Technical description of solution cgs2002a.trf 1 - Technique: VLBI 2 - Analysis Centre: Space Geodesy Center (CGS) - Matera, Italy 3 - Software used: CALC Version: 9.12 SOLVE release: 2001.01.19 SOLVE revision: 2001.04.27 4 - Data span: 19790803 - 20011213 5 - Celestial Reference Frame: a - Nature: extragalactic b - Definition of the orientation: no-net-rotation w.r.t. ICRF-Ext1 using 153 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 13 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 15 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 457 sources (Appendix D) and as local parameters for 33 sources (Appendix E). b - Terrestrial Frame: Coordinates and velocities for 75 stations as global parameters (Appendix F) and as local parameters for 35 stations (Appendix G). The velocities of the following pairs of stations are constrained to be the same. GGAO7108 GORF7102 TIGOWTZL WETTZELL Discontinuous positions are estimated for the following stations. site epoch DSS15 920627 DSS65 970415 EFLSBERG 961001 FORTORDS 891001 MEDICINA 960701 MOJAVE12 920627 NRAO85_3 901201 PRESIDIO 891001 SOURDOGH 871201 TSUKUB32 990401 WHTHORSE 871201 YAKATAGA 871201 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 40 stations (Appendix I) as global parameters. -------------------------------------------------------------------------------- Appendix A. List of 153 sources used for the no-net-rotation CRF condition: 0003+380 0007+171 0010+405 0014+813 0047-579 0109+224 0123+257 0133+476 0148+274 0149+218 0153+744 0159+723 0202+319 0215+015 0219+428 0235+164 0239+108 0248+430 0302-623 0306+102 0308-611 0309+411 0342+147 0400+258 0406+121 0414-189 0422+004 0422-380 0423+051 0426-380 0446+112 0454+844 0454-810 0457+024 0507+179 0521-365 0530-727 0544+273 0556+238 0615+820 0636+680 0637-752 0642+449 0648-165 0707+476 0716+714 0718+793 0722+145 0723-008 0738+313 0743+259 0745+241 0749+540 0804+499 0805+410 0812+367 0818-128 0820+560 0821+394 0826-373 0829+046 0833+585 0839+187 0859+470 0912+297 0917+449 0917+624 0945+408 0954+658 0955+326 0955+476 1012+232 1020+400 1032-199 1038+064 1038+52A 1038+52B 1039+811 1049+215 1053+815 1057-797 1111+149 1116+128 1128+385 1130+009 1150+497 1150+812 1155+251 1213+350 1216+487 1219+044 1221+809 1226+373 1236+077 1251-713 1252+119 1257+145 1308+326 1342+662 1342+663 1347+539 1418+546 1435+638 1459+480 1504+377 1514+197 1538+149 1547+507 1549-790 1600+335 1606+106 1616+063 1624+416 1637+574 1642+690 1705+018 1706-174 1725+044 1726+455 1743+173 1745+624 1749+701 1751+441 1800+440 1823+568 1830+285 1842+681 1849+670 1856+736 1954+513 1954-388 2017+743 2021+317 2029+121 2030+547 2051+745 2059+034 2113+293 2136+141 2145+067 2150+173 2209+236 2229+695 2254+074 2319+272 2320+506 3C138 3C245 3C390.3 3C418 4C67.05 NRAO190 OQ172 Appendix B. List of 13 stations used for the no-net-traslation and no-net-rotation of position TRF condition: ALGOPARK DSS45 GILCREEK HARTRAO KOKEE NRAO_140 NRAO20 NYALES20 ONSALA60 SESHAN25 WESTFORD WETTZELL YEBES Appendix C. List of 15 stations used for the no-net-translation and no-net-rotation of velocity TRF condition: ALGOPARK EFLSBERG FORTLEZA GILCREEK HRAS_085 KAUAI LA-VLBA MATERA MEDICINA ONSALA60 PIETOWN RICHMOND WESTFORD WETTZELL YLOW7296 Appendix D. List of 457 sources estimated as global parameters: 0003+380 0007+171 0010+405 0014+813 0047-579 0109+224 0123+257 0133+476 0148+274 0149+218 0153+744 0159+723 0202+319 0215+015 0219+428 0235+164 0239+108 0248+430 0302-623 0306+102 0308-611 0309+411 0342+147 0400+258 0406+121 0414-189 0422+004 0422-380 0423+051 0426-380 0446+112 0454+844 0454-810 0457+024 0507+179 0521-365 0530-727 0544+273 0556+238 0615+820 0636+680 0637-752 0642+449 0648-165 0707+476 0716+714 0718+793 0722+145 0723-008 0738+313 0743+259 0745+241 0749+540 0804+499 0805+410 0812+367 0818-128 0820+560 0821+394 0826-373 0829+046 0833+585 0839+187 0859+470 0912+297 0917+449 0917+624 0945+408 0954+658 0955+326 0955+476 1012+232 1020+400 1032-199 1038+064 1038+52A 1038+52B 1039+811 1049+215 1053+815 1057-797 1111+149 1116+128 1128+385 1130+009 1150+497 1150+812 1155+251 1213+350 1216+487 1219+044 1221+809 1226+373 1236+077 1251-713 1252+119 1257+145 1308+326 1342+662 1342+663 1347+539 1418+546 1435+638 1459+480 1504+377 1514+197 1538+149 1547+507 1549-790 1600+335 1606+106 1616+063 1624+416 1637+574 1642+690 1705+018 1706-174 1725+044 1726+455 1743+173 1745+624 1749+701 1751+441 1800+440 1823+568 1830+285 1842+681 1849+670 1856+736 1954+513 1954-388 2017+743 2021+317 2029+121 2030+547 2051+745 2059+034 2113+293 2136+141 2145+067 2150+173 2209+236 2229+695 2254+074 2319+272 2320+506 3C138 3C245 3C390.3 3C418 4C67.05 NRAO190 OQ172 0003-066 IIIZW2 0013-005 0016+731 0019+058 0026+346 0035+413 NGC0262 0048-097 NGC0315 0056-001 0059+581 0104-408 0106+013 0110+495 0111+021 0112-017 0119+115 0119+041 3C48 0146+056 0151+474 0201+113 0202+149 0202-172 0208-512 0212+735 0221+067 0229+131 0234+285 0237-027 0237+040 0237-233 LSI61303 NGC1052 0256+075 0259+121 0300+470 NGC1218 3C84 0317+188 0319+121 0322+222 0326+278 NRAO140 CTA26 0338-214 0341+158 NRAO150 0402-362 0405-385 0409+229 0415+379 0420-014 0420+417 0423+233 0426+273 3C120 0430+289 0434-188 0438-436 0440+345 0444+634 0454-234 0458-020 0500+019 0511-220 0524-460 0528-250 0528+134 0529+075 0537-441 0536+145 0537-286 0539-057 0552+398 0554+242 0600+177 0602+673 0605-085 0610+260 0609+607 0620+389 3C166 0646-306 0651+410 0656+082 0657+172 0710+439 0711+356 0727-115 0733-174 0735+178 0736+017 0742+103 0743-006 0748+126 0754+100 0805+046 0808+019 0814+425 0821+621 0823+033 0827+243 0828+493 0831+557 0834-201 0836+710 OJ287 0906+015 0919-260 0920-397 0920+390 4C39.25 0925-203 0949+354 0952+179 SN1993J M81 OK290 1004+141 1014+615 1021-006 1022+194 1030+415 1030+074 1034-293 1044+719 1048-313 1053+704 1055+018 1101-536 1101+384 1104-445 1104+728 1123+264 1124-186 1127-145 MRK180 NGC3862 1144+402 1144-379 1145-071 1148-001 1156+295 1213-172 1215+303 1219+285 1222+037 M84 3C273B 3C274 1237-101 1239+376 1240+381 1243-072 1244-255 3C279 1255-316 1300+580 1302-102 1307+121 1308+328 1313-333 OP326 1323+321 3C286 1334-127 1345+125 1351-018 1352-104 1354+195 1354-174 1354-152 1357+769 1402+044 OQ208 1406-076 1413+135 1416+067 1417+385 1424+366 1424+240 1424-418 1427+543 1428+422 NGC5675 1448+762 1451-375 1451-400 3C309.1 1502+106 1502+036 1504-166 1508+572 1508-055 1510-089 1514-241 1519-273 1532+016 1546+027 1548+056 1555+001 1557+032 CTD93 1611+343 1614+051 1610-771 1622-253 1622-297 NGC6251 1633+38 1636+473 NRAO512 1639+230 3C345 DA426 1656+348 1655+077 1656+053 1657-261 1705+456 1717+178 NRAO530 1732+389 1738+499 1738+476 1739+522 1741-038 NGC6454 1746+470 1749+096 1751+288 1758+388 1803+784 3C371 1806+456 1815-553 1817-254 1826+796 1821+107 1831-711 3C395 1908-201 1920-211 1921-293 1923+210 1928+738 1929+226 1932+204 1933-400 1936-155 1937-101 1958-179 2007+777 2005+642 2005+403 2005-489 2008-159 2021+614 2037-253 CL4 2052-474 2106-413 2121+053 2126-158 2128+048 2128-123 2131-021 2134+00 2144+092 2149+056 2149-306 2155-152 VR422201 2201+315 2214+350 2216-038 3C446 2227-088 CTA102 2232-488 2234+282 2235+731 2243-123 2250+194 3C454.3 2252-089 2253+417 2254+024 2255-282 2318+049 2320-035 2328+107 2329-162 2335-027 2337+264 2344+09A 2345-167 2351+456 2352+495 2355-534 2355-106 2356+385 Appendix E. List of 33 sources estimated as local parameters: 1727+502 2023+336 0241+622 2331-240 0403-132 1045-188 2233-148 1117+146 0116+319 2000-330 0506-612 2326-477 1402-012 1943+228 1748-253 1935-692 0405+305 0516-621 2109-811 2211-388 0147-076 1349-439 M104 2143-156 1043+066 1445-161 1217+023 1226-028 1144+352 NGC3894 0335-364 1443-162 0127+084 Appendix F. List of 75 stations estimated as global parameters: ALGOPARK DSS45 GILCREEK HARTRAO KOKEE NRAO_140 NRAO20 NYALES20 ONSALA60 SESHAN25 WESTFORD WETTZELL YEBES EFLSBERG FORTLEZA HRAS_085 KAUAI LA-VLBA MATERA MEDICINA PIETOWN RICHMOND YLOW7296 BR-VLBA CRIMEA DSS15 DSS65 ELY FD-VLBA FLAGSTAF FORTORDS GGAO7108 GOLDVENU GORF7102 HATCREEK HAYSTACK HN-VLBA HOBART26 KASHIM34 KASHIMA KODIAK KP-VLBA KWAJAL26 MARCUS MARPOINT MIZNAO10 MK-VLBA MOJAVE12 MON_PEAK NL-VLBA NOBEY_6M NOME NOTO NRAO85_3 OHIGGINS OV-VLBA OVRO_130 PLATTVIL PRESIDIO PT_REYES QUINCY SANTIA12 SC-VLBA SNDPOINT SOURDOGH TIGOWTZL TROMSONO TRYSILNO TSUKUB32 URUMQI VERNAL VNDNBERG WHTHORSE YAKATAGA YUMA Appendix G. List of 35 stations estimated as local parameters: CHLBOLTN JPL_MV1 ROBLED32 MAMMOTHL PENTICTN YELLOWKN FORT_ORD BLKBUTTE PINFLATS AUSTINTX CARROLGA BERMUDA LEONRDOK MILESMON HALEAKAL MCD_7850 FTD_7900 PVERDES SANPAULA HOHENFRG METSHOVI CARNUSTY BREST GRASSE SEST VICTORIA SEATTLE1 TOULOUSE AZORES HOHNBERG KARLBURG HOFN NRAO85_1 MIAMI20 SYOWA Appendix H. List of 51 stations for which tropospheric gradients were not estimated: ELY FLAGSTAF FORTORDS GGAO7108 GORF7102 KODIAK MON_PEAK NOME PLATTVIL PRESIDIO PT_REYES QUINCY SNDPOINT SOURDOGH TROMSONO TRYSILNO VERNAL WHTHORSE YAKATAGA YUMA JPL_MV1 MAMMOTHL PENTICTN YELLOWKN FORT_ORD BLKBUTTE PINFLATS AUSTINTX CARROLGA BERMUDA LEONRDOK MILESMON HALEAKAL MCD_7850 FTD_7900 PVERDES SANPAULA HOHENFRG METSHOVI CARNUSTY BREST GRASSE VICTORIA SEATTLE1 VLBA85_3 WIDE85_3 TOULOUSE AZORES HOHNBERG KARLBURG HOFN Appendix I. List of 40 stations with axis offset extimated as global parameter: ALGOPARK DSS45 GILCREEK HARTRAO KOKEE NRAO_140 NRAO20 NYALES20 ONSALA60 WESTFORD WETTZELL EFLSBERG FORTLEZA HRAS_085 KAUAI LA-VLBA MATERA MEDICINA PIETOWN RICHMOND BR-VLBA DSS65 FD-VLBA HATCREEK HAYSTACK HN-VLBA HOBART26 KASHIM34 KASHIMA KP-VLBA MK-VLBA MOJAVE12 NL-VLBA NOTO NRAO85_3 OV-VLBA OVRO_130 SANTIA12 SC-VLBA VNDNBERG