Reference Manual Instruction Manual

712
Other Procedures & Memos
• Nominal frequency: 5, 10 or 20 MHz
• Permitted deviation around nominal frequency: ± 1 ppm
Decoding an NTRIP Source Table
The NtripCaster maintains a source table containing
information on available NtripSources, networks of
NtripSources, and NtripCasters, to be sent to an NtripClient
on request.
Source-table records are dedicated to one of the following:
• Data STReams (record type STR)
• CASters (record type CAS)
• NETworks of data streams (record type NET)
All data fields in the source-table records are separated using
the semicolon character (;), as a field delimiter. When a semi-
colon is part of the content, it is quoted (“;”)
Source Table
Header
Server: <NtripCasterIdentifier>/<NtripVersion><CR><LF>
Content-Type: text/plain<CR><LF>
Content-Length: <Content-Length><CR><LF>
<CR><LF>
<Content-Length> gives the total size of the source-table
records (a decimal number of bytes).
The actual source-table records follow the header fields.
Data STReam
Record
Below is an example of a data stream record. The table below
describes the syntax used.
STR;BRUS0;Brussels;RTCM2.0;1(1),3(60),16;0;GPS;Misc;BEL;50.80;
4.36;0;0;Ashtech UZ-12;none;B;N;500;ROB
Record
Parameter
Meaning Format
STR Header for “data stream” 3 characters
BRUS0 Caster mountpoint 100 characters max.
Brussels
Source identifier, e.g. name of city next to source
location
Undefined number of
characters
RTCM2.0 Data format
Undefined number of
characters
1(1),3(60)
RTCM message types or raw data format. Update
periods in parenthesis, in seconds
Undefined number of
characters