The Operational Environment of the Hipparcos Mission

Van Leeuwen, Floor; Penston, Margaret J.
May 2003
Space Science Reviews;May2003, Vol. 108 Issue 3, p471
Academic Journal
We investigate links between the observational environment as experienced by the Hipparcos satellite and the performance of the spacecraft and payload instrumentation, with particular emphasis on finding out whether some of these effects may have been inadequately represented in instrument calibrations and could thus have affected the scientific results of the mission. Scan-coverage and radiation effects are primarily random effects with only some long-term systematics. However, long- (days to weeks) and short-term (hours) temperature variations reflected in the performance of some of the spacecraft instrumentation. It is shown that only a small sign of some long-term thermal variations could be detected in the payload instrumentation. These findings further limit the scope left for the occurrence of large-scale correlated errors in the Hipparcos astrometric data. On the other hand, a number of great circles were identified which showed a highly significant drift of the basic angle, which had not been detected in the preparation of the published data. The data from these circles may have, in some cases, led to, very localised, slightly anomalous results, in particular where stars are accidentally affected by two or more of such circles.


Related Articles

  • Introduction to a Further Examination of the Hipparcos Data. Van Leeuwen, Floor; Fantino, Elena // Space Science Reviews;May2003, Vol. 108 Issue 3, p447 

    We present an introduction to four papers on further analysis of the raw Hipparcos data. This analysis has lead to the recognition of how orbit, radiation and temperature conditions did or didn't affect the scientific results of the Hipparcos mission. It also led the way to a new reduction of...

  • Satellite delay spells shortage of star data. Abbott, Alison // Nature;5/2/2002, Vol. 417 Issue 6884, p6 

    Reports on the impact of the delay of the launch of the DIVA satellite on the acquisition of astrometry data in Germany. Difficulty of locating the exact position of objects in space; Capability of the satellite to map millions of stars; Documentation of the movement of stars in relation to...

  • Hipparcos: The Stars in Three Dimensions. Perryman, Michael // Sky & Telescope;Jun99, Vol. 97 Issue 6, p40 

    Discusses some of the results of investigations into the Hipparcos satellite. Results of Hipparcos positional measurements; Description of stars in the Hipparcos catalog; Comparison of the `Catalogue of Nearby Stars' with the Hipparcos results.

  • The pointing system of the Herschel space observatory. Sánchez-Portal, Miguel; Marston, Anthony; Altieri, Bruno; Aussel, Hervé; Feuchtgruber, Helmut; Klaas, Ulrich; Linz, Hendrik; Lutz, Dieter; Merín, Bruno; Müller, Thomas; Nielbock, Markus; Oort, Marc; Pilbratt, Göran; Schmidt, Micha; Stephenson, Craig; Tuttlebee, Mark // Experimental Astronomy;Jul2014, Vol. 37 Issue 2, p453 

    We present the activities carried out to calibrate and characterise the performance of the elements of attitude control and measurement on board the Herschel spacecraft. The main calibration parameters and the evolution of the indicators of the pointing performance are described, from the...

  • Science performance of Gaia, ESA's space-astrometry mission. Bruijne, J. // Astrophysics & Space Science;Sep2012, Vol. 341 Issue 1, p31 

    Gaia is the next astrometry mission of the European Space Agency (ESA), following up on the success of the Hipparcos mission. With a focal plane containing 106 CCD detectors, Gaia will survey the entire sky and repeatedly observe the brightest 1,000 million objects, down to 20 magnitude, during...

  • A Physical Method for the Calibration of the AVHRR/3 Thermal IR Channels. Part II: An In-Orbit Comparison of the AVHRR Longwave Thermal IR Channels on board MetOp-A with IASI. Mittaz, Jonathan; Harris, Andrew // Journal of Atmospheric & Oceanic Technology;Sep2011, Vol. 28 Issue 9, p1072 

    Obtaining stable and accurate satellite radiances for climate change research requires extremely high standards for satellite calibration. Many satellite sensors do not currently meet the accuracy criteria, especially heritage sensors such as the Advanced Very High Resolution Radiometer (AVHRR),...

  • Spatial and Temporal Homogeneity of Solar Surface Irradiance across Satellite Generations. Posselt, Rebekka; Mueller, Richard; Stöckli, Reto; Trentmann, Jörg // Remote Sensing;May2011, Vol. 3 Issue 5, p1029 

    Solar surface irradiance (SIS) is an essential variable in the radiation budget of the Earth. Climate data records (CDR's) of SIS are required for climate monitoring, for climate model evaluation and for solar energy applications. A 23 year long (1983-2005) continuous and validated SIS CDR based...

  • Astrometric Orbits from a Direct Combination of Ground-Based Catalogs with the Hipparcos Catalog. Goncharov, G. A.; Kiyaeva, O. V. // Astronomy Letters;Apr2002, Vol. 28 Issue 4, p261 

    A direct combination of 57 ground-based astrometric observational catalogs with the Hipparcos catalog made it possible to detect and analyze nonlinear motions of the photocenters of several tens of unresolved stellar pairs during 1938-1995. We separated these motions into the barycenter proper...

  • From Hipparchus to Hipparcos. Turon, Catherine // Sky & Telescope;Jul97, Vol. 94 Issue 1, p28 

    Discusses the astrometry and astronomical photometry missions of the Hipparcos artificial satellite. Cooperation between professional and amateur observers to obtain positional and photometric data; Measurement of accurate stellar distances; Tracking of stellar variables; Observations of...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics