BNC has been developed under GNU General Public License (GPL). Binaries for BNC are available for Windows, Linux, and Solaris systems. It is likely that BNC can be compiled on other systems where a GNU compiler and Qt Version 4 are available.
- [Back]
-
Note that IP streaming may be generally denied in a LAN. In such a case you need to request an appropriate modification of the security policy from your network administrator or ask for the installation of a TCP relay to involved NTRIP broadcasters. If that doesn't work out, run BNC on a host that is connected to the Internet through an Internet Service Provider (ISP).
- [Back]
Note that 'Wait for full epoch' does not influence the RINEX file contents. Observations received later than 'Wait for full epoch' seconds will still be included in the RINEX files.
- [Back]
Enter the full path for a file to save synchronized observations in plain ASCII format. Default value is an empty option field, meaning that no ASCII output file is generated.
- [Back]
-BNC makes synchronized observations available in a binary format through an IP port. Enter the port number to activate this function. Default is an empty option field, meaning that no binary output is generated. -
-The binary output is provided in the following format:
-Input from Leos?
- [Back]
+BNC makes synchronized observations available in a binary format through an IP
+port. Enter the port number to activate this function. Default is an empty
+option field, meaning that no binary output is generated.
+
The binary output is provided as a continuous stream +
+begEpoch +begObs +Observation +begObs +Observation +begObs +Observation +... +endEpoch +begEpoch +... ++where the corresponding structures are defined as +
+const char begEpoch = 'A';
+const char begObs = 'B';
+const char endEpoch = 'C';
+struct Observation {
+ char StatID[5+1]; // Station ID
+ char SVPRN; // Satellite PRN
+ short GPSWeek; // Week of GPS-Time
+ int GPSWeeks; // Second of Week (GPS-Time)
+ double sec; // second
+ double C1; // CA or P1-code pseudorange (meters)
+ double P2; // P2-code pseudorange (meters)
+ double L1; // L1-carrier phase (meters)
+ double L2; // L2-carrier phase (meters)
+ short SNR1; // Signal-to noise ratio (0.1 dB)
+ short SNR2; // Signal-to noise ratio (0.1 dB)
+ int pCodeIndicator; // 0 ... CA Code, 1 ... P Code
+ unsigned cumuLossOfCont; // Loss of lock indicator (0 to 31)
+} ;
+
@@ -167,5 +191,4 @@
In case you retrieve streams that show mountpoints with an identical 4Char Station ID (same first 4 characters), the mountpoint string is split in two sub-strings and both become part of the RINEX file name. Example: When simultaneously retrieving data from mountpoints FRANKFURT and FRANCE, there RINEX file names are defined as FRAN*_KFURT.* and FRAN*_CE.*.
- [Back]
Enter a path for saving the RINEX files in a directory. If this directory does not exist, BNC will not generate RINEX files. Default value for 'RINEX directory path' is an empty option field, meaning that streams are not converted to RINEX.
- [Back]
Whenever a RINEX file is generated, you may like to compress, copy, or upload it immediately. For that you enter the full path of a script or batch file carrying out these operations. The RINEX file name will be passed to the script as a command line parameter.
- [Back]
Select the interval for RINEX file generation. Default for 'RINEX file interval' is 15 minutes.
- [Back]
Select the RINEX sample interval in seconds. Zero '0' stands for converting all incoming epochs to RINEX. Default for 'RINEX sampling' is '0'.
- [Back]
Example: Mountpoint FRAN0 leads to the generation of RINEX files FRAN*.*. The header part of this files would be overwritten by the content of an existing skeleton file FRAN.skl in case 'RINEX skeleton extension' is set to 'skl' .
- [Back]
Each stream on an NTRIP broadcaster is defined through a unique source ID called mountpoint. An NTRIP client like BNC can access the data of a desired stream by its mountpoint. Information about mountpoints is available through the sourcetable maintained by the NTRIP broadcaster.
- [Back]
Button 'Add Mountpoints' opens a window that lets you select data streams by their mountpoints.
- [Back]
Enter the NTRIP broadcaster host IP and port number. http://www.rtcm-ntrip.org/home provides information about known NTRIP broadcaster installations. Note that EUREF and IGS operate NTRIP broadcasters at http://www.euref-ip.net/home and http://www.igs-ip.net/home.
- [Back]
Streams on NTRIP broadcasters may be password protected. Enter a valid User ID and Password for access to protected NTRIP broadcaster streams. Accounts are usually provided per NTRIP broadcaster through a registration procedure. Register through http://igs.bkg.bund.de/index_ntrip_reg.htm for access to protected streams on www.euref-ip.net and www.igs-ip.net.
- [Back]
Hit button 'Get Table' to download a sourcetable from the NTRIP broadcaster. Pay attention to data fields 'format' and 'format-details'. Remember that BNC can only decode and convert streams that come in RTCM 2.x, RTCM 3, or RTIGS format. RTCM 2.x streams must contain message types 18 and 19 while RTCM 3 streams must contain message types 1001 or 1003, better 1003 or 1004, see data field 'format-details' for available message types and their repetition rates in brackets. Select your streams line by line, use +Shift and +Ctrl when necessary. Hit 'OK' to return to the main window.
- [Back]
BNC automatically selects one out of several internal decoders for a stream based on its 'format' and 'format-details' as given in the sourcetable. It may happen that you need to overrule the automated decoder selection because of sourcetable setup deficiencies. Therefore BNC allows to edit the decoder part for each stream shown under 'Mountpoints'. Accepted decoder strings allowed to be introduced are 'RTCM_2.x', 'RTCM_3', and 'RTIGS'.
- [Back]
Note that a connection to the NTRIP broadcaster may break or a stream requested may be temporarily unavailable. When this happens, a reconnect is tried with decreasing frequency. BNC first tries to reconnect with 1 second delay, if unsuccessful, tries again in 2 seconds from the last attempt, if still unsuccessful tries with 4 seconds from the last attempt etc. Each attempt doubles the delay from the previous attempt. The maximum delay between attempts is limited to 60 seconds. The reconnection process is documented in 'Log file'.
- [Back]
Hit 'Start' to start retrieving, decoding, and converting GNSS data streams in real-time.
- [Back]
Hit the 'Stop' button to stop BNC.
- [Back]
Note that the self-explaining contents of the configuration file can easily be edited and option -nw is not available under Windows.
- [Back]
Sourcetable records of type NET contain the following data fields: 'identifiey', 'operator', 'authentication', 'fee', 'web-net', 'web-str', 'web-reg', 'misc'.
- [Back]
Copies of RTCM Recommended Standards can be ordered through http://www.rtcm.org/orderinfo.php.
- [Back]
Input from Ken?
- [Back]
Input from Ken?
- [Back]
-
- [Back]
-
+
+ + + +