BNC allows to process several orbit and clock corrections streams in real-time to produce, encode, upload and save a combination of Broadcast Corrections from various providers. It is so far only the satellite clock corrections which are combined while orbit corrections in the combination product as well as the product update rates are just taken over from one of the incoming Broadcast Correction streams. Combining only clock corrections using a fixed orbit reference has the possibility to introduce some analysis inconsistencies. We may therefore eventually consider improvements on this approach. The clock combination can be based either on a plain 'Single-Epoch' or on a 'Kalman' Filter approach. @@ -1599,5 +1599,5 @@
-In view of IGS real-time products, the 'Combination' functionality has been integrated in BNC because +In view of IGS real-time products, the 'Combine Corrections' functionality has been integrated in BNC because
-The part of BNC which enables the combination of orbit and clock corrections streams is not intended for publication under GNU General Public License (GPL). However, pre-compiled BNC binaries which support the 'Combination' option will be available for personal usage. -
- -4.13.1 Combination Table - optional
4.13.1 Combine Corrections Table - optional
Hit the 'Add Row' button, double click on the 'Mountpoint' field, enter a Broadcast Corrections mountpoint from the 'Streams' section and hit Enter. Then double click on the 'AC Name' field to enter your choice of an abbreviation for the Analysis Center (AC) providing the stream. Finally, double click on the 'Weight' field to enter a weight to be applied to this stream in the combination. The stream processing can already be started with only one corrections stream configured for combination. @@ -1659,19 +1659,19 @@
-The sequence of entries in the 'Combination Table' is not of importance. Note that the orbit information in the final combination stream is just copied from one of the incoming streams. The stream used for providing the orbits may vary over time: if the orbit providing stream has an outage then BNC switches to the next remaining stream for getting hold of the orbit information.
--Default is an empty 'Combination Table' meaning that you don't want BNC to combine orbit and clock corrections streams. -
--It is possible to specify only one Broadcast Ephemeris corrections stream in the 'Combination Table'. Instead of combining corrections from several sources BNC will then merge the single corrections stream with Broadcast Ephemeris to save results in SP3 and/or Clock RINEX format when specified accordingly under the 'Upload (clk)' tab. +The sequence of entries in the 'Combine Corrections Table' is not of importance. Note that the orbit information in the final combination stream is just copied from one of the incoming streams. The stream used for providing the orbits may vary over time: if the orbit providing stream has an outage then BNC switches to the next remaining stream for getting hold of the orbit information.
++Default is an empty 'Combine Corrections Table' meaning that you don't want BNC to combine orbit and clock corrections streams. +
++It is possible to specify only one Broadcast Ephemeris corrections stream in the 'Combine Corrections Table'. Instead of combining corrections from several sources BNC will then merge the single corrections stream with Broadcast Ephemeris to save results in SP3 and/or Clock RINEX format when specified accordingly under the 'Upload Corrections' tab.
4.13.1.1 Add Row, Delete - optional
-Hit 'Add Row' button to add another row to the 'Combination Table' or hit the 'Delete' button to delete the highlighted row(s). -
- --The following screenshots describe an example setup of BNC when combining Broadcast Correction streams and upload them to an NTRIP Broadcaster. Note that it requires specifying options under tabs 'Combination' and 'Upload (clk)'. The example uses the combination product to simultaneously carry out an 'INTERNAL' PPP solution in Quickstart mode which allows monitoring the quality of the combination product in the space domain. +Hit 'Add Row' button to add another row to the 'Combine Corrections Table' or hit the 'Delete' button to delete the highlighted row(s). +
+ ++The following screenshots describe an example setup of BNC when combining Broadcast Correction streams and upload them to an NTRIP Broadcaster. Note that it requires specifying options under tabs 'Combine Corrections' and 'Upload Corrections'. The example uses the combination product to simultaneously carry out an 'INTERNAL' PPP solution in Quickstart mode which allows monitoring the quality of the combination product in the space domain.
@@ -1686,10 +1686,10 @@Figure 17: 'INTERNAL' PPP with BNC using combined Broadcast Corrections stream.
-4.13.1.2 Method - mandatory if 'Combination Table' is populated
4.13.1.2 Method - mandatory if 'Combine Corrections Table' is populated
Select a clock combination method. Available options are Kalman 'Filter' and 'Single-Epoch. It is suggested to use the Kalman Filter approach in case the combined stream of Broadcast Corrections is intended for Precise Point Positioning support.
-4.13.1.3 Maximal Residuum - mandatory if 'Combination Table' is populated
4.13.1.3 Maximal Residuum - mandatory if 'Combine Corrections Table' is populated
BNC combines all incoming clocks according to specified weights. Individual clock estimates that differ by more than 'Maximal Residuum' meters from the average of all clocks will be ignored.
@@ -1697,13 +1697,13 @@
Default is a 'Maximal Residuum' of 999.0 meters
-4.13.1.4 Sampling - mandatory if 'Combination Table' is populated
4.13.1.4 Sampling - mandatory if 'Combine Corrections Table' is populated
Specify a combination sampling interval. Clock and orbit corrections will be produced following that interval. A value of 10 sec may be an appropriate choice.
- +BNC can upload streams carrying orbit and clock corrections to Broadcast Ephemeris in radial, along-track and cross-track components if they are
-In case the 'Combination Table' contains only one Broadcast Corrections stream, BNC will merge that stream with Broadcast Ephemeris to save results in files specified here through SP3 and/or Clock RINEX file path. In such a case you have to define only the SP3 and Clock RINEX file path and no further options in the 'Upload (clk)' table. +In case the 'Combine Corrections Table' contains only one Broadcast Corrections stream, BNC will merge that stream with Broadcast Ephemeris to save results in files specified here through SP3 and/or Clock RINEX file path. In such a case you have to define only the SP3 and Clock RINEX file path and no further options in the 'Upload Corrections' table.
@@ -2008,5 +2008,5 @@Figure 18: Producing Broadcast Corrections from incoming precise orbits and clocks and uploading them to an NTRIP Broadcaster.
- +BNC can upload a stream carrying Broadcast Ephemeris in RTCM Version 3 format to an NTRIP Broadcaster. @@ -2882,29 +2882,31 @@