Novatel OM-20000041 用户手册

4

Message Formats

54

 MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1

$RTCM16,6649404045495E5A5C406A58696D76596D5F665F765869694D4E53604D
70696552567E7B675762747B67576C574E596F59697146555A75516F5F667D4967
5656574E53604D55565A6D69647B67777E454659685D56465A67616E4B7E7F7F7D
*52[CR][LF]

This message is the binary code equivalent of the special message entered using the RTCM16T command.

Message ID = 43

Message byte count = variable

This message is used at the remote station to report the contents of a Type 16 message that was received from the
reference station.

$RTCM16T,Time flies like an arrow; fruit flies like a banana.*1F

[CR][LF]

This log contains the raw carrier phase raw pseudorange measurement information. The measurements are not
corrected by the ephemerides contained in the satellite message. Word 3, the first data word after the header,
contains a GPS TIME OF MEASUREMENT field which is used to increase the resolution of the MODIFIED Z-
COUNT in the header. Word 3 is followed by pairs of words containing the data for each satellite observed.
Appropriate flags are provided to indicate L1, L2, ionospheric free pseudorange or ionospheric diffeerence carrier
phase data, C/A or P-code, and half or full-wave L2 carrier phase measuurements. The carrier smoothing interval
for pseudoranges and pseudorange corrections is also furnished, for a total frame length of six 30 bit words (180
bits maximum). 

(Follows the RTCM SC-104 Standard for a Type 18 and Type 19 message)

For RT-2, you may periodically transmit an RTCM Type 18 and RTCM Type 19 (RTCM1819) together with an
RTCM Type 3 message (see Page 18).

Message Type 22 provides firstly, a means of achieving sub-millimeter precision for base station coordinates in a
kinematic application, and secondly, base station antenna height above a base, which enables mobile units to
reference measured position to the base directly in real time.

The first data word of message Type 22 provides the corrections to be added to each ECEF coordinate. Note that
the corrections may be positive or negative.

The second data word, which may not be transmitted, provides the antenna L1 phase center height expressed in
integer and fractional centimeters, and is always positive. It has the same resolutions as the corrections. The range
is about 10 meters. The spare bits can be used if more height range is required.

RTCM Type 59 messages are reserved for proprietary use by RTCM reference station operators.

Each message is variable in length, limited only by the RTCM maximum of 990 data bits (33 words maximum).
The first eight bits in the third word (the word immediately following the header) serve as the message
identification code, in the event that the reference station operator wishes to have multiple Type 59 messages.

NovAtel has defined only a Type 59N-0 message to date; it is to be used for operation in GPSCard receivers

$RTCM16T

ASCII Special Message of up to 90 characters

*xx

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