eopc01.1846-1899.dat eng dataset Dr. Daniel Gambis Observatoire de Paris +33-1-4051-2229 +33-1-4051-2291 61, avenue de l Observatoire Paris 75014 France services.iers@obspm.fr originator 2026-02-14 ISO19115 2003 http://hpiers.obspm.fr/eoppc/eop/eopc01/eopc01.1846-1899.dat EOP C01 series of the Earth orientation parameters (1846-1899) 2026-02-14 creation Dr. Daniel Gambis Observatoire de Paris +33-1-4051-2229 +33-1-4051-2291 61, avenue de l Observatoire Paris 75014 France services.iers@obspm.fr originator EOP(IERS) C 01 is a series of the Earth Orientation Parameters given in the 1997 IERS system at 0.1 year interval (1846 - 1889) and 0.05 year interval (1890 - now). It is regularly recomputed to take advantage on one hand of the improvement of the various individual contributions and in the other hand of the refinement of the analyses procedures. This series is the basis of the IERS system. The data are stored in two files: eopc01.1846-1899 (this file) and eopc01.1900-'NOW'. completed Dr. Daniel Gambis Observatoire de Paris +33-1-4051-2229 +33-1-4051-2291 61, avenue de l Observatoire Paris 75014 France services.iers@obspm.fr originator irregular EOP, Long term series, C01, 1846-1899 eng geoscientificInformation product category: EOP; product subcategory: LONG_TERM; product name: EOP_C01 -180 +180 -90 +90 documentation: http://hpiers.obspm.fr/eoppc/eop/eopc01/EOPC01.GUIDE; data points: 640; time interval of data: 1846-1889: 0.10 years 1890-1899: 0.05 years; accuracy: - Min Max Average Average (last 365 days) sx: 0.035100 0.157870 0.066124 0.039336 sy: 0.000000 0.164320 0.077636 0.044129 sut1: 99.990000 99.990000 99.990000 99.990000 sdPsi: 0.002514 0.002514 0.002514 0.002514 sdEps: 0.001000 0.001000 0.001000 0.001000 ; data descprition: Year [yyyy.yy], x ["], sigma_x ["], y ["], sigma_y ["], ut1-tai [s], sigma_ut1-tai [s], dPsi ["], sigma_dPsi ["], dEps ["], sigma_dEps ["]; published by: IERS Earth Orientation Centre; reference: Vondrak J., Ron C., Pesek I., Cepek A., 1995, Astron. and Astrophys. 297, 899-906. --- IERS Annual reports; email subscription: http://hpiers.obspm.fr/eop-pc/products/bulletins/subscription.html OR http://www.iers.org/subscription; Available on http://www.iers.org/products : Dataset-files in .xml, .html and .csv format ASCII unknown Dr. Daniel Gambis Observatoire de Paris +33-1-4051-2229 +33-1-4051-2291 61, avenue de l Observatoire Paris 75014 France services.iers@obspm.fr originator free of charge http://hpiers.obspm.fr/eoppc/eop/eopc01/eopc01.1846-1899.dat dataset