Custom Query (104 matches)
Results (19 - 21 of 104)
Ticket | Resolution | Summary | Owner | Reporter |
---|---|---|---|---|
#22 | fixed | ntripcaster streaming latency bug | ||
Description |
Dear BKG staff, we are running BKG Ntripcaster v 2.0.21, and monitoring RTCM3 streaming latencies with BNC Client 2.10 (log latency set to every 5 minutes). We probably found a bug (or something we could not explain) in one of the modules of the BKG Ntripcaster software. The module src/source.c has a variable named READ_RETRY_DELAY The value for this is set to 400. Leaving this value, we observe an unexpected high latencies on all of our data streams. If we change the variable to a lower value (we are currently using READ_RETRY_DELAY value of 50), latencies measured by BNC Client decrease systematically by about 0.5 seconds. The figure attached shows an example for AUCK_RTCM streaming. Red values are the one with READ_RETRY_DELAY set as default (400), whereas green values has this value set to 50. Any comments/suggestions from you would be really appreciated! Thanks, Elisabetta D'Anastasio GNS Science - Te Pu Ao |
|||
#23 | fixed | Time Shift using orbit and clock corrections in Post Processing Mode | ||
Description |
I used BNC (version 2.8 and 2.10) in post processing mode to validate my own software i am currently working on. When i compared the orbits and clocks i found a difference which is caused by the use of the orbit and clock corrections. I attached an advanced log file of BNC. As you can see it seems that their is a shift of one epoch between the orbit and clock corrections and the epoch processed. So in the first epoch at 00:00:00 the corrections of 00:00:30 are applied. In case of the orbits this has almost no effect but it hase a big effect on the clocks. But maybe i am just getting something wrong. Best regards, Fabian |
|||
#24 | fixed | Error description regarding GLONASS clocks sent by Loukis Agrotis | ||
Description |
First message from Loukis:
My suspicion is that there is a problem in using the GLONASS brdc drift term (or a misunderstanding on my part). In any case I am attaching extracts of the BNC decoded CLK files, the batch clock files that are submitted by the ACs, the reconstructed clock files that I generated and the brdc file for the relevant epoch (from CDDIS). Please note that the results I generated (gma, bka, cna, dla) are in exact agreement with the manual reconstruction in the spreadsheet. Also, the GPS results are very close, showing that the GPS satellites are properly encoded and decoded.
Files attached
Test results from Andrè Hauschild:
I conclude from these findings, that your way and my way of converting from RTCM-SSR to SP3 are consistent.
|