Technical description of solution cgs2004a.trf 1 - Technique: VLBI 2 - Analysis Centre: Space Geodesy Center (CGS) - Matera, Italy 3 - Software used: CALC Version: 9.12 SOLVE release: 2002.10.04 SOLVE revision: 2002.10.11 4 - Data span: 19800411 - 20031030 5 - Celestial Reference Frame: a - Nature: extragalactic b - Definition of the orientation: no-net-rotation w.r.t. ICRF-Ext1 using 141 sources, from 212 defining sources of the ICRF-Ext1 (Appendix A). 6 - Terrestrial Reference Frame: a - Relativity scale: Solar System Barycenter (SSB) b - Velocity of light: 299792458 m/s c - Geogravitational constant: not applicable d - Permanent tidal correction: no e - Definition of the origin: No net translation condition w.r.t. ITRF2000 for 24 stations (Appendix B). f - Definition of the orientation: No net rotation condition w.r.t. ITRF2000 using the same stations as in 6.e. g - Reference epoch: 1997.0 h - Tectonic plate model: None (ITRF2000 used as apriori). i - Constraints for time evolution: No net velocity adjustment condition in translation and rotation w.r.t. ITRF2000 velocity field, for 21 stations (Appendix C). 7 - Earth orientation: a - A priori precession model: IERS 1996 b - A priori nutation model: IERS 1996 c - Short-period tidal variations in x, y, UT1: Model used according to: John Gipson, "VLBI determination of neglected tidal terms in high frequency Earth Orientation Variation", Journal of Geophysical Research, Vol. 101, No. B12, p. 28051-28064, Dec 10, 1996. 8 - Estimated Parameters: a - Celestial Frame: right ascension and declination as global parameters for 554 sources (Appendix D) and as local parameters for 17 sources (Appendix E). b - Terrestrial Frame: Coordinates and velocities for 41 stations as global parameters (Appendix F) and as local parameters for 66 stations (Appendix G). Discontinuous positions are estimated for the following stations. site epoch DSS65 970415 EFLSBERG 961001 GILCREEK 021103 MEDICINA 960601 MOJAVE12 920627 c - Earth Orientation: Unconstrained X pole, Y pole, UT1, Xp rate, Yp rate, UT1 rate, dpsi and deps. X pole, Y pole, UT1 a-priori from EOPC04. d - Others: - station clocks: second order polynomial plus a continuous piecewise linear function with 60 min interval and rate constraint of 5.0E-14. - wet zenith tropospheric delays as 60 min piecewise continuous linear function, with rate constraints of 50 psec/hr - troposphere gradients: 6 hours east and north piecewise continuous linear function, at all stations, except a set of 75 stations (Appendix H), offset constraint 0.5 mm and rate constraint 2.0 mm/day - antenna axis offsets estimated for 41 stations (Appendix I) as global parameters. -------------------------------------------------------------------------------- Appendix A. List of 141 sources used for the no-net-rotation CRF condition: 0003+380 0010+405 0014+813 0109+224 0123+257 0133+476 0148+274 0149+218 0153+744 0202+319 0215+015 0219+428 0235+164 0239+108 0248+430 0256+075 0306+102 0308-611 0309+411 0342+147 0400+258 0406+121 0414-189 0422+004 0422-380 0446+112 0454+844 0457+024 0502+049 0507+179 0521-365 0530-727 0539-057 0544+273 0556+238 0615+820 0636+680 0637-752 0642+449 0707+476 0716+714 0718+793 0722+145 0723-008 0738+313 0743+259 0745+241 0749+540 0804+499 0805+410 0818-128 0820+560 0821+394 0828+493 0833+585 0839+187 0850+581 0859+470 0917+449 0917+624 0945+408 0952+179 0954+658 0955+326 0955+476 1012+232 1020+400 1038+064 1038+52A 1038+52B 1039+811 1049+215 1053+815 1057-797 1111+149 1116+128 1128+385 1130+009 1147+245 1150+497 1150+812 1213+350 1215+303 1216+487 1219+044 1221+809 1226+373 1236+077 1257+145 1308+326 1342+662 1342+663 1347+539 1418+546 1435+638 1445-161 1459+480 1504+377 1538+149 1547+507 1600+335 1606+106 1624+416 1637+574 1642+690 1656+348 1705+018 1706-174 1725+044 1726+455 1743+173 1745+624 1751+441 1800+440 1823+568 1830+285 1842+681 1849+670 1856+736 1954+513 1954-388 2017+743 2021+317 2029+121 2051+745 2052-474 2113+293 2136+141 2145+067 2150+173 2209+236 2232-488 2319+272 2320+506 3C147 3C245 3C390.3 3C418 4C67.05 CL4 OW-015 Appendix B. List of 24 stations used for the no-net-traslation and no-net-rotation of position TRF condition: ALGOPARK BR-VLBA EFLSBERG EFLSBERG FD-VLBA GILCREEK GILCREEK HARTRAO HAYSTACK HN-VLBA KASHIMA KOKEE KP-VLBA LA-VLBA MEDICINA MEDICINA MK-VLBA NL-VLBA NRAO_140 NYALES20 ONSALA60 PIETOWN WESTFORD WETTZELL Appendix C. List of 21 stations used for the no-net-translation and no-net-rotation of velocity TRF condition: ALGOPARK BR-VLBA EFLSBERG FD-VLBA GILCREEK HARTRAO HAYSTACK HN-VLBA KASHIMA KOKEE KP-VLBA LA-VLBA MEDICINA MK-VLBA NL-VLBA NRAO_140 NYALES20 ONSALA60 PIETOWN WESTFORD WETTZELL Appendix D. List of 554 sources estimated as global parameters: 0003+380 0010+405 0014+813 0109+224 0123+257 0133+476 0148+274 0149+218 0153+744 0202+319 0215+015 0219+428 0235+164 0239+108 0248+430 0256+075 0306+102 0308-611 0309+411 0342+147 0400+258 0406+121 0414-189 0422+004 0422-380 0446+112 0454+844 0457+024 0502+049 0507+179 0521-365 0530-727 0539-057 0544+273 0556+238 0615+820 0636+680 0637-752 0642+449 0707+476 0716+714 0718+793 0722+145 0723-008 0738+313 0743+259 0745+241 0749+540 0804+499 0805+410 0818-128 0820+560 0821+394 0828+493 0833+585 0839+187 0850+581 0859+470 0917+449 0917+624 0945+408 0952+179 0954+658 0955+326 0955+476 1012+232 1020+400 1038+064 1038+52A 1038+52B 1039+811 1049+215 1053+815 1057-797 1111+149 1116+128 1128+385 1130+009 1147+245 1150+497 1150+812 1213+350 1215+303 1216+487 1219+044 1221+809 1226+373 1236+077 1257+145 1308+326 1342+662 1342+663 1347+539 1418+546 1435+638 1445-161 1459+480 1504+377 1538+149 1547+507 1600+335 1606+106 1624+416 1637+574 1642+690 1656+348 1705+018 1706-174 1725+044 1726+455 1743+173 1745+624 1751+441 1800+440 1823+568 1830+285 1842+681 1849+670 1856+736 1954+513 1954-388 2017+743 2021+317 2029+121 2051+745 2052-474 2113+293 2136+141 2145+067 2150+173 2209+236 2232-488 2319+272 2320+506 3C147 3C245 3C390.3 3C418 4C67.05 CL4 OW-015 2358+189 0003-066 IIIZW2 0007+171 0008-264 0013-005 0016+731 0019+058 0026+346 0035+413 0037+139 0039+230 NGC0262 0048-097 NGC0315 0056-001 0059+581 0104-408 0106+013 0108+388 0110+495 0111+021 0112-017 0113-118 0118-272 0119+115 0119+041 0127+084 0130-171 0135-247 3C48 0146+056 0151+474 0159+723 0201+113 0202+149 0202-172 0206+136 0208-512 0212+735 0220-349 0221+067 0229+131 0234+285 0237-027 0237+040 0237-233 NGC1052 0253+133 0259+121 0300+470 0302+625 NGC1218 3C84 0317+188 0319+121 0322+222 0326+278 NRAO140 CTA26 0338-214 0341+158 NRAO150 0402-362 0403-132 0405-385 0405+305 0406-127 0409+229 0415+379 0420-014 0420+417 0423+051 0423+233 0426+273 3C120 0430+289 0434-188 0438-436 NRAO190 0440+345 0444+634 0451-282 0454-234 0458-020 0459+060 0459+135 0500+019 0506+101 0508+138 0509+152 0511-220 3C138 0524-460 0528-250 0528+134 0529+075 0537-441 0536+145 0537-286 0552+398 0554+242 0600+177 0602+673 0605-085 0607-157 0610+260 0611+131 0609+607 0620+389 0629+160 3C166 0646-306 0648-165 0650+371 0651+410 0656+082 0657+172 0710+439 0711+356 0727-115 0733-174 0735+178 0736+017 0738+491 0742+103 0743-006 0748+126 0754+100 0759+183 0805+046 0805-077 0808+019 0812+367 0814+425 0821+621 0823+033 0823-223 0826-373 0827+243 0829+046 0831+557 0834-201 0836+182 0836+710 OJ287 0859-140 0906+015 0912+297 0919-260 0920-397 0920+390 4C39.25 0925-203 0949+354 SN1993J M81 OK290 1004+141 1011+250 1014+615 1021-006 1022+194 1023+131 1030+415 1030+074 1032-199 1034-293 1042+071 1043+066 1045-188 1044+719 1053+704 1055+018 1101-536 1101+384 1104-445 1104+728 1123+264 1124-186 1125+596 1127-145 1128-047 MRK180 NGC3862 1143-245 1144+402 1144-379 1144+352 1145-071 NGC3894 1148-001 1155+169 1155+251 1156-094 1156+295 1204+124 1213-172 1217+023 1219+285 1222+037 M84 1226-028 3C273B 3C274 1237-101 M104 1239+606 1239+376 1240+381 1243-072 1244-255 1252+119 3C279 1254+571 1255-316 1300+580 1302-102 1307+121 1308+328 1313-333 OP326 1323+321 1324+224 3C286 1330+476 1334-127 1338+381 1345+125 1349-439 1351-018 1352-104 1354+195 1354-174 1354-152 1357+769 1402-012 1402+044 OQ208 1406-076 1413+135 1416+067 1417+385 1420+326 1423+146 1424+366 1424+240 1424-418 1427+543 1428+422 NGC5675 1430-178 1432+200 1433+304 1435-218 OQ172 1443-162 1444+175 1448+762 1451-375 1451-400 3C309.1 1502+106 1502+036 1504-166 1508+572 1508-055 1510-089 1511+238 1511-100 1514+197 1514-241 1519-273 1522+155 1532+016 1546+027 1548+056 1551+130 1555+001 1555-140 1557+032 1604-333 CTD93 1611+343 1614+051 1610-771 1616+063 1622-253 1622-297 NGC6251 1633+38 1636+473 NRAO512 1639+230 3C345 DA426 1656+477 1655+077 1656+053 1657-261 1705+456 1705+135 1717+178 1725+123 1727+502 NRAO530 1732+389 1734+508 1738+499 1738+476 1739+522 1741-038 NGC6454 1746+470 1749+701 1749+096 1751+288 1754+159 1758+388 1803+784 3C371 1806+456 1815-553 1817-254 1826+796 1821+107 1830+139 1831-711 3C395 1901+155 1908-201 1920-211 1922+155 1921-293 1923+210 1928+738 1926+087 1929+226 1932+204 1933-400 1936-155 1937-101 1943+228 1951+355 1952+138 1955+335 1958-179 2000+472 2000+148 2007+777 2005+642 2005+403 2005-489 2008-159 2013+163 2021+614 2022+171 2023+336 2030+547 2037-253 2059+034 2106+143 2121+053 2126-158 2128+048 2128-123 2131-021 2134+00 2143-156 2144+092 2149+056 2155-152 2155-304 VR422201 2201+315 2201+171 2205+166 2210-257 2214+350 2216-038 3C446 2227-088 2229+695 2229-172 CTA102 2234+282 2233-148 2235+731 2243-123 2245-328 2250+194 3C454.3 2252-089 2253+417 2254+074 2254+024 2255-282 2312-319 2318+049 2320-035 2328+107 2329-162 2331-240 2335-027 2337+264 2344+09A 2345-167 2351+456 2351-154 2352+495 2355-534 2355-106 2356+385 Appendix E. List of 17 sources estimated as local parameters: 0241+622 0116+319 4C+00.02 2000-330 1117+146 1748-253 1935-692 0147-076 1932+106 0302-623 0516-621 1251-407 CEN-A 2109-811 1920+154 0150-334 0335-364 Appendix F. List of 41 stations estimated as global parameters: ALGOPARK BR-VLBA EFLSBERG FD-VLBA GILCREEK HARTRAO HAYSTACK HN-VLBA KASHIMA KOKEE KP-VLBA LA-VLBA MEDICINA MK-VLBA NL-VLBA NRAO_140 NYALES20 ONSALA60 PIETOWN WESTFORD WETTZELL CRIMEA DSS45 DSS65 FORTLEZA HATCREEK HOBART26 HRAS_085 KASHIM34 KAUAI MATERA MOJAVE12 NOTO NRAO20 NRAO85_3 OV-VLBA OVRO_130 RICHMOND SANTIA12 SC-VLBA TSUKUB32 Appendix G. List of 66 stations estimated as local parameters: CHLBOLTN GOLDVENU MARPOINT JPL_MV1 MAMMOTHL FORT_ORD PRESIDIO VNDNBERG PT_REYES SANPAULA PINFLATS MON_PEAK QUINCY FLAGSTAF PLATTVIL KWAJAL26 PENTICTN YELLOWKN PBLOSSOM YUMA DEADMANL BLKBUTTE OCOTILLO PVERDES ELY VERNAL KODIAK YAKATAGA SESHAN25 MILESMON HALEAKAL SNDPOINT MCD_7850 FTD_7900 DSS15 FORTORDS GORF7102 METSHOVI BREST NOBEY_6M SEST NOME VICTORIA SEATTLE1 YLOW7296 TRYSILNO TOULOUSE AZORES HOHNBERG KIRSBERG KARLBURG HOFN TROMSONO NRAO85_1 OHIGGINS GGAO7108 MARCUS MIZNAO10 URUMQI PARKES YEBES MIAMI20 TIGOWTZL SYOWA TIGOCONC SVETLOE Appendix H. List of 69 stations for which tropospheric gradients were not estimated: CHLBOLTN GOLDVENU MARPOINT JPL_MV1 MAMMOTHL FORT_ORD PRESIDIO PT_REYES SANPAULA PINFLATS MON_PEAK QUINCY FLAGSTAF PLATTVIL KWAJAL26 PENTICTN YELLOWKN PBLOSSOM YUMA DEADMANL BLKBUTTE OCOTILLO PVERDES ELY VERNAL SHANGHAI KODIAK YAKATAGA SESHAN25 MILESMON HALEAKAL SNDPOINT SOURDOGH WHTHORSE MCD_7850 FTD_7900 DSS15 FORTORDS GORF7102 METSHOVI BREST NOBEY_6M SEST NOME VICTORIA SEATTLE1 VLBA85_3 WIDE85_3 YLOW7296 TRYSILNO TOULOUSE AZORES HOHNBERG KIRSBERG KARLBURG HOFN TROMSONO NRAO85_1 OHIGGINS GGAO7108 MARCUS MIZNAO10 URUMQI PARKES YEBES MIAMI20 TIGOWTZL SYOWA TIGOCONC Appendix I. List of 41 stations with axis offset extimated as global parameter: ALGOPARK BR-VLBA EFLSBERG FD-VLBA GILCREEK HARTRAO HAYSTACK HN-VLBA KASHIMA KOKEE KP-VLBA LA-VLBA MEDICINA MK-VLBA NL-VLBA NRAO_140 NYALES20 ONSALA60 PIETOWN WESTFORD WETTZELL CRIMEA DSS45 DSS65 FORTLEZA HATCREEK HOBART26 HRAS_085 KASHIM34 KAUAI MATERA MOJAVE12 NOTO NRAO20 NRAO85_3 OV-VLBA OVRO_130 RICHMOND SANTIA12 SC-VLBA TSUKUB32 ------------------------------------------------------------------------------------ AUTHOR: Dr. Roberto Lanotte Telespazio SpA Centro di Geodesia Spaziale "G. Colombo" 75100 Matera, Italy e-mail: lanotte@asi.it