[IGSREPORT-8258] Wk 1112 EMR Analysis Report
Pierre Tetreault
pierre at geod.nrcan.gc.ca
Fri May 11 08:52:41 PDT 2001
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IGS Electronic Report 11 May 08:52:46 PDT 2001 Message Number 8258
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Author: NRCan/GSDivision
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EMR ANALYSIS REPORT GPS-WEEK 1112 Dates: 01apr29 to 01may05
********************************************************************************
NRCan (Natural Resources Canada, formerly Energy, Mines and Resources (EMR))
615 Booth Street, Ottawa, Canada K1A 0E9
e-mail: pierre at geod.nrcan.gc.ca, huot at geod.nrcan.gc.ca
tel: (613)992-2218 (Pierre Tetreault)
(613)996-4914 (Caroline Huot)
fax: (613)995-3215
PRODUCTS GENERATED:
The following products are generated and uploaded into CDDIS @ NASA/GSFC
EMR11120-6.SP3 GPS ephem. files for days 0-6, week #1112 in sp3 format
EMR11127.ERP pole x,y and DUT1 solutions for week #1112
EMR11127.SNX station and EOP weekly combined solution in SINEX format
EMR11127.SUM name of this text summary file
REMARKS on EMR products:
1. ALGO receiver clock used as reference time. In the sp3 EPH file sat. clock
correction value of 999999.999999 microseconds indicates that the direct clock
comparison with the reference clock is not available (e.g. ALGO not observing
a satellite).
ALGO clock error & drift were about 439.6 ns (52028) & 9.8 ns/day w.r.t.
GPS time.
DRAO clock error & drift were about -1197.6 ns (52031) & 29.2 ns/day w.r.t.
GPS time.
2. Date | PRN | Action | Period | Reason
+--------+-------+--------+----------------+----------------------------+
01apr29 | 02 | E | 00:00 to 23:45 | Modeling Problems
01may04 | 21 | R | 20:00 to 23:45 | Modeling Problems
| 19 | R | 00:00 to 04:00 | Modeling Problems
01may05 | 23 | E | 00:00 to 23:45 | Modeling Problems
+--------+-------+--------+----------------+----------------------------+
(R) Satellite was removed from EMR SP3 file.
(E) Satellite was excluded prior to processing data.
(M) Satellite in maneuver.
SOLUTION CHARACTERISTICS
1. Solution identifier: Submission 010510
2. Software used : GIPSY/OASIS II (UNIX )
3. Definition of Terrestrial frame:
origin and orientation : Nominally IGS97
reference epoch : current date
GM : 398600.4415 km^3/s^2
gravity model : GEMT3( 8,8) +C21+S21
ocean loading : Pagiatakis, global_model
4. Solution characteristics:
undifferenced phase and smoothed pseudorange data for satellite
elevation > 15 degrees at 7.5 min. normal point interval; single
day (24h) arc with 6 IC and 3 rad. parameters per satellite
5. See IGS Mail#928 (April 05, 1995) and IGS Report#1488 (January 16, 1995)
for more details regarding EMR processing strategy.
CARRIER PHASE / PSEUDO RANGE STATISTICS
Note: F indicates a constrained fiducial site
E indicates an eclipsing satellite
Carrier Phase Statistics
rms (cm) / # obs
01apr29 01apr30 01may01 01may02 01may03 01may04 01may05
---------------------------------------------------------------------
ALGO .39/1555 .42/1602 .45/1604 .56/1331 .55/ 831 .50/1614 .42/1523
AREQ .53/1474 .00/ 0 .00/ 0 .00/ 0 .00/ 0 .00/ 0 .00/ 0
ARTU .47/1505 .47/1460 .00/ 0 .00/ 0 .00/ 0 .00/ 0 .00/ 0
AUCK .00/ 0 .59/1355 .57/1469 .55/1461 .50/1448 .00/ 0 .51/1416
BAHR .00/ 0 .49/1476 .44/1164 .58/1628 .59/1644 .00/ 0 .00/ 0
BILI .52/1309 .55/1656 .55/1660 .00/ 0 .00/ 0 .57/1498 .58/1534
BRMU .48/1423 .52/1402 .44/1347 .45/1456 .49/1467 .48/1481 .46/1380
CHAT .00/ 0 .00/ 0 .00/ 0 .00/ 0 .00/ 0 .51/ 859 .00/ 0
COCO .00/ 0 .00/ 0 .48/1635 .59/1748 .51/1544 .46/1589 .45/1515
CORD .00/ 0 .49/ 932 .39/ 918 .00/ 0 .00/ 0 .47/ 914 .42/ 765
DAV1 .44/1518 .40/1592 .43/1649 .43/1562 .38/1353 .34/ 926 .42/1580
DRAO .48/1441 .61/1686 .58/1606 .50/1704 .46/1693 .51/1704 .57/1607
EISL .72/ 892 .54/ 965 .59/ 876 .57/1037 .55/1176 .53/1029 .54/1031
FAIR .44/1390 .73/1428 .70/1328 .55/1432 .53/1386 .50/1312 .50/1330
FORT .62/ 690 .70/ 726 .63/ 862 .65/ 896 .67/ 881 .71/ 846 .64/ 858
GUAM .00/ 0 .80/1583 .66/1377 .87/1613 .79/1588 .73/1280 .83/1501
GUAT .00/ 0 .64/1502 .66/1402 .68/1692 .71/1494 .93/1610 .70/1614
HOB2 .00/ 0 .00/ 0 .00/ 0 .00/ 0 .00/ 0 .47/1123 .00/ 0
IISC .56/ 806 .57/ 841 .56/ 985 .58/ 794 .00/ 0 .00/ 0 .00/ 0
IRKT .59/1448 .00/ 0 .48/1361 .53/1418 .53/1445 .45/1071 .48/1147
JAB1 .00/ 0 .00/ 0 .00/ 0 .00/ 0 .00/ 0 .00/ 0 .60/1378
KERG .56/1270 .51/1416 .52/1102 .63/1487 .59/1481 .62/1382 .55/1311
KOKB .53/1017 .60/1400 .58/1306 .59/1337 .65/1497 .65/1450 .63/1404
KUNM .55/ 808 .56/ 748 .61/ 959 .56/ 840 .56/ 949 .54/ 775 .56/1018
LPGS .63/1280 .00/ 0 .00/ 0 .00/ 0 .00/ 0 .00/ 0 .00/ 0
MAC1 .37/1392 .37/1309 .41/1365 .39/1589 .38/1551 .00/ 0 .40/1146
MAS1 .51/1401 .48/1499 .48/1404 .47/1563 .46/1518 .47/1468 .41/1507
MCM4 .51/ 620 .45/ 897 .48/ 683 .47/ 619 .44/ 590 .44/ 581 .48/ 775
NKLG .99/1425 .00/ 0 .92/1501 .88/1436 .00/ 0 .75/1395 .82/1336
NRC1 .35/1509 .39/1617 .35/1438 .49/1626 .46/1645 .46/1584 .41/1564
NRC2 .37/1424 .39/1625 .37/1452 .49/1633 .46/1649 .46/1587 .41/1564
NSSP .40/1157 .42/1190 .42/1181 .00/ 0 .00/ 0 .45/1067 .42/1051
NYAL .44/1690 .47/1969 .46/1873 .46/1848 .47/1788 .48/1843 .45/1771
OHIG .46/1296 .49/1286 .47/1331 .54/1405 .52/1485 .53/1521 .56/1482
ONSA .43/1547 .41/1627 .43/1481 .46/1648 .53/1647 .48/1524 .40/1507
PIE1 .46/1150 .44/1365 .43/1231 .43/1318 .44/1335 .42/1312 .42/1222
PIMO .00/ 0 .00/ 0 .00/ 0 .00/ 0 .00/ 0 .46/ 593 .00/ 0
POL2 .00/ 0 .00/ 0 .00/ 0 .00/ 0 .00/ 0 .44/1181 .39/1198
SEY1 .61/ 747 .59/ 488 .73/ 651 .67/ 963 .82/ 758 .84/ 807 .00/ 0
SFER .52/1356 .54/1492 .51/1419 .48/1571 .52/1395 .49/1514 .40/1275
STJO .43/1589 .40/1650 .54/1446 .45/1658 .47/1666 .58/1566 .41/1595
SUTH .49/1156 .44/1227 .58/1340 .50/1325 .45/1302 .50/1265 .43/1183
TIDB .48/1429 .53/1472 .57/1540 .50/1593 .52/1422 .00/ 0 .55/1183
TSKB .46/1404 .42/1097 .38/1020 .35/ 817 .35/ 922 .36/1007 .40/1068
USNO .50/1399 .49/1203 .53/1517 .63/1619 .61/1440 .00/ 0 .63/1430
YAR1 .38/1269 .34/ 959 .00/ 0 .00/ 0 .00/ 0 .42/ 994 .61/ 992
YELL .46/1608 .45/1639 .48/1588 .48/1673 .50/1635 .00/ 0 .44/1575
PRN01 .46/1681 .48/1797 .49/1831 .55/1656 .59/1463 .52/1492 .52/1875
PRN02 E .00/ 0 .55/1731 .55/1886 .56/1745 .53/1624 .52/1633 .50/1747
PRN03 .47/1789 .51/1700 .53/1651 .51/1648 .50/1602 .52/1665 .48/1809
PRN04 .53/1913 .50/1867 .48/1910 .53/1663 .49/1567 .46/1620 .52/1868
PRN05 E .54/1516 .52/1506 .52/1815 .58/1668 .51/1495 .51/1601 .50/1751
PRN06 .52/1769 .54/1735 .53/1804 .52/1634 .53/1569 .53/1661 .49/1893
PRN07 .57/1758 .49/1748 .52/1929 .62/1831 .56/1680 .52/1906 .57/1930
PRN08 .51/1839 .49/1726 .52/1773 .56/1653 .52/1504 .58/1600 .52/1799
PRN09 .51/1997 .49/1933 .55/2068 .53/1915 .50/1826 .50/1840 .48/2031
PRN10 E .53/1922 .48/1685 .49/1866 .56/1756 .53/1698 .51/1562 .54/1836
PRN11 .52/1785 .51/1845 .57/1925 .55/1850 .54/1691 .51/1778 .52/2016
PRN13 .53/1725 .49/1725 .51/1796 .57/1732 .50/1552 .54/1448 .52/1854
PRN14 .44/ 998 .48/1646 .50/2000 .51/1913 .51/1748 .58/1262 .50/1573
PRN17 .49/1877 .55/1932 .56/1962 .56/1881 .61/1749 .62/1803 .58/2115
PRN18 E .54/1956 .51/2059 .53/1610 .55/2025 .50/1918 .49/1682 .54/2004
PRN19 .43/1329 .42/1314 .43/1205 .50/1307 .43/1129 .46/ 855 .38/1124
PRN20 E .47/1706 .58/1733 .64/1841 .63/1666 .54/1557 .56/1577 .58/1912
PRN21 E .56/1823 .67/1830 .61/1777 .62/1822 .67/1723 .68/1716 .63/1936
PRN22 E .48/1653 .55/1697 .55/1739 .54/1764 .53/1636 .58/1574 .54/1880
PRN23 E .44/ 998 .50/1781 .48/ 589 .61/1992 .55/1866 .58/1516 .00/ 0
PRN24 .54/1801 .46/1749 .51/1846 .55/1761 .54/1604 .53/1731 .51/1856
PRN25 .45/1679 .52/1852 .56/1852 .52/1766 .50/1591 .52/1638 .50/1954
PRN26 .51/2123 .47/2074 .52/2190 .55/1960 .52/1882 .57/1934 .52/2111
PRN27 .52/1901 .47/1727 .48/1974 .52/1765 .55/1536 .53/1684 .49/1745
PRN28 E .51/1716 .51/1868 .60/1847 .55/1775 .55/1595 .55/1658 .50/1875
PRN29 .48/1754 .51/1788 .51/1892 .53/1918 .51/1738 .61/1561 .48/2015
PRN30 E .62/1605 .51/1524 .49/1659 .56/1525 .53/1414 .57/1507 .55/1833
PRN31 .49/1781 .50/1809 .57/1834 .54/1749 .56/1668 .51/1768 .50/1994
Pseudo Range Statistics
rms (cm) / # obs
01apr29 01apr30 01may01 01may02 01may03 01may04 01may05
---------------------------------------------------------------------
ALGO 32/1555 35/1602 37/1604 37/1331 29/ 831 31/1614 31/1523
AREQ 22/1474 0/ 0 0/ 0 0/ 0 0/ 0 0/ 0 0/ 0
ARTU 32/1505 32/1460 0/ 0 0/ 0 0/ 0 0/ 0 0/ 0
AUCK 0/ 0 52/1355 51/1470 49/1461 48/1448 0/ 0 48/1416
BAHR 0/ 0 30/1476 30/1164 46/1628 30/1644 0/ 0 0/ 0
BILI 36/1309 34/1656 35/1628 0/ 0 0/ 0 33/1498 33/1534
BRMU 37/1425 47/1402 50/1349 46/1457 45/1467 38/1481 46/1380
CHAT 0/ 0 0/ 0 0/ 0 0/ 0 0/ 0 68/ 859 0/ 0
COCO 0/ 0 0/ 0 23/1635 27/1748 28/1544 25/1589 26/1515
CORD 0/ 0 54/ 930 52/ 917 0/ 0 0/ 0 67/ 909 60/ 763
DAV1 27/1518 27/1592 26/1649 26/1562 26/1353 27/ 926 26/1580
DRAO 31/1441 35/1686 37/1606 37/1704 36/1693 33/1704 34/1607
EISL 75/ 893 67/ 965 76/ 876 75/1037 72/1176 67/1029 70/1031
FAIR 24/1392 23/1431 24/1329 25/1432 23/1386 24/1312 24/1330
FORT 80/ 690 84/ 726 86/ 862 84/ 896 85/ 871 0/ 0 0/ 0
GUAM 0/ 0 44/1584 46/1377 47/1615 41/1588 35/1280 37/1502
GUAT 0/ 0 0/ 0 0/ 0 82/1682 70/1492 0/ 0 0/ 0
HOB2 0/ 0 0/ 0 0/ 0 0/ 0 0/ 0 42/1123 0/ 0
IISC 71/ 806 73/ 841 74/ 985 69/ 794 0/ 0 0/ 0 0/ 0
IRKT 51/1448 0/ 0 61/1361 64/1419 61/1445 58/1071 60/1147
JAB1 0/ 0 0/ 0 0/ 0 0/ 0 0/ 0 0/ 0 35/1378
KERG 50/1270 55/1416 53/1102 53/1488 52/1481 52/1382 54/1311
KOKB 60/1017 71/1401 43/1307 107/1339 73/1497 46/1451 39/1405
KUNM 76/ 808 75/ 748 84/ 959 72/ 840 73/ 949 81/ 775 77/1018
LPGS 37/1280 0/ 0 0/ 0 0/ 0 0/ 0 0/ 0 0/ 0
MAC1 41/1390 37/1306 34/1364 46/1585 45/1549 0/ 0 36/1144
MAS1 34/1401 34/1499 35/1404 37/1563 35/1518 33/1469 34/1507
MCM4 40/ 620 50/ 897 48/ 683 46/ 619 44/ 590 67/ 581 51/ 775
NKLG 67/1429 0/ 0 67/1504 71/1438 0/ 0 68/1395 69/1336
NRC1 39/1509 35/1617 45/1437 44/1626 46/1645 38/1584 36/1564
NRC2 39/1424 36/1625 48/1452 47/1634 45/1649 41/1587 40/1564
NSSP 59/1157 60/1191 58/1182 0/ 0 0/ 0 63/1067 63/1051
NYAL 42/1690 47/1969 48/1873 46/1848 48/1789 46/1844 46/1771
OHIG 37/1297 36/1286 37/1331 80/1405 39/1485 40/1521 43/1482
ONSA 37/1547 36/1627 36/1481 39/1648 37/1647 35/1524 36/1507
PIE1 40/1150 50/1366 52/1231 60/1320 59/1335 66/1312 63/1227
PIMO 0/ 0 0/ 0 0/ 0 0/ 0 0/ 0 65/ 593 0/ 0
POL2 0/ 0 0/ 0 0/ 0 0/ 0 0/ 0 0/ 0 55/1198
SEY1 83/ 747 69/ 488 87/ 652 117/ 964 85/ 758 89/ 808 0/ 0
SFER 61/1356 66/1492 0/ 0 76/1571 65/1396 0/ 0 61/1275
STJO 27/1589 29/1650 34/1445 31/1657 32/1666 29/1566 28/1595
SUTH 60/1156 56/1228 59/1340 59/1325 59/1302 0/ 0 63/1183
TIDB 24/1429 24/1472 22/1540 24/1593 24/1422 0/ 0 25/1183
TSKB 50/1405 63/1098 60/1020 59/ 817 55/ 922 62/1007 62/1068
USNO 38/1399 39/1203 37/1517 38/1619 40/1440 0/ 0 40/1430
YAR1 0/ 0 58/ 959 0/ 0 0/ 0 0/ 0 83/ 994 64/ 992
YELL 35/1608 35/1639 37/1588 38/1673 37/1635 0/ 0 38/1575
PRN01 44/1588 45/1754 46/1746 57/1656 47/1463 46/1323 42/1806
PRN02 E 0/ 0 50/1678 50/1752 57/1746 52/1624 55/1356 52/1695
PRN03 38/1741 45/1654 46/1551 54/1647 47/1602 42/1482 43/1721
PRN04 49/1848 49/1821 50/1818 56/1663 49/1567 47/1373 45/1795
PRN05 E 47/1471 49/1462 53/1695 59/1670 51/1495 51/1391 50/1676
PRN06 44/1715 48/1686 46/1703 55/1635 49/1569 49/1393 49/1745
PRN07 47/1725 51/1684 51/1794 56/1832 46/1670 54/1616 52/1853
PRN08 46/1779 46/1683 47/1665 55/1653 51/1504 55/1385 46/1755
PRN09 44/1956 50/1861 44/1898 52/1915 49/1826 49/1539 46/1868
PRN10 E 43/1900 45/1642 47/1744 52/1756 51/1698 56/1294 50/1726
PRN11 46/1706 44/1794 50/1819 54/1850 43/1691 42/1545 43/1951
PRN13 52/1636 45/1685 48/1704 56/1733 55/1552 51/1295 46/1794
PRN14 43/ 998 46/1560 50/1852 61/1912 49/1747 45/1099 43/1462
PRN17 47/1832 47/1869 47/1789 57/1880 49/1748 55/1497 52/1937
PRN18 E 50/1917 47/1973 50/1609 57/2026 50/1918 52/1459 42/1829
PRN19 50/1256 52/1314 56/1205 57/1306 56/1129 55/ 795 48/1101
PRN20 E 49/1610 46/1691 49/1747 57/1666 48/1557 44/1409 46/1837
PRN21 E 41/1787 46/1767 46/1650 55/1823 47/1723 47/1454 41/1801
PRN22 E 47/1625 45/1661 47/1656 62/1761 55/1636 44/1375 45/1780
PRN23 E 37/ 998 43/1695 54/ 589 51/1993 46/1867 46/1221 0/ 0
PRN24 46/1774 49/1691 47/1719 58/1762 49/1604 53/1442 50/1757
PRN25 43/1620 49/1785 49/1745 67/1765 50/1591 51/1439 47/1880
PRN26 43/2090 47/2035 48/2036 51/1960 44/1882 49/1592 44/1985
PRN27 48/1836 45/1684 49/1872 54/1765 51/1536 54/1468 46/1701
PRN28 E 47/1695 46/1821 50/1758 52/1772 49/1594 52/1455 49/1823
PRN29 44/1743 48/1703 48/1753 57/1915 49/1738 44/1304 46/1914
PRN30 E 47/1559 45/1461 49/1608 60/1525 52/1414 55/1312 47/1754
PRN31 44/1729 41/1769 44/1747 49/1751 45/1668 47/1542 43/1921
Station Clock Offsets Solution for 0h UT
(microsecond / sigma in ns)
01apr29 01apr30 01may01 01may02 01may03 01may04 01may05 sig
------------------------------------------------------------------------
ALGO REF REF REF 1.6566 --- 1.6123 1.5886 .3
AREQ 73.0612 --- --- --- --- --- --- .3
ARTU -.5148* -.5359* --- --- --- --- --- .3
AUCK --- -.4451 -.4435 1.2013 1.1460 --- 1.1266 .3
BAHR --- 762.7896 762.7801 764.4306 764.3994 --- --- .3
BILI -.4966* -.5510* -.5561* --- --- 1.0619* 1.0166* .3
BRMU -.4816 -.4586 -.4840 1.2187 1.1477 1.1602 1.0803 .3
CHAT --- --- --- --- --- 1.1232 --- .4
COCO --- --- -.4676 1.1892 1.1569 1.1309 1.0522 .3
CORD --- -.4480 -.4473 --- --- 1.1461 1.1340* .4
DAV1 -.4429* -.4282* -.4675* 1.1970* 1.1703 1.1271* 1.0990 .5
DRAO 2.5819 2.6029 -1.6785 REF REF REF REF .3
EISL -.4999 -.5692 -.3642 1.1731 1.1419 1.1487 1.0618* .7
FAIR -.5041 -.5156 -.5259 1.1207 1.0891 1.0593 1.0306 .5
FORT -.8277 -.8222 -.8167 .8444 .8272 --- --- .4
GUAM --- -.5811 -.5916 1.0639 1.0312 .9959 .9792 .3
GUAT --- --- --- 542.8002 834.4291 --- --- .3
HOB2 --- --- --- --- --- -.1127 --- .9
IISC -.4485 -.4394 -.4684 1.1901 --- --- --- .6
IRKT -.4775 --- -.5206 1.1164 1.0753 1.0321 1.4267 .4
JAB1 --- --- --- --- --- --- 863.3304* .3
KERG 565.6545* 734.9227* 977.4466* 909.8654* 487.0367* 707.5021* 831.3719* .3
KOKB -.3189 -.3269 -.3338 1.3149 1.2880 1.2583* 1.2294 .4
KUNM -.4184 -.4760 -.1144 1.1757 1.1444 1.0962 1.0947 .6
LPGS -.9597 --- --- --- --- --- --- 1.0
MAC1 -.4359 -.4514 -.4677 1.1637 1.1312 --- 1.1066 .3
MAS1 58.8529 58.8559 58.8490 60.4960 60.4481 60.4135 60.3875 .3
MCM4 42.3140* -1.9385* 19.6770 4.1598 10.8937* 33.1738* 52.6394 1.9
NKLG 776.3763 --- 253.4601 997.3403 --- 470.0201* 220.1441 .8
NRC1 -.9744 -.9880 -1.0029 .6399 .6036 .5667 .5310 .3
NRC2 -1.0995 -1.1436 -1.1897 .4233 .3578 .2910 .2258 .3
NSSP -.4626 -.4779 -.4575 --- --- 1.1398 1.1270 .3
NYAL -.3731 -.3683 -.3613 1.3040 1.2896 1.2758 1.2628 .3
OHIG -.4517 -.4491 -.4804 1.1971 1.1781 1.1384 1.0934 .3
ONSA 323.1086 323.0390 322.9704 324.5593 324.4689 324.3786 324.2883 .3
PIE1 -.5061 -.5274 -.5479 1.1865 1.1446 1.0533 1.0112 .3
PIMO --- --- --- --- --- 1.1226 --- 1.3
POL2 --- --- --- --- --- --- 1.0965 .3
SEY1 -.5024 -.4759 -.4474 1.1887 1.1224 1.2181 --- .5
SFER 32.0919* 32.0803* --- 34.1233* 34.6943* --- 37.8295* .3
STJO -1.3203 -1.3561 -1.3844 .2528 .2141 .1635 .0884 .3
SUTH -.4561 -.4585 -.4613 1.1933 1.1474 --- 1.1120 .3
TIDB -.5644 -.5575 -.5628 194.7624 194.7057 --- 194.5904 .3
TSKB -1.5063 -1.5219 -1.5428 .0954 .0621 .0281 -.0181 .5
USNO -.2589 -.2697 -.2810 1.3656 1.3331 --- 1.2675 .3
YAR1 --- 1.6286 --- --- --- -.2207* 1.2714* .4
YELL -.2467 -.2443 -.2403 1.4211 1.4032 --- 1.3677 .3
Notes: * indicates epoch other than 0h UT
Sig are sigmas, in ns, averaged over 7 days
!!ms!! indicates offsets greater than 1 millisecond
global: ALGO AREQ ARTU AUCK BAHR BILI BRMU CHAT COCO CORD DAV1 DRAO EISL FAIR
global: FORT GUAM GUAT HOB2 IISC IRKT JAB1 KERG KOKB KUNM LPGS MAC1 MAS1 MCM4
global: NKLG NRC1 NRC2 NSSP NYAL OHIG ONSA PIE1 PIMO POL2 SEY1 SFER STJO SUTH
global: TIDB TSKB USNO YAR1 YELL
--
Geodetic Survey of Canada
Ottawa, Ontario, Canada
Internet: pierre at geod.nrcan.gc.ca
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