Changeset 7021 in ntrip for trunk/BNC/src
- Timestamp:
- Jul 8, 2015, 11:39:42 AM (9 years ago)
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- 1 edited
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trunk/BNC/src/bnchelp.html
r7020 r7021 450 450 3.13.1.10.1 <a href=#pppsnxtrosampl>Sampling</a><br> 451 451 3.13.2 <a href=#pppStation>PPP (2): Processed Stations</a><br> 452 3.13.2.1 <a href=#ppps tation>Station</a><br>452 3.13.2.1 <a href=#pppsite>Station</a><br> 453 453 3.13.2.2 <a href=#pppnehsigma>Sigma North/East/Up</a><br> 454 454 3.13.2.3 <a href=#pppnehnoise>Noise North/East/Up</a><br> … … 2399 2399 The default value for 'NMEA file' is an empty option field, meaning that BNC will not saved NMEA messages into a file. 2400 2400 </p> 2401 <p> 2402 Note that Tomoji Takasu has written a program named RTKPLOT for visualizing NMEA sentences from IP ports or files. It is available from http://www.rtklib.com and compatible with the 'NMEA file' and port output of BNC's 'PPP' client option. 2403 </p> 2401 2404 2402 2405 <p><a name="pppsnxtrofile"><h4>3.13.1.10 SNX TRO File - optional</h4></p> … … 2491 2494 2492 2495 <p> 2493 This panel allows to enter parameters specific to each PPP process. Individual sigmas for a-priori coordinates and a noise for coordinate variations over time can be introduced. Furthermore, a sigma for model based troposphere estimates and the corresponding noise for troposphere variations can be specified. Finally, local IP ports can be defined for output of NMEA streams carrying PPP results. 2494 </p> 2495 2496 <p><a name="pppstation"><h4>3.13.2.1 Station - mandatory</h4></p> 2497 2496 This panel allows to enter parameters specific to each PPP process or thread. Individual sigmas for a-priori coordinates and a noise for coordinate variations over time can be introduced. Furthermore, a sigma for model based troposphere estimates and the corresponding noise for troposphere variations can be specified. Finally, local IP server ports can be defined for output of NMEA streams carrying PPP results. 2497 </p> 2498 <p> 2499 BNC offers to create a table with one line per PPP process or thread to specify the station sprecific parameters. Hit the 'Add Station' button to create a table or add a new line to it. To remove a line from the table, highlight it by clicking it and hit the 'Delete Station' button. You can also remove multiple lines simultaneously by highlighting them using +Shift and +Ctrl.</p> 2500 </p> 2501 <p> 2502 BNC will only produce PPP solutions for stations which are listed in the 'Station' column of this table. 2503 </p> 2504 2505 <p><a name="pppsite"><h4>3.13.2.1 Station - mandatory</h4></p> 2506 <p> 2507 Hit the 'Add Station' button, double click on the 'Station' field, then specify an observation's mountpoint from the 'Streams' section or introduce the 4-character Station ID of your RINEX observation file and hit Enter. Again, BNC will only produce PPP solutions for stations listed in this table. 2508 </p> 2498 2509 2499 2510 <p><a name="pppnehsigma"><h4>3.13.2.2 Sigma North/East/Up - mandatory</h4></p> 2500 2511 <p> 2501 Enter a sigmas in meters for the initial coordinate compoments. A value of 100.0 (default) may be an appropriate choice. However, this value may be significantly smaller (i.e. 0.01) when starting for example from a station with known position - so-called Quick-Start mode.2512 Enter a sigmas in meters for the initial coordinate compoments. A value of 100.0 (default) may be an appropriate choice. However, this value may be significantly smaller (i.e. 0.01) when starting for example from a station with well known position - so-called Quick-Start mode. 2502 2513 </p> 2503 2514 2504 2515 <p><a name="pppnehnoise"><h4>3.13.2.3 Noise North/East/Up - mandatory</h4></p> 2505 2516 <p> 2506 Enter a sigma in meters for the 'White Noise' ofestimated coordinate components. A value of 100.0 (default) may be appropriate when considering possible sudden movements of a rover.2517 Enter a white 'Noise' in meters for estimated coordinate components. A value of 100.0 (default) may be appropriate when considering possible sudden movements of a rover. 2507 2518 </p> 2508 2519 … … 2514 2525 <p><a name="ppptropnoise"><h4>3.13.2.5 Tropo Noise - mandatory</h4></p> 2515 2526 <p> 2516 Enter a sigmain meters per second to describe the expected variation of the tropospheric effect. Supposing 1Hz observation data, a value of 3e-6 (default) would mean that the tropospheric effect may vary for 3600 * 3e-6 = 0.01 meters per hour.2527 Enter a white 'Noise' in meters per second to describe the expected variation of the tropospheric effect. Supposing 1Hz observation data, a value of 3e-6 (default) would mean that the tropospheric effect may vary for 3600 * 3e-6 = 0.01 meters per hour. 2517 2528 </p> 2518 2529 … … 2521 2532 </p> 2522 2533 <p> 2523 N ASA's 'World Wind' software (see <u>http://worldwindcentral.com/wiki/NASA_World_Wind_Download</u>) can be used for real-time visualization of positions provided through BNC's NMEA IP output port. You need the 'GPS Tracker' plug-in available from <u>http://worldwindcentral.com/wiki/GPS_Tracker</u> for that. The 'Word Wind' map resolution is not meant for showing centimeter level details.2524 </p> 2525 <p> 2526 Note that Tomoji Takasu has written a program called RTKPLOT for visualizing NMEA strings. It is available from <u>http://www.rtklib.com</u> and compatible with the NMEA file and port output of BNC's 'PPP' client option.2534 Note that Tomoji Takasu has written a program named RTKPLOT for visualizing NMEA sentences from IP ports or files. It is available from <u>http://www.rtklib.com</u> and compatible with the NMEA file and port output of BNC's 'PPP' client option. 2535 </p> 2536 <p> 2537 Furthermore, NASA's 'World Wind' software (see <u>http://worldwindcentral.com/wiki/NASA_World_Wind_Download</u>) can be used for real-time visualization of positions provided through BNC's NMEA IP output port. You need the 'GPS Tracker' plug-in available from <u>http://worldwindcentral.com/wiki/GPS_Tracker</u> for that. The 'Word Wind' map resolution is not meant for showing centimeter level details. 2527 2538 </p> 2528 2539 2529 2540 <p><a name="pppOptions"><h4>3.13.3 PPP (3): Processing Options</h4></p> 2530 2541 <p>BNC allows using different Point Positioning processing options depending on the capability of the involved receiver and the application in mind. It also allows introducing specific sigmas for code and phase observations as well as for reference coordinates and troposphere estimates. You may also like to carry out your PPP solution in Quick-Start mode or enforce BNC to restart a solution if the length of an outage exceeds a certain threshold. 2542 </p> 2543 <p> 2544 The intention of this panel is to specify general processing options which are to be applied to all PPP threads carried out in one BNC job. 2531 2545 </p> 2532 2546
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