Changeset 6921 in ntrip
- Timestamp:
- Jun 19, 2015, 11:23:07 AM (9 years ago)
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- 1 edited
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trunk/BNC/src/bnchelp.html (modified) (6 diffs)
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trunk/BNC/src/bnchelp.html
r6918 r6921 1373 1373 1374 1374 <p> 1375 Saved files contain blocks of records in plain ASCII format. The first record in each block contains the following 10 parameters: 1376 </p> 1377 <p> 1375 Broadcast Corrections files contain blocks of records in plain ASCII format. Each block contains a 'leading (first) record' followd by a number of 'satellite records' (exception: block VTEC). 1376 </p> 1377 <p> 1378 <b>Example for the 'leading record' of each block</b> 1379 </p> 1380 1381 <p> 1382 The 'leading record' of each block contains 10 parameters. Example: 1383 </p> 1384 <pre> 1385 > ORBIT 2015 06 17 11 43 35.0 2 53 CLK93 1386 </pre> 1387 <p> 1388 Their meaning is as follows: 1389 </p> 1378 1390 <ul> 1379 1391 <li>SSR message type indicator:<br>ORBIT, CLOCK, CODE_BIAS, PHASE_BIAS, or VTEC</li> … … 1404 1416 </ul> 1405 1417 <li>Number of following satellites (records) in this block</li> 1406 <li>Mountpoint, s tream indicator</li>1418 <li>Mountpoint, source/stream indicator</li> 1407 1419 </ul> 1408 1420 Each 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 "0.000". 1421 1409 1422 <p> 1410 1423 <b>Example for block 'ORBIT' carrying orbit corrections</b> … … 1423 1436 R24 59 0.5935 2.0732 -0.6884 -0.0000 0.0004 0.0003 1424 1437 </pre> 1425 1426 1438 <p> 1427 1439 The 'satellite records' in this block provide the following information: … … 1439 1451 1440 1452 <p> 1441 TBC<br> 1442 In case of RTCM message types 1058 or 1064 (see Annex) the first five parameters in each record are followed by 1443 </p> 1444 <ul> 1445 <li>IOD set to zero "0"</li> 1453 <b>Example for block 'CLOCK' carrying clock corrections</b> 1454 </p> 1455 1456 <p> 1457 <pre> 1458 > CLOCK 2015 06 17 11 43 35.0 2 53 CLK93 1459 G01 9 0.5412 0.0000 0.0000 1460 G02 25 11.1811 0.0000 0.0000 1461 G03 79 45.0228 0.0000 0.0000 1462 ... 1463 G32 82 -1.5324 0.0000 0.0000 1464 R01 59 4.2194 0.0000 0.0000 1465 R02 59 2.0535 0.0000 0.0000 1466 R03 59 1.8130 0.0000 0.0000 1467 ... 1468 R24 59 2.7409 0.0000 0.0000 1469 </pre> 1470 The 'satellite records' in this block provide the following information: 1471 <ul> 1472 <li>GNSS Indicator and Satellite Vehicle Pseudo Random Number</li> 1473 <li>IOD referring to Broadcast Ephemeris set</li> 1446 1474 <li>C0 polynomial coefficient for Clock Correction to Broadcast Ephemeris [m]</li> 1447 1475 <li>C1 polynomial coefficient for Clock Correction to Broadcast Ephemeris [m/s]</li> 1448 1476 <li>C2 polynomial coefficient for Clock Correction to Broadcast Ephemeris [m/s**2]</li> 1449 1477 </ul> 1450 Example: 1478 1479 <p> 1480 <b>Example for block 'CODE_BIAS' carrying code biases</b> 1451 1481 </p> 1452 1482 <pre> 1483 > CODE_BIAS 2015 06 17 11 43 35.0 2 53 CLK93 1484 G01 5 1C -3.3100 1W -3.7500 2W -6.1900 2X -5.7800 5I -5.4200 1485 G02 5 1C 3.6000 1W 3.9300 2W 6.4800 2X 0.0000 5I 0.0000 1486 G03 5 1C -2.1600 1W -2.6500 2W -4.3600 2X -4.4800 5I -5.3400 1453 1487 ... 1454 1058 0 1538 211151.0 G18 1.846 0.000 0.000 1455 1058 0 1538 211151.0 G16 0.376 0.000 0.000 1456 1058 0 1538 211151.0 G22 2.727 0.000 0.000 1488 G32 5 1C -1.5800 1W -1.1000 2W -1.8200 2X 0.0000 5I 0.0000 1489 R01 4 1C -2.4900 1P -2.4900 2C -3.1500 2P -4.1200 1490 R02 4 1C 0.3900 1P 0.2100 2C 0.4000 2P 0.3400 1491 R03 4 1C 2.4800 1P 2.2800 2C 3.7800 2P 3.7700 1457 1492 ... 1458 1064 0 1538 211151.0 R08 8.956 0.000 0.000 1459 1064 0 1538 211151.0 R07 14.457 0.000 0.000 1460 1064 0 1538 211151.0 R23 6.436 0.000 0.000 1461 ... 1493 R24 4 1C 2.7000 1P 2.7800 2C 3.9800 2P 4.6000 1462 1494 </pre> 1463 </p> 1464 <p> 1465 In case of RTCM message types 1060 or 1066 (see Annex) the first five parameters in each record are followed by 1466 <p> 1467 <ul> 1468 <li>IOD referring to Broadcast Ephemeris set</li> 1469 <li>C0 polynomial coefficient for Clock Correction to Broadcast Ephemeris [m]</li> 1470 <li>Radial Component of Orbit Correction to Broadcast Ephemeris [m]</li> 1471 <li>Along-track Component of Orbit Correction to Broadcast Ephemeris [m]</li> 1472 <li>Cross-track Component of Orbit Correction to Broadcast Ephemeris [m]</li> 1473 <li>C1 polynomial coefficient for Clock Correction to Broadcast Ephemeris [m]</li> 1474 <li>Velocity of Radial Component of Orbit Correction to Broadcast Ephemeris [m/s]</li> 1475 <li>Velocity of Along-track Component of Orbit Correction to Broadcast Ephemeris [m/s]</li> 1476 <li>Velocity of Cross-track Component of Orbit Correction to Broadcast Ephemeris [m/s]</li> 1477 <li>C2 polynomial coefficient for Clock Correction to Broadcast Ephemeris [m]</li> 1478 </ul> 1479 Example: 1480 </p> 1481 <pre> 1482 ... 1483 1060 0 1538 211610.0 G30 82 2.533 0.635 -0.359 -0.598 0.000 0.000 0.000 0.000 0.000 1484 1060 0 1538 211610.0 G31 5 -4.218 -0.208 0.022 0.002 0.000 0.000 0.000 0.000 0.000 1485 1060 0 1538 211610.0 G32 28 -2.326 0.977 -0.576 0.142 0.000 0.000 0.000 0.000 0.000 1486 ... 1487 1066 0 1538 211610.0 R22 27 1.585 2.024 2.615 -2.080 0.000 0.000 0.000 0.000 0.000 1488 1066 0 1538 211610.0 R23 27 6.277 2.853 4.181 1.304 0.000 0.000 0.000 0.000 0.000 1489 1066 0 1538 211610.0 R24 27 0.846 1.805 13.095 6.102 0.000 0.000 0.000 0.000 0.000 1490 ... 1491 </pre> 1492 </p> 1493 <p> 1494 In case of RTCM message types 1059 or 1065 (see Annex) the first five parameters in each record are followed by 1495 <ul> 1495 The 'satellite records' in this block provide the following information: 1496 <ul> 1497 <li>GNSS Indicator and Satellite Vehicle Pseudo Random Number</li> 1496 1498 <li>Number of Code Biases</li> 1497 1499 <li>Indicator to specify the signal and tracking mode</li> … … 1501 1503 <li>etc.</li> 1502 1504 </ul> 1503 Example: 1505 1506 <p> 1507 <b>Example for block 'PHASE_BIAS' carrying phase biases</b> 1504 1508 </p> 1505 1509 <pre> 1510 > PHASE_BIAS 2015 06 17 11 43 35.0 2 31 CLK93 1511 0 1 1512 G01 245.39062500 0.00000000 3 1C 3.9518 1 2 6 2W 6.3177 1 2 6 5I 6.8059 1 2 6 1513 G02 250.31250000 0.00000000 3 1C -4.0900 1 2 5 2W -6.7044 1 2 5 5I 0.0000 1 2 5 1514 G03 281.95312500 0.00000000 3 1C 2.9327 1 2 4 2W 4.6382 1 2 4 5I 5.4120 1 2 4 1506 1515 ... 1507 1059 0 1538 211151.0 G18 2 0 -0.010 11 -0.750 1508 1059 0 1538 211151.0 G16 2 0 -0.040 11 -0.430 1509 1059 0 1538 211151.0 G22 2 0 -0.630 11 -2.400 1510 ... 1516 G32 290.39062500 0.00000000 3 1C 1.2520 1 2 5 2W 2.0554 1 2 5 5I 0.0000 1 2 5 1511 1517 </pre> 1518 The 'satellite records' in this block provide the following information: 1519 </p> 1520 <p> 1521 <b>Example for block 'VTEC' carrying ionospheric corrections</b> 1522 </p> 1523 <pre> 1524 > VTEC 2015 06 17 11 43 35.0 6 1 CLK93 1525 1 6 6 450000.0 1526 17.6800 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 1527 4.5200 8.8700 0.0000 0.0000 0.0000 0.0000 0.0000 1528 -4.6850 -0.3050 1.1700 0.0000 0.0000 0.0000 0.0000 1529 -2.2250 -1.3900 -1.0250 -0.1300 0.0000 0.0000 0.0000 1530 0.8750 -0.3800 0.2700 -0.1300 0.0400 0.0000 0.0000 1531 1.2150 0.9050 -1.0100 0.3700 -0.1450 -0.2450 0.0000 1532 -0.8200 0.4850 0.2300 -0.1750 0.3400 -0.0900 -0.0400 1533 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 1534 0.0000 -0.0700 0.0000 0.0000 0.0000 0.0000 0.0000 1535 0.0000 0.5800 -1.4150 0.0000 0.0000 0.0000 0.0000 1536 0.0000 -0.6200 -0.1500 0.2600 0.0000 0.0000 0.0000 1537 0.0000 0.0700 -0.0900 -0.0550 0.1700 0.0000 0.0000 1538 0.0000 0.5000 0.3050 -0.5700 -0.5250 -0.2750 0.0000 1539 0.0000 0.0850 -0.4700 0.0600 0.0700 0.1600 0.0400 1540 </pre> 1541 The records in this block provide the following information: 1542 </p> 1512 1543 1513 1544 <p><a name="corrdir"><h4>3.8.1 Directory, ASCII - optional</h4></p> … … 1564 1595 <p> 1565 1596 The source code for BNC comes with an example perl script 'test_tcpip_client.pl' that allows you to read BNC's Broadcast Corrections from the IP port. 1566 </p>1567 1568 <p><a name="corrwait"><h4>3.8.4 Wait for Full Corr Epoch - mandatory if 'Port' is set</h4></p>1569 <p>1570 When feeding a real-time GNSS network engine (see 'Feed Engine') waiting epoch by epoch for synchronized Broadcast Corrections, or when you 'Combine Corrections' BNC drops (only concerning IP port output) whatever is received later than 'Wait for full corr epoch' seconds. A value of 2 to 5 seconds could be an appropriate choice for that, depending on the latency of the incoming Broadcast Corrections stream and the delay acceptable by your application. A message such as "COCK1: Correction over aged by 5 sec" shows up in BNC's logfile if 'Wait for full corr epoch' is exceeded.1571 </p>1572 <p>1573 Specifying a value of '0' means that BNC immediately outputs all incoming Broadcast Ephemeris Corrections and does not drop any of them for latency reasons.1574 1597 </p> 1575 1598
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