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Titre : The DORIS satellite radio tracking system: status and plans Type de document : Article/Communication Auteurs : Claude Boucher , Auteur ; Pascal Willis
, Auteur ; Michel Kasser
, Auteur ; Richard Biancale, Auteur ; Anny Cazenave, Auteur ; M. Dorrer, Auteur ; F. Nouel, Auteur
Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 1989 Collection : International Association of Geodesy Symposia, ISSN 0939-9585 num. 102 Conférence : IAG 1989, 125th general meeting & IAG symposia 03/08/1989 12/08/1989 Edimbourg Royaume-Uni Importance : pp 391 - 399 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] bruit (théorie du signal)
[Termes IGN] données Doppler
[Termes IGN] orbitographie
[Termes IGN] positionnement par DORIS
[Termes IGN] système de référence mondialIndex. décimale : 30.62 Système de positionnement Doris Résumé : (Auteur) The goal of this paper is to present the status of the french DORIS system, the on-going developments and the plans for the future. The DORIS system is being developped by the combined efforts of three French groups : the CNES (Centre national d'Etudes Spatiales), the GRGS (Groupe de Recherche en Géodésie Spatiale) and the IGN (Institut Géographique National). DORIS is an acronym for Doppler Orbitigraphy and Radiopositioning Integrated by satellite. Its main prupose is the precise orbit determination. Nevertheless, this system will also have significant positioning applications for geodesy and geophysics. This system is being built to be the nominal French sytem for orbit determination on the joint US-French oceanographic project TOPEX/POSEIDON planned for 1992. Numéro de notice : 14693 Affiliation des auteurs : IGN+Ext (1940-2011) Thématique : POSITIONNEMENT Nature : Communication DOI : 10.1007/978-1-4615-7111-7_36 En ligne : https://doi.org/10.1007/978-1-4615-7111-7_36 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64372 Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 14693-01 30.62 Tiré à part Centre de documentation Géodésie Disponible 14693-02 30.62 Tiré à part Centre de documentation Géodésie Disponible
Titre : The GEM-T2 gravitational model Type de document : Monographie Auteurs : J.G. Marsh, Auteur ; F.J. Lerch, Auteur ; B.H. Putney, Auteur ; et al., Auteur Editeur : Washington : National Aeronautics and Space Administration NASA Année de publication : 1989 Importance : 92 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique
[Termes IGN] champ de pesanteur terrestre
[Termes IGN] erreur systématique
[Termes IGN] géoïde
[Termes IGN] harmonique sphérique
[Termes IGN] potentiel de pesanteur terrestre
[Termes IGN] poursuite de satellite
[Termes IGN] télémétrie laser
[Termes IGN] TOPEX-PoseidonIndex. décimale : 30.40 Géodésie physique Résumé : (Auteur) GEM-T2 is the latest in a series of Goddard Earth Models (GEM) of the terrestrial field. It was designed to bring modeling capabilities one step closer towards ultimately determining the TOPEX/POSEIDON satellite's radial position to an accuracy of 10-cm RMS. It also improves our models of the long wavelength geoid to support man' oceanographic and geophysical applications. GEM-T2 extends the spherical harmonic field to include more then 600 coefficients above degree 36 (which was the limit fo its predecessor, GEM-Tl). Like GEM-Tl, it was produced entirely from satellite tracking data, but it now uses nearly twice as many satellites (31 vs. 17), contain four times the number of observations (2.4 million), has twice the number of data arcs (1132), and utilizes precise laser tracking from 11 satellites. The estimation technique for the solution has been augmented to include an optimum data weighting procedure with automatic error calibration for the gravitational parameters. Results fok the GEM-T2 error calibration indicate significant improvement over previous satellite-only models. The error of commission in determining the geoid has been reduced from 155 cm in GEM-Tl.to 105 cm for GEM-T2 for the 36 x 36 portion of the field, and 141cm for the entire model. The orbital accuracies achieved using GEM-T2 are likewise improved. Also, the projected radial error on the TOPEX satellite orbit indicates 9.4 cm RMS for GEM-T2, compared to 24.1 cm for GEM-Tl. Numéro de notice : 18491 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55409 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 18491-01 30.40 Livre Centre de documentation Géodésie Disponible
Titre : The Navstar global positioning system and the polytechnic XR1 receiver Type de document : Ouvrage divers Auteurs : Navstar, Auteur ; Polytechnic electronics, Auteur Editeur : Daventry : Navstar Année de publication : 1989 Importance : 48 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie spatiale
[Termes IGN] Global Positioning System
[Termes IGN] récepteur GPS
[Termes IGN] secteur spatialIndex. décimale : 30.03 Instruments de géodésie Numéro de notice : 59993 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Plaquette / brochure Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=39575 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 59993-01 30.03 Livre Centre de documentation En réserve M-103 Disponible
Titre : The role of orbit errors in processing of satellite altimeter data Type de document : Rapport Auteurs : E.J.O. Schrama, Auteur Editeur : Delft : Netherlands Geodetic Commission NGC Année de publication : 1989 Collection : Netherlands Geodetic Commission Publications on Geodesy Sous-collection : New series num. 33 Importance : 170 p. Format : 20 x 28 cm ISBN/ISSN/EAN : 978-90-6132-239-9 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Technologies spatiales
[Termes IGN] altimétrie satellitaire par radar
[Termes IGN] données altimétriques
[Termes IGN] invariance
[Termes IGN] mécanique orbitale
[Termes IGN] orbitographie
[Termes IGN] pesanteur terrestre
[Termes IGN] Seasat
[Termes IGN] vitesse radialeRésumé : (auteur) The problem of radial orbit errors in processing of satellite altimeter data is largely due to the inaccuracy of the gravity model which is required for the computation of the trajectory of the spacecraft. A commonly used technique for removing these errors consists of minimizing the crossover differences of profiles measured by the altimeter radar.
Several versions of the technique of least squares crossover minimization have been investigated using either SEASAT observations or simulated data. In these adjustments coefficients of error functions are estimated which are either locally defined over short arc segments, globally over long arc segments, or continuously over an entire arc having a length of several days. The solution of the corresponding normal equations consists of a homogeneous and a particular part.
For each crossover minimization problem (CMP) the homogeneous solution is always given as an analytical expression describing the invariances of the altimetric sea surface with respect to the crossover differences. These invariances are described by a surface deformation function which is characteristic for the problem in question. The number of coefficients in this function equals to the rank defect of the normal matrix in the CMP.
For the particular solution of a local CMP (using "tilt and bias" functions) it was found that 2 non-intersecting and non-overlapping master arc segments have to be fixed. However for global chronological segmented CMP's (using 3 parameter sine-cosine functions) only 1 master arc segment needs to be fixed for a particular solution. For continuous CMP's a particular solution is found by including 9 constraint equations in the form of pseudo observation equations. In this case the error function consists of a Fourier series truncated at a cutoff frequency of 2.3 cycles per revolution including a 2 parameter function modeling a long periodic effect in the orbit.
The underlying problem of gravitational radial orbit errors is described by means of the linear perturbations theory, which is based on the Lagrange planetary equations. Additionally the problem is formulated by means of the Hill equations describing perturbed satellite motions in an idealized circular orbit. It is shown that the non-resonant particular radial solution of the Hill equations coincides with the first-order radial solution derived from the linear perturbations theory assuming a
near circular orbit.
The first-order radial solution has been compared with a simulated signal derived by numerical integration of the equations of motion. The simulated signal consists of the radial differences between two trajectories (resembling the SEASAT 3 day repeat configuration) integrated with different gravity models. It was found that the analytical orbit error model resembles closely the simulated signal after removal of a long periodic effect.
The validity of the general solutions of two global CMP's has been investigated by means of a simulation experiment. In this experiment crossover differences are simulated by means of the radial orbit error signal described above. In a second step it is attempted to reconstruct this signal by minimizing the simulated differences.
This experiment revealed that the general solution of the segmented CMP appears to be hampered by unrealistic velocity discontinuity effects of successive arc segment error functions. In addition, it fails to describe the C11 and S11 and higher degree and order components of a geographically correlated radial orbit error. This is not surprising since one can prove that the homogeneous solution of the segmented CMP (without velocity discontinuities) corresponds to the C00 and C10 component of the geographically correlated radial orbit error. For this reason the global segmented CMP is reformulated in a continuous approach where it is shown that the homogeneous solution coincides with the geographically correlated radial orbit error. Computations showed that the simulated signal deviates to approximately 15 cm r.m.s. with respect to the general solution of the continuous CMP.
Employing the latter technique 5 independent particular solutions of a radial orbit error signal have been computed from SEASAT crossover data. These solutions appear to be highly correlated and suggest the presence of a disturbing effect likely to be caused by gravity modeling errors. Additionally it was found that the individual solutions resemble a concentration of signal near the once per revolution frequency in the radial orbit error spectrum. This solution could in principle be used to improve a part of the gravity model that is used in the trajectory computation of the satellite.
In the last part an integrated approach is described where the problem of modeling errors in the orbit, the geoid and the permanent part of the sea surface topography (PST) caused by ocean circulation are considered simultaneously. It is argued that an application of the integrated approach is justified if simultaneously gravity model improvement is performed employing tracking data of other satellites at different inclinations and eccentricities. Other aspects of the integrated approach concern the modeling problems of the PST field, an omission effect of the gravity field and the relation with the global continuous CMP.Numéro de notice : 57963 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Rapport de recherche DOI : sans En ligne : https://www.ncgeo.nl/downloads/33Schrama.pdf Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=60322 Exemplaires(2)
Code-barres Cote Support Localisation Section Disponibilité 57963-01 21.10 Livre Centre de documentation Technologies spatiales Disponible 57963-02 21.10 Livre Centre de documentation Technologies spatiales Disponible Evaluation photogrammétrique de clichés spatiaux à l'IGN / Pierre-Yves Lecordix in Bulletin d'information de l'Institut géographique national, n° 56 (décembre 1988)
[article]
Titre : Evaluation photogrammétrique de clichés spatiaux à l'IGN Type de document : Article/Communication Auteurs : Pierre-Yves Lecordix, Auteur Année de publication : 1988 Article en page(s) : pp 71 - 72 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Photogrammétrie spatiale
[Termes IGN] photographie Challenger-LFC
[Termes IGN] photographie spatiale
[Termes IGN] révision cartographique
[Termes IGN] système spatialNuméro de notice : A1988-224 Affiliation des auteurs : IGN (1940-2011) Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=24803
in Bulletin d'information de l'Institut géographique national > n° 56 (décembre 1988) . - pp 71 - 72[article]Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 015-88021 RAB Revue Centre de documentation En réserve L003 Disponible Scene locations and overpass dates for Landsat and Spot sensors / J.C. Price in International Journal of Remote Sensing IJRS, vol 9 n° 12 (December 1988)
PermalinkL'intérêt de l'utilisation du système Cartospot pour la production de cartes topographiques / R. Simard (13/10/1988)
PermalinkLa modélisation des images spatiales : une approche générale, simple et rigoureuse / Hervé Guichard (13/10/1988)
PermalinkLe programme SPOT : premier bilan après deux ans d'exploitation, développements prévus au cours des quinze prochaines années / Gérard Brachet (13/10/1988)
PermalinkExtraction of topography from side-looking satellite systems : a case study with Spot simulation data / S.G. Ungar in Remote sensing of environment, vol 26 n° 1 (01/10/1988)
PermalinkFrom satellite altimetry to ocean topography : a survey of data processing techniques / K.F. Wakker in International Journal of Remote Sensing IJRS, vol 9 n°10-11 (October-November 1988)
PermalinkThe contribution of satellite information to operational weather forcasting : achievements and objectives in the 1990's / J. Reiff in International Journal of Remote Sensing IJRS, vol 9 n°10-11 (October-November 1988)
Permalinkn° 111 - Juillet 1988 (Bulletin de Bulletin [Société Française de Photogrammétrie et Télédétection]) / Société française de photogrammétrie et de télédétection
Permalink16ème congrès international de photogrammétrie et télédétection, Kyoto, 1-10 juillet 1988 / Raymond Brossier in Bulletin [Société Française de Photogrammétrie et Télédétection], n° 111 (Juillet 1988)
PermalinkCloud cover distribution in Indonesia / Jean-Philippe Gastellu-Etchegorry in International Journal of Remote Sensing IJRS, vol 9 n° 7 (July 1988)
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