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Oceanwide prediction of gravity anomalies and sea surface heights using GEOS-3, Seasat, and Geosat altimeter data and Etopo5u bathymetric data / Tomislav Basic (1992)

Public Titre : Oceanwide prediction of gravity anomalies and sea surface heights using GEOS-3, Seasat, and Geosat altimeter data and Etopo5u bathymetric data Type de document : Monographie Auteurs : Tomislav Basic, Auteur ; R.H. Rapp, Auteur Editeur : Colombus (Ohio) : Ohio State University Année de publication : 1992 Collection : Department of Geodetic Science and Surveying Reports num. 416 Importance : 89 p. Format : 21 x 27 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Nivellement [Termes IGN] anomalie de pesanteur [Termes IGN] bathymétrie [Termes IGN] données altimétriques [Termes IGN] GEOSAT [Termes IGN] pesanteur terrestre [Termes IGN] Seasat [Termes IGN] surface de la mer Index. décimale : 30.50 Nivellement - généralités Numéro de notice : 12096 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=54526

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12096-01	30.50	Livre	Centre de documentation	Géodésie	Disponible

Satellites et capteurs / Jean Cassanet (1990)

Public Titre : Satellites et capteurs Type de document : Monographie Auteurs : Jean Cassanet, Auteur Mention d'édition : 4 Editeur : Paris : Paradigme Année de publication : 1990 Collection : Télédétection satellitaire num. 1 Importance : 141 p. Format : 15 x 21 cm ISBN/ISSN/EAN : 978-2-86878-008-9 Langues : Français (fre) Descripteur : [Vedettes matières IGN] Technologies spatiales [Termes IGN] atmosphère terrestre [Termes IGN] capteur (télédétection) [Termes IGN] force de gravitation [Termes IGN] HCMM [Termes IGN] lanceur spatial [Termes IGN] Landsat [Termes IGN] mécanique céleste [Termes IGN] Meteosat [Termes IGN] navette spatiale [Termes IGN] Nimbus [Termes IGN] NOAA (satellite) [Termes IGN] orbite [Termes IGN] rayonnement électromagnétique [Termes IGN] satellite artificiel [Termes IGN] satellite d'observation de la mer [Termes IGN] satellite météorologique [Termes IGN] Seasat [Termes IGN] SkyLab [Termes IGN] SOYOUZ [Termes IGN] Spacelab [Termes IGN] SPOT1 [Termes IGN] TIROS Résumé : (Auteur) Ce volume expose, dans une première partie, les principes physiques mis en jeu lors de l'acquisition des données de télédétection satellitaire, et présente, dans une seconde, les caractéristitiques des principales missions d'observation de la Terre. Il est dû à Jean CASSANET, professeur de Sciences physiques, qui a soutenu au Laboratoire de géographie de l'Ecole Normale Supérieure à Montrouge, une thèse de troisième cycle d'océanographie spatiale et participe actuellement à une expérimentation de la Direction des Lycées et Collèges consacrée à l'utilisation de la télédétection dans l'enseignement secondaire. Note de contenu : Première partie : généralités 1. Satellites artificiels 2. Capteurs Deuxième partie : les missions de télédétection satellitaire 3. Skylab 4. Landsat 1, 2 et 3 5. Landsat 4 et 5 6. NOAA 2 a 5 7. Tiros n, noaa 6 a 11 8. HCMM 9. Nimbus 7 10. Soyouz 22 11. Seasat 1 12. La navette spatiale et spacelab 13. Meteosat 14. Spot 15. Mos-1 16. Ers-1 Numéro de notice : 16620 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55200

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
16620-01	21.20	Livre	Centre de documentation	Technologies spatiales	Disponible
16620-02	21.20	Livre	Centre de documentation	Technologies spatiales	Disponible

The role of orbit errors in processing of satellite altimeter data / E.J.O. Schrama (1989)  

Public 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 radiale Résumé : (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

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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

Interpretation of Seasat radar-altimeter data over sea ice using near-simultaneous SAR imagery / Lars M.H. Ulander in International Journal of Remote Sensing IJRS, vol 8 n° 11 (November 1987)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 8 n° 11 (November 1987) . - pp 1679 - 1686 Titre : Interpretation of Seasat radar-altimeter data over sea ice using near-simultaneous SAR imagery Type de document : Article/Communication Auteurs : Lars M.H. Ulander, Auteur Année de publication : 1987 Article en page(s) : pp 1679 - 1686 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photo-interprétation [Termes IGN] altimètre radar [Termes IGN] Arctique, océan [Termes IGN] Beaufort, mer de [Termes IGN] données altimétriques [Termes IGN] glace de mer [Termes IGN] image radar [Termes IGN] photo-interprétation [Termes IGN] radar à antenne synthétique [Termes IGN] rétrodiffusion [Termes IGN] Seasat Numéro de notice : A1987-362 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431168708954807 En ligne : https://doi.org/10.1080/01431168708954807 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=24435 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-87111	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Saturation effects in the Seasat altimeter receiver / D.J. Wingham in International Journal of Remote Sensing IJRS, vol 8 n° 8 (August 1987)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 8 n° 8 (August 1987) . - pp 1163 - 1173 Titre : Saturation effects in the Seasat altimeter receiver Type de document : Article/Communication Auteurs : D.J. Wingham, Auteur ; C.G. Rapley, Auteur Année de publication : 1987 Article en page(s) : pp 1163 - 1173 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] altimètre radar [Termes IGN] artefact [Termes IGN] Seasat Numéro de notice : A1987-160 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431168708954762 En ligne : https://doi.org/10.1080/01431168708954762 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=24253 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-87081	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Precise orbit computation, gravity model adjustment and altimeter data processing for the ERS-1 altimetry mission / K.F. Wakker (1987)

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vol 8 n°1 - 4 - January - December 1984 - Satellite altimetry (Bulletin de Marine geodesy) / G. Born

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vol 87 n° C5 - 30/04/1982 - SEASAT 1 altimetry (Bulletin de Journal of geophysical research : Oceans) / American Geophysical Union  

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Validation of SEASAT-1 altimetry using ground truth in the North Sea Region / J. Brennecke (1982)

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Utilisation pour l'océanologie des satellites d'observation de la Terre / J.L. Hyacinthe (1978)

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Les satellites de ressources terrestres et géodésiques / Charles Cazabat (1977)

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Les instruments embarqués sur les satellites de télédétection actuels et futurs / L. Laidet (1976)

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