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6 Message Formats
MiLLennium Command Descriptions Manual 43
Type 9 messages contain the following information for a group of three satellites in view at the reference station:
• Scale factor
• User Differential Range Error
• Satellite ID
• Pseudorange correction
• Range-rate correction
• Issue of Data (IOD)
RTCM9A
Example:
$RTCM9,66516277547C71435D797760704260596876655F7743585D547562716D7
57E686C5258*6D[CR][LF]
RTCM9B
Message ID = 42 Message byte count = variable
RTCM16 SPECIAL MESSAGE
This log contains a special ASCII message that can be displayed on a printer or cathode ray tube. The GPSCard
reference station wishing to log this message out to remote stations must use the
RTCM16T command to set the
required ASCII text message. Once set, the message can then be issued at the required intervals with the “LOG
port
RTCM16 interval” command. If it is desired that only updated text messages be transmitted, then the GPSCard
log interval must be either “onnew” or “onchanged”. The Special Message setting can be verified in the RCCA
configuration log.
The
RTCM16 data log follows the RTCM Standard Format. Words 1 and 2 contain RTCM header information
followed by words 3 to n (where n is variable from 3 to 32) which contain the special message ASCII text. Up to
90 ASCII characters can be sent with each RTCM Type 16 message frame.
Structure:
(Follows the RTCM Standard SC-104 for a Type 16 message)
RTCM16A
This message is the hexadecimal code equivalent of the special message entered using the RTCM16T command.
Example:
$RTCM16,6649404045495E5A5C406A58696D76596D5F665F765869694D4E53604D
70696552567E7B675762747B67576C574E596F59697146555A75516F5F667D4967
5656574E53604D55565A6D69647B67777E454659685D56465A67616E4B7E7F7F7D
*52
[CR][LF]
RTCM16B
This message is the binary code equivalent of the special message entered using the RTCM16T command.
Message ID = 43 Message byte count = variable
RTCM16T
This message is used at the remote station to report the contents of a Type 16 message that was received from the
reference station.
Structure:
Example:
$RTCM16T,Time flies like an arrow; fruit flies like a banana.*1F[CR][LF]
$RTCM16T ASCII Special Message of up to 90 characters *xx [CR][LF]