Changeset 1082 in ntrip for trunk/BNC/bnchelp.html

Timestamp:

Aug 30, 2008, 12:30:48 AM (16 years ago)

Author:

weber

Message:

* empty log message *

File:

• trunk/BNC/bnchelp.html (modified) (4 diffs)

trunk/BNC/bnchelp.html

@@ -95 +95 @@
 &nbsp; &nbsp; &nbsp; 3.8.3. <a href=#corrport>Port</a><br>
 &nbsp; &nbsp; &nbsp; 3.8.4. <a href=#corrwait>Wait for Full Epoch</a><br>
+&nbsp; &nbsp; &nbsp; 3.8.5. <a href=#corrlate>Latency Log</a><br>
 3.9. <a href=#advnote>Monitor</a><br>
 &nbsp; &nbsp; &nbsp; 3.9.1. <a href=#obsrate>Observation Rate</a><br>
@@ -478 +479 @@
 When feeding a real-time GNSS engine waiting epoch by epoch for synchronized Ephemeris Corrections, BNC drops (only concering IP port output) whatever is received later than 'Wait for full epoch' seconds. A value of 2 to 5 seconds could be an appropriate choice for that, depending on the latency of the incoming Ephemeris Corrections stream and the delay acceptable by your application. A message such as "COCK1: Correction overaged by 5 sec" shows up in BNC's logfile if 'Wait for full epoch' is exceeded.
 </p>
+<p><a name="corrlate"><h4>3.8.5 Latency Log - optional</h4></p>
+<p>
+Message latencies are logged for streams carrying orbit and clock corrections to Broadcast Ephemeris if option 'Latency log' is ticked.
+</p>
 
 <p><a name="advnote"><h4>3.9. Monitor</h4></p>
@@ -559 +564 @@
     UTC time provided by BNC's host
   - GPS time of currently processed epoch
-  + Leap seconds between UTC and GPS time
+  + Leap seconds between UTC and GPS time, hard-coded to 14
   --------------
   = Latency
 </pre>
 <p>
- BNC can average the latencies per stream over a certain period of GPS time, the 'Performance log' interval. Mean latencies are calculated from the individual latencies of at most one (first incoming) observation or correction to Broadcast Ephemeris per second. Note that computing correct latencies requires the clock of the host computer to be properly synchronized.
+ BNC can average the latencies of observations per stream over a certain period of GPS time, the 'Performance log' interval. Mean latencies are calculated from the individual latencies of at most one (first incoming) observation per second. Note that computing correct latencies requires the clock of the host computer to be properly synchronized.
 </p>
 <p>
@@ -570 +575 @@
 </p>
 <p>
-Latencies of observations or corrections to Broadcast Ephemeris and statistical information can be recorded in the Log file/section at the end of each 'Performance log' interval. A typical output from a 1 hour 'Performance log' interval would be:
+Latencies of observations and statistical information can be recorded in the Log file/section at the end of each 'Performance log' interval. A typical output from a 1 hour 'Performance log' interval would be:
 </p>
 <pre>