category include Accumulate/Count messages, Diagnostic messages,
Contact Service Provider messages and Low Battery messages.