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EOP series (mostly operational) & comparison  

Analysis of the EOP series | Comparison C04 - Operational series | Consistency of the EOP series |

Updated : March 24, 2009

Thereafter the "individual" series for VLBI, GPS, SLR techniques are made available to users from their beginning until the present. Most of them are operational : they are are derived from current analyses, carried out with the most recent observations. Up-dated daily (GPS) or 1/2 times per week (VLBI/SLR), they are presently used for achieving the operational combined series C04 of the EOP-PC.


They are labelled by the acronyms of the institutes or the organizations of which they originate. FORMAT OF THE SERIES can be found in the file format.eop.

Important remark concerning the application of the IAU 2000 conventions.

From the following table you can either open the series you are interested in (click on the link), or compare series after you have selected two of them, over an time span to be chosen just below (option of comparison have to be chosen below the table).



Time scale :
Modified julian date Besselian year  

Début     Fin  

Select two differents EOP series and 1 common EOP :

Series 1 Series 2 First date Read Organisation
Responsable
x y UT1-
TAI
PSI EPS dX dY dx/dt dy/dt LOD
IAU 19801 IAU 20001       mas mas ms mas mas mas mas mas/d mas/d ms
         
 COMBINED EOP series
C04 C04* 1962   Paris Observatory,
C. Bizouard, D. Gambis
1 1 1 1 1 1 1 - - 1
Bul A Bul A 1996   US Naval Observatory,
B. Wooden, B. Luzum
1 1 1 - - - - - - -
SPACE SPACE 1993 read Jet Propulsion Laboratory, R. Gross 1 1 1 - - - - 1 1 1
  GPS operational EOP series
CODE CODE 1993   Bern University, Switzerland-
U. Hugentobler
1 1 1 - - - - 1 1 1
EMR EMR 1996   Energy, Mines and Resources, Canada- R. Ferland /
P. Tetreault / C. Huot
1 1 1 - - - - 1 1 1
ESOC ESOC 1996   European Space Agency Operational Centre - John Dow 1 1 1 - - - - 1 1 1
GFZ GFZ 1996   Geoforschungzentrum, Germany - Gerd Gendt 1 1 1 - - - - 1 1 1
IGS Final IGSFinal 1996     1 1 1 - - - - - - 1
IGS Rapid IGSRapid 1996     1 1 1 - - - - - - 1
JPL JPL 1996   Jet Propulsion Laboratory, USA -
J. Zumberger
1 1 1 - - - - 1 1 1
NOAA NOAA 1996   National Oceanic and Atmospheric Administration, USA - Gerald Mader 1 1 1 - - - - 1 1 1
SIO
SIO
1996   Scripps Institution of Oceanography,USA - Y. Bock /
P. Fang
1 1 1 - - - - 1 1 1
Series 1 Series 2 First date Read Organisation
Responsable
x y UT1-
UTC
PSI EPS dX dY dx/dt dy/dt LOD
IAU 19801 IAU 20001       mas mas ms mas mas mas mas mas/d mas/d ms
         
  VLBI EOP series - * : centres providing the celestial pole offsets with respect to the IAU 2000 model
AUS AUS 1983 read Geoscience, Australia -
O. Titov
1 1 1 1 1 1 1 - - -
BKG BKG 1984 read Bundesamt fuer Kartographie and Geodaesie,Germany - A. Nothnagel / V. Thorandt 1 1 1 1 1 1 1 - - 1
BKG int. BKG int. 1999 read Bundesamt fuer Kartographie and Geodaesie,Germany -
A. Nothnagel / V. Thorandt
- - 1 - - - - - - -
CGS CGS 1980 read Centro di Geodezia Spatiale of the ASI, Italy - R. Lanotte 1 1 1 1 1 1 1 - - 1
GSFC GSFC 1979 read Goddard Space Flight Center, USA - C. Ma, L. Petrov 1 1 1 1 1 1 1 - - 1
GSFC int. GSFC int. 1997 read Goddard Space Flight Center, USA - C. Ma, L. Petrov - - 1 - - - - - - -
IAA IAA 1979 read Institute for Applied Astronomy, Russia - E. Skurikhina
1 1 1 1 1 1 1 - - -
IAA int. IAA int. 1980 read Institute for Applied Astronomy, Russia - E. Skurikhina
- - 1 - - - - - - -
IVS
(combined)
IVS* 1979 read International VLBI Service -
A. Nothnagel
1 1 1 1 1 1 1 - - 1
MAO MAO * 2000 read Main Astronomical Observatory, Ukraine - S. Bolotin 1 1 1 1 1 1 1 - - -
OPA OPA * 1984 read Observatoire de Paris, France -
S. Lambert, A.M. Gontier
1 1 1 1 1 1 1 - - 1
SPBU SPBU 1989 read St Petersburg University, Russia - M. Kudryashova 1 1 1 1 1 1 1 - - -
SPBU int.

SPBU int.

1997 read St Petersburg University, Russia - M. Kudryashova - - 1 - - - - - - -
USNO USNO 1979 read United States Naval Observatory, USA, D. Boboltz, A. Fey 1 1 1 1 1 1 1 - - 1
USNO Int. USNO 1979 read United States Naval Observatory, USA, D. Boboltz, A. Fey 1 1 1 - - - - - - -
  SLR EOP series
CGS CGS 2003   Centro di Geodezia Spatiale of the ASI, Italy - C. Luceri 1 1 - - - - - - - 1
CSR CSR 1983   Center for Space Research, USA - R. Eanes 1 1 1 - - - - - - -
DUT DUT 1993   Delft University of Technology, Nederland - R. Noomen 1 1 1 - - - - - - -
IAA IAA 1992   Institute for Applied Astronomy, Russia - I. Gayazov 1 1 1 - - - - - - 1
ILRS (combined) ILRS
1984   International Laser Ranging Service 1 1 - - - - - - - 1
MCC MCC
1984   Russian Mission Control Center, Russia - V. Glotov 1 1 - - - - - - - 1
OCA
OCA
1993 read Observatoire de la Côte d'Azur, France - P. Bério 1 1 1 - - - - - - -
Series 1 Series 2 First date Read Organisation
x y UT1-
UTC
PSI EPS dX dY dx/dt dy/dt LOD
IAU 19801 IAU 20001       mas mas ms mas mas mas mas mas/d mas/d ms
         
DORIS EOP series
CNES CNES 1999   Centre National d'Etude Spatiale, France 1 1 - - - - - - - -
JPL JPL 1993   Jet Propulsion Laboratory , USA 1 1 1 - - - - - - 1
Long term EOP series
AICAS AICAS 1900-1992 read Astronomical Institute of the Check Academy of Science, J. Vondrak, C. Ron, J. Pecek 1 1 1 1 1 - - - - -
C01 C01 1846- read Paris Observatory, D. Gambis 1846 1846 1962 1900 1900 1984 1984 - - -
Draw both series
Print offsets (Series 2-Series 1) and their uncertainties at the dates of the less sampled series

Draw offsets (Series 2-Series 1) / compute standard deviation and bias (weigthed by the uncertainties)

Spectral analysis (FFT)     both series offsets

    Amplitude Amplitude**2 Log_10(amplitude**2)
    min. frequency       max. frequency (in cycle per unit of time)
Least square fit of periodic components in the offsets (periods in unit of time)
Print residuals
 and Mean / Variance / Standard deviation / Allan variance order 1 / Polynomial of degree

    



Thank you for bringing to our knowledge any possible mistake : christian.bizouard[at]obspm.fr ([at]=@)


1Remark : the celestial pole offsets of VLBI series and combined series are provided both under the form (dψ,dε) / IAU 1980 and (dX,dY) / IAU 2000. To comply with IAU recommendations regarding high-accuracy transformation between celestial and terrestrial reference systems, it is expected that the publication of dpsi and deps representation of the celestial pole offsets with respect to the IAU 1976 precession and IAU 1980 Nutation models will stop after users have indicated that they are no longer required. Celestial pole offsets will continue to be published in the form of dX and dY with respect to the IAU 2000 precession-nutation formulation, and software to transform between the two representations is available. Some users may prefer the parameter ((dψ,dε) / IAU 2000 , and then can use the approximation (error < 1 microarcsecond over 1980-2020) : dψ sin ε0=dX dε= dY or the accurate relation, written in the chapter 5 of the IERS 2000 conventions, of which the programmation is proposed here (see IAU package 2000)