Class information for: |
Basic class information |
| ID | Publications | Average number of references |
Avg. shr. active ref. in WoS |
|---|---|---|---|
| 8242 | 1205 | 19.3 | 38% |
Classes in level above (level 2) |
Terms with highest relevance score |
| Rank | Term | Type of term | Relevance score (tfidf) |
Class's shr. of term's tot. occurrences |
Shr. of publ. in class containing term |
Num. of publ. in class |
|---|---|---|---|---|---|---|
| 1 | REFERENCE SYSTEMS | Author keyword | 95 | 41% | 15% | 181 |
| 2 | ASTROMETRY | Author keyword | 81 | 17% | 36% | 434 |
| 3 | HIPPARCOS | Author keyword | 32 | 49% | 4% | 47 |
| 4 | STELLAR PROPER MOTIONS | Author keyword | 9 | 83% | 0% | 5 |
| 5 | PL ASTRON | Address | 8 | 26% | 2% | 28 |
| 6 | PHOTOGRAPHIC ASTROMETRY | Author keyword | 7 | 57% | 1% | 8 |
| 7 | EUROPEAN SPACE TECHNOL ASTROPHYS | Address | 4 | 67% | 0% | 4 |
| 8 | FUNDAMENTAL STARS AND OTHER OBJECTS | Author keyword | 4 | 75% | 0% | 3 |
| 9 | ESTEC ASTROPHYS | Address | 3 | 43% | 0% | 6 |
| 10 | NIKOLAEV ASTRON OBSERV | Address | 3 | 100% | 0% | 3 |
Web of Science journal categories |
Author Key Words |
| Rank | Web of Science journal category | Relevance score (tfidf) |
Class's shr. of term's tot. occurrences |
Shr. of publ. in class containing term |
Num. of publ. in class |
LCSH search | Wikipedia search |
|---|---|---|---|---|---|---|---|
| 1 | REFERENCE SYSTEMS | 95 | 41% | 15% | 181 | Search REFERENCE+SYSTEMS | Search REFERENCE+SYSTEMS |
| 2 | ASTROMETRY | 81 | 17% | 36% | 434 | Search ASTROMETRY | Search ASTROMETRY |
| 3 | HIPPARCOS | 32 | 49% | 4% | 47 | Search HIPPARCOS | Search HIPPARCOS |
| 4 | STELLAR PROPER MOTIONS | 9 | 83% | 0% | 5 | Search STELLAR+PROPER+MOTIONS | Search STELLAR+PROPER+MOTIONS |
| 5 | PHOTOGRAPHIC ASTROMETRY | 7 | 57% | 1% | 8 | Search PHOTOGRAPHIC+ASTROMETRY | Search PHOTOGRAPHIC+ASTROMETRY |
| 6 | FUNDAMENTAL STARS AND OTHER OBJECTS | 4 | 75% | 0% | 3 | Search FUNDAMENTAL+STARS+AND+OTHER+OBJECTS | Search FUNDAMENTAL+STARS+AND+OTHER+OBJECTS |
| 7 | STAR CATALOGS | 3 | 60% | 0% | 3 | Search STAR+CATALOGS | Search STAR+CATALOGS |
| 8 | REFERENCE SYSTEM | 3 | 17% | 1% | 15 | Search REFERENCE+SYSTEM | Search REFERENCE+SYSTEM |
| 9 | RADIO STARS | 3 | 42% | 0% | 5 | Search RADIO+STARS | Search RADIO+STARS |
| 10 | ASTROMETRIC BINARIES | 2 | 67% | 0% | 2 | Search ASTROMETRIC+BINARIES | Search ASTROMETRIC+BINARIES |
Key Words Plus |
| Rank | Web of Science journal category | Relevance score (tfidf) |
Class's shr. of term's tot. occurrences |
Shr. of publ. in class containing term |
Num. of publ. in class |
|---|---|---|---|---|---|
| 1 | EXTRAGALACTIC REFERENCE SYSTEM | 59 | 90% | 2% | 26 |
| 2 | CELESTIAL REFERENCE FRAME | 41 | 55% | 4% | 51 |
| 3 | FK5 | 19 | 70% | 1% | 16 |
| 4 | OPTICAL REFERENCE FRAME | 17 | 70% | 1% | 14 |
| 5 | SECULAR ABERRATION | 17 | 100% | 1% | 8 |
| 6 | ADDITIONAL RADIO | 15 | 88% | 1% | 7 |
| 7 | J20000 | 15 | 88% | 1% | 7 |
| 8 | RADIO REFERENCE FRAME | 13 | 80% | 1% | 8 |
| 9 | SOURCE POSITIONS | 13 | 80% | 1% | 8 |
| 10 | APPARENT PLACE COMPUTATIONS | 11 | 100% | 0% | 6 |
Journals |
Reviews |
| Title | Publ. year | Cit. | Active references |
% act. ref. to same field |
|---|---|---|---|---|
| The Hipparcos mission | 1997 | 21 | 84 | 68% |
| The Flagstaff astrometric scanning transit telescope (FASTT) and star positions determined in the extragalactic reference frame | 1996 | 32 | 56 | 63% |
| Dynamic modelling of the Hipparcos attitude | 2003 | 6 | 7 | 86% |
| Introduction to a further examination of the Hipparcos data | 2003 | 2 | 7 | 100% |
| Hipparcos, the New Reduction | 2010 | 6 | 14 | 71% |
| First results from Hipparcos | 1998 | 28 | 43 | 49% |
| The operational environment of the Hipparcos mission | 2003 | 1 | 9 | 78% |
| Modelling the torques affecting the Hipparcos satellite | 2003 | 3 | 10 | 60% |
| A detailed analysis of the operational orbit of the Hipparcos satellite | 2003 | 1 | 3 | 67% |
| Some problems of wide-field astrometry with a short-focus CCD-astrograph | 1995 | 0 | 1 | 100% |
Address terms |
| Rank | Address term | Relevance score (tfidf) |
Class's shr. of term's tot. occurrences |
Shr. of publ. in class containing term |
Num. of publ. in class |
|---|---|---|---|---|---|
| 1 | PL ASTRON | 8 | 26% | 2.3% | 28 |
| 2 | EUROPEAN SPACE TECHNOL ASTROPHYS | 4 | 67% | 0.3% | 4 |
| 3 | ESTEC ASTROPHYS | 3 | 43% | 0.5% | 6 |
| 4 | NIKOLAEV ASTRON OBSERV | 3 | 100% | 0.2% | 3 |
| 5 | OPT ASTRON JOINT | 3 | 100% | 0.2% | 3 |
| 6 | UMR8630 | 2 | 25% | 0.5% | 6 |
| 7 | FUTURE PROJECTS | 1 | 100% | 0.2% | 2 |
| 8 | GRP ESTUDOS ASTRON OV | 1 | 100% | 0.2% | 2 |
| 9 | OCA CNRS URA 1360 | 1 | 100% | 0.2% | 2 |
| 10 | NVI INC | 1 | 23% | 0.4% | 5 |
Related classes at same level (level 1) |
| Rank | Relatedness score | Related classes |
|---|---|---|
| 1 | 0.0000133011 | ELLIPTIC ANOMALY//PLANETARY THEORY//PLANETARY THEORIES |
| 2 | 0.0000131807 | MECAN CELESTE CALCUL EPHEMERIDES//UMR 8028//URANIAN SATELLITES |
| 3 | 0.0000078166 | GALAXY KINEMATICS AND DYNAMICS//SOLAR NEIGHBOURHOOD//GALAXY DISC |
| 4 | 0.0000075431 | OBSERVATORY//BINARIES VISUAL//BINARIES VISUAL |
| 5 | 0.0000069743 | GEOSTATIONARY SATELLITE OPERAT TEAM//JOURNAL OF THE RADIO RESEARCH LABORATORY//DOPPLER SHIFTED FREQUENCY DSF |
| 6 | 0.0000060397 | EARTH ROTATION//POLAR MOTION//ATMOSPHERIC ANGULAR MOMENTUM |
| 7 | 0.0000054084 | TECHNIQUES PHOTOMETRIC WET//OPEN CLUSTERS AND ASSOCIATIONS INDIVIDUAL CEPHEUS OB3//ASTROMETR PHOTOMETR GRP |
| 8 | 0.0000046653 | OPEN CLUSTERS AND ASSOCIATIONS GENERAL//OPEN CLUSTERS AND ASSOCIATIONS GENERAL//GALAXY OPEN CLUSTERS AND ASSOCIATIONS GENERAL |
| 9 | 0.0000046594 | OBSERV BEIJING//ASTRONOMICAL SPECTRA//SPECTRAL LINE EXTRACTION |
| 10 | 0.0000044401 | STARS LOW MASS BROWN DWARFS//BROWN DWARFS//LOW MASS STARS |