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  • 1
    facet.materialart.
    Unbekannt
    Keuper 1:500 000 (1977)
    Berlin
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    Signatur: K 97.0096
    In: Lithologisch-paläogeographische Karte der DDR
    Zweigbibliothek: GFZ Bibliothek
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Monographie ausleihbar
    Monographie ausleihbar
    Probleme der Parameterbestimmung in physikalischen Systemen (1982)
    Bern : Univ.
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    Signatur: M 08.0365
    In: Mitteilungen der Satelliten-Beobachtungsstation Zimmerwald
    Materialart: Monographie ausleihbar
    Seiten: V, 173 S.
    Serie: Mitteilungen der Satelliten-Beobachtungsstation Zimmerwald 8
    Standort: Kompaktmagazin oben
    Zweigbibliothek: GFZ Bibliothek
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  • 3
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Lösung von Parameterbestimmungsproblemen in Himmelsmechanik und Satellitengeodäsie mit modernen Hilfsmitteln (1982)
    Zürich : Schweizer. Geodät. Komm.
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    Signatur: SR 90.0084(34)
    In: Geodätisch-geophysikalische Arbeiten in der Schweiz
    Materialart: Schriftenreihen ausleihbar
    Seiten: VII, 257 S.
    Serie: Astronomisch-geodätische Arbeiten in der Schweiz 34
    Sprache: Deutsch
    Standort: Kompaktmagazin unten
    Zweigbibliothek: GFZ Bibliothek
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  • 4
    Schriftenreihen ausleihbar
    Schriftenreihen ausleihbar
    Integrale Auswertung von Satellitenbeobachtungen (1977)
    Zürich : Schweizer. Geodät. Komm.
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    Signatur: SR 90.0084(33)
    In: Geodätisch-geophysikalische Arbeiten in der Schweiz
    Materialart: Schriftenreihen ausleihbar
    Seiten: 114 S.
    Serie: Geodätisch-geophysikalische Arbeiten in der Schweiz 33
    Sprache: Deutsch
    Standort: Kompaktmagazin unten
    Zweigbibliothek: GFZ Bibliothek
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  • 5
    Monographie Präsenzbestand
    Monographie Präsenzbestand
    Paläotektonische Analyse des suprasalinaren Deckgebirges (Anteil Trias) im Gebiet des zentralen Beckensüdrandes (Erläuterungen zu Mächtigkeits- und Fazieskarten der Trias) : Themenspezifischer Beitrag zum Forschungsthema des Zentralen Geologischen Institutes, Berlin "Komplexe Analyse und Synthese des Strukturbaues und der Paläotektonik am Südrand der Norddeutsch-Polnischen Senke" ; Forschungsaufgabe "Strukturentwicklung Mitteldeutsche Hauptabbrüche und Südrand Norddeutsch-Polnische Senke" ; Themen-Nr. 5.07.2019 ; Bericht G3 04/82 (1982)
    Potsam/Berlin : Akademie der Wissenschaften der DDR, Zentralinstitut für Physik der Erde (ZIPE), Bereich Geologie
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    Signatur: D 2043/4
    In: Forschungsaufgabe "Strukturentwicklung Mitteldeutsche Hauptabbrüche und Südrand NPS"
    Materialart: Monographie Präsenzbestand
    Seiten: 47 Blätter , graphische Darstellungen , 20 Kartenbeilagen
    Sprache: Deutsch
    Anmerkung: Inhaltsverzeichnis: 0. Aufgabenstellung. - 1. Untersuchungsmethodik. - 1.1. Mächtigkeitsanalyse. - 1.2. Faziesanalyse. - 1.3. Genauigkeitsbetrachtung. - 2. Ergebnisse: Paläotektonische Entwicklung in der Trias. - 2.1. Vorbemerkungen. - 2.2. Spezielle Ergebnisse. - 2.2.1. Unterer Buntsandstein. - 2.2.2. Mittlerer Buntsandstein. - 2.2.3. Oberer Buntsandstein. - 2.2.4. Muschelkalk. - 2.2.5. Unterer Keuper. - 2.2.6. Mittlerer Keuper. - 2.2.7. Oberer Keuper. - 2.3. Grundzüge der Deckgebirgsentwicklung während der Trias. - 3. Hinweise für Folgearbeiten. - 4. Zusammenfassung. - 5. Literaturverzeichnis. - 6. Abbildungs- und Anlagenverzeichnis. - 7. Stellungnahme der Bereichsleitung.
    Standort: 20
    Zweigbibliothek: GFZ Bibliothek
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  • 6
    Digitale Medien
    Digitale Medien
    A New Solar Radiation Pressure Model for GPS Satellites (1999)
    Springer
    GPS solutions 2 (1999), S. 50-62 
    Details
    ISSN: 1521-1886
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Architektur, Bauingenieurwesen, Vermessung , Geologie und Paläontologie
    Notizen: The largest error in currently used GPS orbit models is due to the effect of solar radiation pressure. Over the last few years many improvements were made in modeling the orbits of GPS satellites within the International GPS Service (IGS). Howeer, most improvements were achieved by increasing the number of estimated orbit and/or solar radiation pressure parameters. This increase in the number of estimated satellite parameters weakens the solutions of all estimated parameters (not only orbit parameters). Because of correlations the additional orbit parameters may introduce biases in other estimated quantities, for example the length of day. We present a recently developed solar radiation pressure model for the GPS satellites. This model is based on experiences and results gained at the Center for Orbit Determination in Europe (CODE) in the context of its IGS activities since June 1992. The performance of the new model is almost an order of magnitude better than that of the existing ROCK models. It also allows a reduction of the number of orbit parameters that have to be estimated. © 1999 John Wiley & Sons, Inc.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/PL00012757
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  • 7
    Digitale Medien
    Digitale Medien
    Analysis of the first year of Earth rotation parameters with a sub-daily resolution gained at the CODE processing center of the IGS (2000)
    Springer
    Journal of geodesy 74 (2000), S. 479-487 
    Details
    ISSN: 1432-1394
    Schlagwort(e): Key words: Sub-daily Earth rotation parameters – GPS permanent network processing – Ocean tides
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Architektur, Bauingenieurwesen, Vermessung
    Notizen: Abstract.  The solutions of the CODE Analysis Center submitted to the IGS, the International Global Position System (GPS) Service for Geodynamics, are based on three days of observation of about 80–100 stations of the IGS network. The Earth rotation parameters (ERPs) are assumed to vary linearly over the three days with respect to an a priori model. Continuity at the day boundaries as well as the continuity of the first derivatives are enforced by constraints. Since early April 1995 CODE has calculated a new ERP series with an increased time resolution of 2 hours. Again continuity is enforced at the 2-hours-interval boundaries. The analysis method is described, particularly how to deal with retrograde diurnal terms in the ERP series which may not be estimated with satellite geodetic methods. The results obtained from the first year of data covered by the time series (time interval from 4 April 1995 to 30 June 1996) are also discussed. The series is relatively homogeneous in the sense of the used orbit model and the a priori model for the ERPs. The largest source of excitation at daily and sub-daily periods is likely to be the effect of the ocean tides. There is good agreement between the present results and Topex/Poseidon ocean tide models, as well as with models based on Very Long Baseline Interferometry (VLBI) and Satellite Laser Ranging (SLR) data. Non-oceanic periodic variations are also observed in the series. Their origin is most probably a consequence of the GPS solution strategy; other possible sources are the atmospheric tides.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s001900000108
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  • 8
    Digitale Medien
    Digitale Medien
    Combining consecutive short arcs into long arcs for precise and efficient GPS Orbit Determination (1996)
    Springer
    Journal of geodesy 70 (1996), S. 287-299 
    Details
    ISSN: 1432-1394
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Architektur, Bauingenieurwesen, Vermessung
    Notizen: Abstract. The final products of the CODE Analysis Center (Center for Orbit Determination in Europe) of the International GPS Service for Geodynamics (IGS) stem from overlapping 3-days-arcs. Until 31 December, 1994 these long arcs were computed from scratch, i.e. by processing three days of observations of about 40 stations (by mid 1995 about 60 stations were used) of the IGS Global Network in our parameter estimation program GPSEST. Because one-day-arcs have to be produced first (for the purpose of error detection etc.) the actual procedure was rather time-consuming. In the present article we develop the mathematical tools necessary to form arcs based on the normal equation systems of consecutive short arcs (one-day-solutions in the case of CODE). The procedure in its simplest version is as follows: • Each short arc is described by six initial conditions and a number of dynamical orbit parameters (e.g. radiation pressure parameters). The resulting long arc in turn shall be based on n consecutive short arcs and described by six initial conditions and again the same number of dynamical parameters as in the short arcs. • By asking position and velocity to be continuous at the boundaries of the short arcs we obtain a long arc which is actually defined by one set of initial conditions and n sets of dynamical parameters (if n short arcs are combined). • By asking the dynamical parameters to be identical in consecutive short arcs, the resulting long arc is characterized by exactly the same number of orbit parameters as each of the short arcs. • This procedure is not yet optimized because formally all n sets of orbit parameters have to be set up and solved for in the long arc solution (although they are not independent). In order to allow for an optimized solution we derive all necessary relations to eliminate the unnecessary parameters in the combination. Each long arc is characterized by the actual number of independent orbit parameters. The resulting procedure is very efficient. From the point of view of the result the new procedure is completely equivalent to an actual re-evaluation of all observations pertaining to the long arc. It is much more efficient and flexible, however because it allows us to construct 2-day-arcs, 3-day-arcs, etc. based on the previously stored daily normal equation systems without requiring much additional CPU time. The theory is developed in the first four sections. Technical aspects are dealt with in appendices A and B. The actual implementation into the Bernese GPS Software system and test results are given in section 5.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00867349
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  • 9
    Digitale Medien
    Digitale Medien
    Improving the orbit estimates of GPS satellites (1999)
    Springer
    Journal of geodesy 73 (1999), S. 147-157 
    Details
    ISSN: 1432-1394
    Schlagwort(e): Key words. GPS ; Solar radiation pressure ; Orbit estimation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Architektur, Bauingenieurwesen, Vermessung
    Notizen: Abstract. The Extended Center for Orbit Determination in Europe (CODE) Orbit Model, an empirical orbit model proposed by Beutler and colleagues in 1994, has been tested extensively since January 1996. Apart from six osculating Keplerian elements, this orbit model consists of nine (instead of the conventional two) parameters to take into account the deterministic part of the force field acting on the satellites. Based on the test results an improved orbit parameterization is proposed. The new orbit parameterization consists of the conventional two parameters plus three additional parameters, a constant and two periodic terms (a cosine and a sine term), in the X-direction to model the effects of the solar radiation pressure. Results based on one full year of routine orbit estimation, using the original and the new orbit parameterization, are presented to demonstrate the superiority of the new approach. An improvement of the orbit estimates with at least a factor of two is observed!
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s001900050230
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  • 10
    Digitale Medien
    Digitale Medien
    The Iceland 1986 GPS geodetic survey: tectonic goals and data processing results (1993)
    Springer
    Journal of geodesy 67 (1993), S. 148-172 
    Details
    ISSN: 1432-1394
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Architektur, Bauingenieurwesen, Vermessung
    Notizen: Summary The 1986 GPS survey of Iceland aimed to: (1) establish geodetic control in the South Iceland Seismic Zone (SISZ), to study destructive earthquakes there, (2) measure a country-wide network to form the basis of a new first order national network. 51 points were surveyed, with 20–30 km spacings within the SISZ and 100 km spacings elsewhere. The data were processed using the Bernese GPS software Version 3. Analysis was difficult due to poor satellite geometry and short-period ionospheric variations. However, an ambiguity-fixed, ionosphere-free solution gave accuracies of 1–2 cm in the horizontal and 2–3 cm in the vertical for the SISZ network and an ambiguity-free, ionosphere-free solution yielded accuracies of about 5 cm for the country-wide network. An ionosphere-free solution for the total survey with ambiguities fixed for the SISZ network only gave marginal additional improvements over the two separate solutions. GPS surveying has continued annually in Iceland with measurements in South Iceland in 1989 and 1992 (Hackman 1991; Sigmundsson 1992) and in North Iceland in 1987, 1990 and 1992 (Jahn et al. 1992; Foulger et al. 1992).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00806254
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