Changeset 6978 in ntrip


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Timestamp:
Jun 29, 2015, 12:59:07 PM (10 years ago)
Author:
weber
Message:

Documentation completed

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  • trunk/BNC/src/bnchelp.html

    r6976 r6978  
    13761376
    13771377<p>
    1378 BNC's Broadcast Correction files contain blocks of records in plain ASCII format. Each block covers information about one sprecific topic and starts with an epoch record with special character '&#62;' being its first character (as we have it in RINEX Version 3).
    1379 </p>
    1380 <p>
    1381 <b>The epoch record of a Broadcast Corrections block</b>
    1382 </p>
    1383 
    1384 <p>
    1385 The leading epoch record of each block in a Broadcast Corrections file contains 10 parameters. Example:
     1378BNC's Broadcast Correction files contain blocks of records in plain ASCII format. Each block covers information about one sprecific topic and starts with an 'Epoch Record'.
     1379</p>
     1380<p>
     1381<b>The 'Epoch Record' of a Broadcast Corrections block</b>
     1382</p>
     1383
     1384<p>
     1385The leading 'Epoch Record' of each block in a Broadcast Corrections file contains 11 parameters. Example:
    13861386</p>
    13871387<pre>
    … …  
    13911391Their meaning is as follows:
    13921392</p>
    1393 <ul>
     1393<ol type="1">
     1394<li>Special character '&#62;' is the first character in each 'Epoch Record' (as we have it in RINEX Version 3)</li>
    13941395<li>SSR message or topic descriptor, valid descriptors are:<br>ORBIT, CLOCK, CODE_BIAS, PHASE_BIAS, or VTEC</li>
    13951396<li>Year, GPS time</li>
    … …  
    14201421<li>Number of following records in this block</li>
    14211422<li>Mountpoint, source/stream indicator</li>
    1422 </ul>
     1423</ol>
    14231424Each of the following 'satellite records' in such a block carries information for one specific satellite. Undefined parameters in the 'satellite records' could be set to zero &quot;0.000&quot;.
    14241425
    … …  
    15281529The second record in this block provides the following consistency information:
    15291530<ul>
    1530 <li>Dispersive bias consistency indicator</li>
    1531 <li>MW consistency indicator</li>
     1531
     1532<li>Dispersive bias consistency indicatory<br>
     15330 &minus; phase biases valid for non-dispersive signal only<br>
     15341 &minus; phase biases maintain consistency between non-dispersive and all original dispersive phase signals
     1535</li>
     1536
     1537<li>MW consistency indicator<br>
     15380 &minus; code and phase biases are independently derived<br>
     15391 &minus; consistency between code and phase biases is maintained for the MW combinations
     1540</li>
     1541
    15321542</ul>
    15331543Following records provide satellite specific information:
    15341544<ul>
    15351545<li>GNSS Indicator and Satellite Vehicle Pseudo Random Number</li>
    1536 <li>Yaw angle [&deg;], restricted to be in [0&deg, 360&deg]</li>
     1546<li>Yaw angle [&deg;], restricted to [0&deg... 360&deg]</li>
    15371547<li>Yaw rate [&deg;/s]</li>
    15381548<li>Number of phase biases in this record, succeeded by phase specific information:</li>
    … …  
    20422052<p><a name="pppclient"><h4>3.13. PPP Client</h4></p>
    20432053<p>
    2044 BNC can derive coordinates for a rover position following the Precise Point Positioning (PPP) approach. It uses either code or code plus phase data in ionosphere free linear combinations P3 or L3. Besides pulling a stream of observations from a dual frequency receiver, this also
     2054BNC can derive coordinates for a rover position following the Precise Point Positioning (PPP) approach. It uses either code or code plus phase data from one or more GNSS systems in ionosphere free linear combinations P3 or L3. Besides pulling a stream of observations from a dual frequency GNSS receiver, this also
    20452055<ul>
    20462056<li>requires pulling in addition a stream carrying satellite orbit and clock corrections to Broadcast Ephemeris in the form of RTCM Version 3 'State Space Representation' (SSR) messages. Note that for BNC these Broadcast Corrections need to be referred to the satellite's Antenna Phase Center (APC). Streams providing such messages are listed on <u>http://igs.bkg.bund.de/ntrip/orbits</u>. Stream 'CLK11' on NTRIP Broadcaster 'products.igs-ip.net:2101' is an example.</li>
    … …  
    20532063
    20542064<p><img src="IMG/screenshot03.png"/></p>
    2055 <p><u>Figure 20:</u> Precise Point Positioning with BNC, PPP Panel 1.</p>
     2065<p><u>Figure 20:</u> Real-time Precise Point Positioning with BNC, PPP Panel 1.</p>
    20562066
    20572067<p><img src="IMG/screenshot18.png"/></p>
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