Technical description of the quarterly solution opa2012a 1. Origin of input data: databases from IVS Data Center, version 4 or more. 2. Authentic processing steps after data retrieval: re-Calc, transform to superfile, and put into BATCH Solve. 3. Origin of meteorological data: use database content. 4. Use numerical weather model: ECMWF for computing VMF1. 5. Setting of mapping functions: VMF1. 6. Origin of cable cal data: use database content. 7. Application of cable cal flags: use database settings. 8. Selection/settings of geophysical models: replace database settings. 8.1. Nutation/precession: IAU 2000A nutation and IAU 2006 precession. 8.2. Short-period tidal variations in x, y, UT1: IERS 2003. 8.3. Troposphere mapping functions: VMF1. 8.4. A priori mean gradients: from VLBI data or DAO weather model. 8.5. Solid Earth tide: IERS Conventions 1996, pp. 56--65, step 1 and step 2, anelasticity variant, including tides of the 3-rd order. 8.6. Ocean loading displacements: FES 2004. 8.7. Atmospheric loading displacements: APLO (Petrov & Boy 2004). 8.8. Permanent tide correction: applied. 8.9. Thermal expansion: Nothnagel (2008). 8.10. A priori station positions and velocities: VTRF 2008a or blokq.dat file content or database content for new stations. 8.11. A priori source coordinates: ICRF2 or database content for new sources. 9. Parameterization 9.1. Clock: quadratic + continuous piece-wise linear with 60-mn interval. 9.2. Atmosphere: continuous piece-wise linear 20-mn interval. 9.3. Gradients: estimated at 6-hr interval at all sites. 9.4. Earth orientation: polar motion and rate, UT1 and rate, nutation offsets. 9.5. Station positions: all global. Estimated at epoch 2000.01.01. Splines were used to model the non-linear motion of the following sites: STATION GILCREEK DEGREE 2 NODE 1984.07.01 NODE 1990.01.01 NODE 1997.01.01 NODE 2001.06.01 NODE 2002.11.03_22:12:42 NODE 2003.02.01 NODE 2004.03.01 NODE 2005.12.30 STATION HRAS_085 DEGREE 3 NODE 1980.04.11 NODE 1983.01.01 NODE 1984.01.01 NODE 1984.07.01 NODE 1985.03.01 NODE 1985.05.15 NODE 1985.07.15 NODE 1986.01.01 NODE 1986.07.01 NODE 1987.01.01 NODE 1987.07.01 NODE 1988.01.01 NODE 1988.07.01 NODE 1989.01.01 NODE 1991.06.06 STATION PIETOWN DEGREE 2 NODE 1988.09.08 NODE 1993.03.01 NODE 1996.01.01 NODE 1998.01.01 NODE 2000.01.01 NODE 2002.01.01 NODE 2004.01.01 NODE 2007.09.01 STATION TIGOCONC DEGREE 2 NODE 2002.05.12 NODE 2010.02.27_06:34 NODE 2012.01.31 STATION TSUKUB32 DEGREE 1 \ NODE 1998.06.25 NODE 2011.03.11_05:46 NODE 2012.01.31 The data relevant to the following stations were removed: (Used for polarization tests) NOTOX WIDE85_3 VLBA85_3 MOJAVLBA LEFT85_1 9.6. Station velocities: all estimated as global parameters, except: WARK12M YARRA12M KATH12M KUNMING UCHINOUR for which velocities are not estimated. 9.7. Source coordinates: all global except sources showing strong non linear displacements: 0014+813 0235+164 0637-752 0738+313 1308+326 1448+762 2145+067 3C120 \ 1610-771 0208-512 0438-436 0451-282 0919-260 0607-157 2243-123 NGC1052 \ 2128-123 3C279 0106+013 2134+00 1021-006 3C273B 0528+134 2121+053 \ 0202+149 3C454.3 1611+343 OQ208 2201+315 2234+282 OK290 4C39.25 \ 3C345 0711+356 3C84 1739+522 1044+719 0212+735 3C309.1 The data relevant to the following sources were removed: (Regular sources having zero good observations in a preliminary solution) 2357+811 0001-121 0002-350 0002+813 0005+841 0006+771 0007+757 0007+332 \ 0007+205 0008-311 0008+320 0008+006 0009+854 0010+775 0012-357 0012+776 \ 0013-240 0013+323 0013+790 0015+781 0016-223 0017+296 0016+803 UG00192 \ 0019-339 0023-354 0025+797 0026+845 0027+587 0030+765 0031+799 0032-011 \ 0032+801 0033+845 0036+748 0036+767 0037+011 0037+809 0039+211 0040+517 \ 0026+892 0042+456 0042-373 0042+754 0042+750 0045-255 NGC0253 0046+839 \ 0053-160 0053-130 0052+781 0055-340 0056-187 0056-135 0055+796 0057+101 \ 0058+058 0101-126 0101+113 0104+650 0106-391 0105+785 0100+873 0108-146 \ 0115+832 0118+111 0118+806 0118+841 0123-015 0125-176 0124+845 0131-450 \ 0131-367 0133+758 0137-273 0138-381 0147+755 0153-149 0152+756 0155+810 \ 0156+795 0201-440 0159+831 0159+839 0201+796 UGC01651 0207+507 0212-214 \ 0215-261 0211+795 0213+798 0215+806 0210+860 0210+86A 0210+861 0219+628 \ 0219+767 0223+774 0223+814 0228+626 0227+782 0231+620 0233+434 M77 \ 0244+790 0249+171 0250-122 0247+789 0251+795 0253+789 0258-163 NGC1167 \ 0258+356 0255+785 0259+602 0303-245 0259+793 0258+818 0301+756 0304-122 \ 0305-131 0301+773 0303+697 0309+049 0316+308 0319-133 0324-379 UXARI \ 0324+763 0328-060 0328+677 0332-070 0336+539 0340-330 0340+044 0328+861 \ 0339+651 0341+729 0343+799 0349+764 0354+000 0351+784 0356+102 0354+762 \ 0356+761 0357+816 0400+764 0407+760 0402+842 0409+806 0413+758 0415+530 \ 0420-625 0415+763 0419+083 0406+856 0414+792 0417+767 0422-278 0424+128 \ 0425+116 0422+770 0407+869 0426+351 0428-252 0427-055 0432-253 0432+510 \ 0434-225 0432+507 0434-240 0428+807 0436+503 0434+759 0439-299 0438+503 \ 0441+513 0437+785 0443+801 0445+763 0451-398 0448+763 0445+830 0456-317 \ 0452+761 0457+267 0500+640 0459+791 0506-196 0506-332 0510-005 0512-129 \ 0515-674 0512+249 0510+767 0517-027 0507+839 0502+859 0522-314 0517+764 \ 0521+077 0522-030 0457+875 0518+761 0521+632 0525-230 0525-100 0525-127 \ 0505+874 0528+576 0532-398 0532+196 0533-396 0537-692 0535+001 0535+331 \ 0536+198 0537-052 0534+753 0538+330 0540-380 0533+812 0541-007 0539+752 \ 0541+759 0547-253 0548-090 NGC2110 0552+393 0554-026 0554+179 0548+800 \ 0558-504 0559-276 0559-200 0600-000 0602-317 0555+801 0605-247 0605-063 \ 0606-025 0609-295 0608+042 0611+139 0612+123 0613-312 MRK003 0613+075 \ 0610+783 0615-142 NGC2146 0612+755 0555+873 0624-151 0618+796 0626+155 \ 0615+848 0623+765 0623+76A 0621+814 0629+104 0632-278 0628+796 0635+250 \ 0624+842 0636-087 0637-128 0632+782 0633+805 0639+244 0641-010 0635+803 \ 0642+083 0637+780 0638+779 0636+823 0643+548 0646-398 0640+779 0648+027 \ 0648+769 0655+132 0656-366 0644+861 0642+866 0701+119 0705-002 0705+025 \ 0706-042 0707-299 0708-139 0712-037 0704+819 0714+101 0710+767 0712+753 \ 0719-271 0714+779 0701+872 0710+858 0716+824 0730-034 0729+562 0727+770 \ 0737-242 0734+805 0734+80A 0741-182 0743+558 0736+837 0745+579 0748-378 \ 0748+582 0750-395 0750+535 0752-385 0749+718 0753+613 0753+772 0800-380 \ 0755+764 0803-047 0800+760 0757+815 0800+789 0805+072 0747+871 0805+538 \ 0808-132 0809+483 0807+764 0810+646 0812+757 0804+863 0817+472 0819+770 \ 0824+110 0824+509 0818+845 0828-064 0829+140 0824+802 0831+146 0832-093 \ 0832-225 0824+840 0833-168 0836-384 0825+849 0838-090 4C+32.26 0844-391 \ 0841+786 0845+788 0848+686 0851-398 0849+675 0851+580 0855+133 0855+127 \ 0853+752 0854+783 0859-062 0902+343 0903-392 0903+669 0906-315 0858+839 \ 0907-091 0906+480 0912-204 0913-302 0910+805 0914-160 0910+814 0916-219 \ 0913+776 0905+866 0914+768 0916+814 0924+178 0924+732 0927+011 0929-289 \ 0926+793 0931+103 0935+181 0932+784 0931+834 0938-066 0940-118 0941-027 \ 0936+831 0939+797 0946+006 0946-096 0947-138 0947-006 0948-285 0946+808 \ M82 0951+699 0950+794 0954-064 0955-283 0956-266 0956-256 0956+015 \ 0953+816 NGC3079 0958+793 1000+779 1003+174 1001+817 1005-162 1003+813 \ 1007-383 1005+770 1007+657 1003+861 1004+861 1013-196 0959+881 1011+813 \ 1015-214 1016-268 1017+109 1016+771 1020-045 1020-114 1018+808 1020+820 \ 1026-179 1024+791 1026+790 1028+564 1031-253 1030+687 1031-019 1033+768 \ 1038+760 1043-290 1045+155 1046-026 1044+816 1047+097 1047+794 1046+835 \ 1052-376 1031+892 1055+285 1058+793 1100+837 1103-267 1104-121 1107+036 \ 1109+353 1110-374 1109+838 1110+771 1112-365 1112+772 1112+838 1115+810 \ 1117+543 1118+000 1121-200 1120+510 1120+777 1121+661 1123-356 1125-110 \ NGC3690 1130+008 1130+787 1135+836 1137+123 1142+134 1142+422 1143+052 \ 1144+840 1145+787 1146+770 1150+832 1151+598 1152+758 1152-295 1152+822 \ 1153+828 1153+733 1154+757 1200+858 1201+843 1201+823 1202+841 1202+527 \ 1205+782 1208+646 NGC4151 1208-269 1210+759 1212+177 1213+097 1216+798 \ M106 1216+640 1218+797 1217-266 1224+864 1225-023 1228-008 1230-183 \ 1231+507 1232+778 1232+777 NGC4552 1236+842 1235+767 1235-197 1242+864 \ 1239+328 1239-044 1241+802 1248+881 1243+764 1245+716 1248+762 1248-343 \ 1251+413 1254+226 1254+077 1257+839 1256+546 1256+009 1259+811 1305+825 \ 1305+822 1305+805 1310+860 1306+660 1305-241 1306-039 1310+784 1309+070 \ 1314+677 1317+825 1315+047 1316+109 1317-271 1320-140 1322+784 1324+758 \ 1328+826 3C287 1328+130 1338+870 1330+075 1331-109 1331+512 1333+034 \ 1337+808 1337+80A 1337+794 1341+144 1344+793 1346-168 1350+761 1352+636 \ 1354+487 1357+799 1358+791 1401+835 1406+863 1400+064 1409+625 1408+008 \ 1409+595 1415+793 1418+812 1423+857 1415+172 1418+784 1419+762 1421+754 \ 1419+104 1422+763 1419-229 1420-006 1421-490 1422+268 1422+364 1427+799 \ 1425+034 NGC5635 1426+212 1427+634 1427+000 1430+011 1438+802 1434+053 \ 1434-295 1435+019 1436-070 1438-390 1440-285 1443+773 1445+752 1447+771 \ 1447+536 1455+804 1456-179 1500+755 HD132742 1511+863 1511+859 1501+043 \ 1506+805 1503+604 1506+591 1509+756 1509-282 1516+819 1513-381 1514+055 \ 1514-261 1519+567 1517-385 1524+769 1520-330 1520-334 1525+737 1525+613 \ 1529+790 1532+824 1526+384 1535+830 1532+789 1532+772 1528-274 1529-195 \ 1529-373 1531-379 1533+418 1533-220 1540+784 1537-207 1540+539 1544+398 \ 1545+497 1545+210 1550+789 1549-242 1555+754 1556+797 1555+455 1601+784 \ 1624+879 1605+804 1603+699 1607+770 1603-193 1612+821 1609+745 1613+782 \ 1614+793 1610-277 SIGCRB 1619+765 1616-029 1631+859 1620-259 1621+013 \ 1620-260 1629+822 1628+813 1622+238 1626+755 1623-243 1626+518 1630+772 \ 1626-203 1628+003 1630+163 1632-188 1709+881 1640-039 1646+758 1643+007 \ 1650+758 1650+581 1654+785 NGC6240 1656+765 1657+780 1653-401 1701+795 \ 1658-217 1703+769 1701-246 1711+833 1708+771 1708+77A 1711+801 1706-223 \ 1709-342 1710-214 1716+762 1713+218 1712-120 1717+490 1717-229 1724+756 \ 1720-202 1721+024 1721-251 1724-198 1726-237 1733+798 1733+788 1728-260 \ 1729-191 1735+780 1733-197 1733-339 1735+026 1747+847 1735-267 1741+759 \ 1736-286 1738-336 1747+800 SGR-A 1742-283 1745+643 1745+030 1744-299 \ 1745-235 1746-347 1746-292 1756+818 1748-198 1749-286 1750-282 1752-217 \ 1753-281 1759+756 1758+666 1755-062 1800+751 1757-150 1756-663 1801+095 \ 1809+823 1800-302 1804-091 1805+054 1805-214 1810+750 1808-206 1809+068 \ 1809-315 1809-131 1810-321 1813+207 1813-241 1815+034 1817+512 1816+186 \ 1816-206 1825+799 1827+808 1828+821 1820-285 1826+764 1830+797 1824-141 \ 1826+083 1825-307 1832+779 1827-360 1834+789 1840+842 1833+752 1847+851 \ 1834-333 1834-090 1834-155 1834-219 1836+171 1835-186 1837-271 1843+767 \ 1840-079 1841+021 1841+128 1847+768 1850+817 1846+214 1851+752 1848+333 \ 1849-246 1906+860 1902+845 1900+777 1900+771 1856-094 1857-014 1858-212 \ 1915+863 1858-143 1859-050 1859-021 1915+855 1906+764 1906+767 1903+097 \ 1911+809 1911+80A 1915+803 NAQL93 1910-365 1911-397 1915-247 1918+019 \ 1924+792 1925+778 1920+014 1921+14B 1924+420 1928+681 1929+596 1930-028 \ 1937+798 1934+207 1938+751 1937+630 1938+666 1941+775 1937+172 1938-296 \ 1950+849 1950+84A 1946+788 1945+764 1946+785 1946+781 1946+751 1950+828 \ 1951+767 1947-284 1948-186 1948-241 1949-013 1951+498 1950-270 1954+617 \ 1954+405 1954+188 2004+841 2000+770 1957+404 2005+820 1958-258 2000+339 \ 1959-273 2005+781 2005+762 2003+104 2009+795 2008+205 2008-068 2036+880 \ 2015+766 2014+463 2015-211 2015-402 2016+406 2015-274 2023+783 2019-221 \ 2029+837 2021+414 2022+411 2030+839 2023+420 2027+383 2027-252 2028-204 \ 2029-215 2030+268 NGC6946 2033+466 2035+467 2035+159 2036-109 2036-201 \ 2037+411 2040+760 2038-274 2042+750 2043+74A 2054+864 2042-191 2043+440 \ 2044+462 2044-120 2046+413 2051+752 2048+370 2049+129 2051+687 2057+750 \ 2058+422 2102+766 2102+496 2101-097 2104+763 2101-715 2105+598 2105+420 \ 2109+776 2111+801 2107+521 2107+500 2113+827 2113+771 2110-160 2112+463 \ 2114+022 2115+056 2118+74A 2116-238 2120+767 2117-250 2117+025 2118-266 \ 2120+519 2120-108 2120-055 2123-071 2134+846 2128+681 2133+837 2133+792 \ 2133+760 2132+406 2133+469 2136+764 2134-470 2148+867 2142+834 2139+748 \ 2140-260 2145+815 2146+753 2143-236 2145+262 2144-065 2149+754 2147-186 \ 2154+577 2154-184 2154-080 2157+765 2158+771 2157-200 2159+753 2202-065 \ 2206+178 2206-237 2212+836 2209-255 2217+787 2217+558 2220+585 2219-340 \ 2222+762 2220-163 2227+752 2226-411 2227-210 2228-367 2228-319 2231+803 \ 2230+625 2233+340 2235+765 2245+879 2238+815 2239+815 2239+296 2240-064 \ 2249+856 2247+770 2248+757 2247+140 2249+760 2250+799 2249+402 2250-281 \ 2250+008 2251-419 2300+796 2300-151 2303+083 2309-133 2309+159 2310-417 \ 2313+020 2314+038 2314-116 2316+756 2317-372 2318-195 2324+779 2325+822 \ 2326+760 2328+812 2328-159 2330+777 2332+861 2332-531 2340-141 2343-075 \ 2346+750 2347+789 2350+302 2350-375 2351+805 2352+796 2353+796 2355+814 \ (Radio stars) 0236+610 0459-753 1612+339 0334+004 0323+285 1458-083 \ (Known gravitational lenses) 0218+35A 0218+35B 0218+357 1422+231 1830-21A 1830-21B 1830-211 9.8. Antenna axis offsets: estimated for the following sites: AIRA ALGOPARK BADARY BR-VLBA CHICHI10 CRIMEA CTVASTJ DSS13 \ DSS15 DSS45 DSS65 EFLSBERG FD-VLBA FORTLEZA GGAO7108 GIFU11 \ GILCREEK HARTRAO HATCREEK HAYSTACK HN-VLBA HOBART12 HOBART26 HRAS 085 \ JPL MV1 KASHIM11 KASHIM34 KASHIMA KATH12M KAUAI KOKEE KP-VLBA \ KWAJAL26 LA-VLBA MARPOINT MATERA MEDICINA METSAHOV MIAMI20 MK-VLBA \ MOJAVE12 MON PEAK NL-VLBA NOTO NRAO20 NRAO85 3 NYALES20 OHIGGINS \ ONSALA60 OV-VLBA OVRO 130 PARKES PENTICTN PIETOWN PINFLATS PLATTVIL \ PRESIDIO QUINCY RICHMOND SANTIA12 SC-VLBA SESHAN25 SINTOTU3 SVETLOE \ SYOWA TIGOCONC TIGOWTZL TSUKUB32 URUMQI VERAISGK VERAMZSW VNDNBERG \ WESTFORD WETTZELL YARRA12M YEBES YEBES40M YLOW7296 YUMA ZELENCHK 10. Outlier elimination: use database settings. 11. Constraints (only of interest for direct EOP estimates) 11.1. Sources: loose no-net rotation is uniformly applied to the 295 ICRF2 defining sources: 0002-478 0007+106 0008-264 0010+405 0013-005 0016+731 0019+058 0035+413 \ 0048-097 0048-427 0059+581 0104-408 0107-610 0109+224 0110+495 0116-219 \ 0119+115 0131-522 0133+476 0134+311 0138-097 0151+474 0159+723 0202+319 \ 0215+015 0221+067 0230-790 0229+131 0234-301 0235-618 0234+285 0237-027 \ 0300+470 0302-623 0302+625 0306+102 0308-611 0307+380 0309+411 0322+222 \ 0332-403 0334-546 0342+147 0346-279 0358+210 0402-362 0403-132 0405-385 \ 0414-189 0420-014 0422+004 0426+273 0430+289 0437-454 0440+345 0446+112 \ 0454-810 0454-234 0458-020 0458+138 0506-612 0454+844 0506+101 0507+179 \ 0516-621 0515+208 0522-611 0524-460 0524-485 0524+034 0529+483 0534-611 \ 0534-340 0537-441 0536+145 0537-286 0544+273 0549-575 0552+398 0556+238 \ 0600+177 0642+449 0646-306 0648-165 0656+082 0657+172 0707+476 0716+714 \ 0722+145 0718+792 0727-115 0736+017 0738+491 0743-006 0743+259 0745+241 \ 0748+126 0759+183 0800+618 0805+046 0804+499 0805+410 0808+019 0812+367 \ 0814+425 0823+033 0827+243 0834-201 0851+202 0854-108 0912+029 0920-397 \ 0920+390 0925-203 0949+354 0955+326 0955+476 0954+658 1004-500 1012+232 \ 1013+054 1014+615 1015+359 1022-665 1022+194 1030+415 1030+074 1034-374 \ 1034-293 1038+528 1039+811 1042+071 1045-188 1049+215 1053+815 1055+018 \ 1101-536 1101+384 1111+149 1123+264 1124-186 1128+385 1130+009 1133-032 \ 1143-696 1144+402 1144-379 1145-071 1147+245 1149-084 1156-663 1156+295 \ 1213-172 1215+303 1219+044 1221+809 1226+373 1236+077 1240+381 1243-072 \ 1244-255 1252+119 1251-713 1300+580 1308+328 1313-333 1324+224 1325-558 \ 1334-127 1342+662 1342+663 1349-439 1351-018 1354-152 1357+769 1406-076 \ 1417+385 1418+546 1420-679 1423+146 1424-418 1432+200 1443-162 1448-648 \ 1451-400 1456+044 1459+480 1502+106 1502+036 1504+377 1508+572 1510-089 \ 1511-100 1514+197 1520+437 1519-273 1546+027 1548+056 1555+001 1554-643 \ 1557+032 1604-333 1606+106 1611-710 1614+051 1617+229 1619-680 1622-253 \ 1624-617 1637+574 1638+398 1639+230 1642+690 1633-810 1657-261 1657-562 \ 1659-621 1705+018 1706-174 1717+178 1726+455 1730-130 1725-795 1732+389 \ 1738+499 1738+476 1741-038 1743+173 1745+624 1749+096 1751+288 1754+155 \ 1758+388 1803+784 1800+440 1758-651 1806-458 1815-553 1823+689 1823+568 \ 1824-582 1831-711 1842+681 1846+322 1849+670 1908-201 1920-211 1921-293 \ 1925-610 1929+226 1933-400 1936-155 1935-692 1954+513 1954-388 1958-179 \ 2000+472 2002-375 2008-159 2029+121 2052-474 2059+034 2106+143 2106-413 \ 2113+293 2123-463 2126-158 2131-021 2136+141 2142-758 2150+173 2204-540 \ 2209+236 2220-351 2223-052 2227-088 2229+695 2232-488 2236-572 2244-372 \ 2245-328 2250+190 2254+074 2255-282 2300-683 2318+049 2326-477 2333-415 \ 2344-514 2351-154 2353-686 2355-534 2355-106 2356+385 2357-318 11.2. Stations: loose no-net rotation/translation on positions and velocities applied to a sub-network: ALGOPARK BR-VLBA CRIMEA DSS45 FD-VLBA FORTLEZA HARTRAO HN-VLBA \ HOBART26 KOKEE KP-VLBA LA-VLBA MATERA MK-VLBA NL-VLBA NOTO \ NYALES20 ONSALA60 OV-VLBA SC-VLBA SESHAN25 SVETLOE WESTFORD WETTZELL 11.3. Stations with discontinuous positions and date of discontinuity: YAKATAGA 871201 * Earthquake SOURDOGH 871201 * Earthquake WHTHORSE 871201 * Earthquake FORTORDS 891001 * Earthquake PRESIDIO 891001 * Earthquake MOJAVE12 920627 * Earthquake DSS15 920627 * Earthquake MEDICINA 960601 * Rail repair EFLSBERG 961001 * Rail repair DSS65 970415 * Rail repair MIURA 000601 * Earthquake TATEYAMA 000601 * Earthquake GGAO7108 030101 * Station relocation SINTOTU3 030915 * h/z KASHIMA 110311 * Earthquake KASHIM11 110311 * Earthquake KASHIM34 110311 * Earthquake 12. Generation of pre-reduced datum-free normal equations: will be done later in the SINEX (rapid) solution processed in independent mode. 13. Further details 13.1. Data type: group delays. 13.2. Data editing: 5 degree elevation cutoff. 13.3. Data weighting: weights are defined as follows: 1/sqrt ( f**2 + a**2 ) where "f" is the formal uncertainty of the ionosphere free linear combination of group delays at X- and S-band obtained by fringe fitting on the base of achieved signal to noise ratio. Station-dependent parameter "a" was computed for each session by an iterative procedure such that the ratio of the sum of squares of the weighted residuals to the estimate of their mathematical expectation is about unity. 13.4. Standard errors reported: all errors are derived from least-squares estimation propagated from the data weights and the constraints applied to the troposphere, clock and EOP parameters. 13.5. Software: CALC 10.0, SOLVE revision date 2010.05.21. 13.6. Other informations about the solution are reported at http://ivsopar.obspm.fr.