Search Results - "Rothacher, M."

Resolution of GPS carrier-phase ambiguities in Precise Point Positioning (PPP) with daily observations by Ge, M., Gendt, G., Rothacher, M., Shi, C., Liu, J.

“…Precise Point Positioning (PPP) has been demonstrated to be a powerful tool in geodetic and geodynamic applications. Although its accuracy is almost comparable…”
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Ambiguity resolution for triple-frequency geometry-free and ionosphere-free combination tested with real data by Wang, K., Rothacher, M.

“…The recent GPS Block IIF satellites SVN62 and SVN63 and the Galileo satellites GIOVE-A, GIOVE-B, PFM and FM2 already send signals on more than two frequencies,…”
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Lithosphere strain rate and stress field orientations near the Alpine arc in Switzerland by Houlié, N., Woessner, J., Giardini, D., Rothacher, M.

“…In this study we test whether principal components of the strain rate and stress tensors align within Switzerland. We find that 1) Helvetic Nappes line (HNL)…”
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A comparison of commercially available feeds for rabbits, guinea pigs, chinchillas and degus with evidence of their diet and feeding behaviour in natural habitats by Rothacher, M, Hatt, J-M, Clauss, M

“…A large variety of pet feeds is commercially available for pet herbivores; these feeds may differ in nutrient composition from the natural diet, and may…”
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Reprocessing of a global GPS network by Steigenberger, P., Rothacher, M., Dietrich, R., Fritsche, M., Rülke, A., Vey, S.

“…During the 10 years since the official start of the International GNSS Service (IGS) in 1994 considerable improvements in the processing strategies and…”
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Assessment of high-rate GPS using a single-axis shake table by Häberling, S., Rothacher, M., Zhang, Y., Clinton, J. F., Geiger, A.

“…The developments in GNSS receiver and antenna technologies, especially the increased sampling rate up to 100 sps, open up the possibility to measure high-rate…”
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Impact of higher-order ionospheric terms on GPS estimates by Fritsche, M., Dietrich, R., Knöfel, C., Rülke, A., Vey, S., Rothacher, M., Steigenberger, P.

“…Dual frequency GPS observables only allow the elimination of the 1st–order ionospheric term. Although higher–order ionospheric terms may cause a range bias of…”
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Realization of the Terrestrial Reference System by a reprocessed global GPS network by Rülke, A., Dietrich, R., Fritsche, M., Rothacher, M., Steigenberger, P.

“…We present a GPS‐only reference frame named PDR05 (Potsdam‐Dresden‐Reprocessing TRF 2005) based on the results of a homogeneous reprocessing of a global GPS…”
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Estimation of elevation-dependent satellite antenna phase center variations of GPS satellites by SCHMID, R, ROTHACHER, M

“…A method for the estimation of the phase center variations of GPS satellite antennas using global GPS data is presented. First estimations have shown an…”
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Kinematic and reduced-dynamic precise orbit determination of low earth orbiters by Êávehla, D, Rothacher, M

“…Various methods for kinematic and reduced-dynamic precise orbit determination (POD) of Low Earth Orbiters (LEO) were developed based on zero- and…”
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A climatology of multiple tropopauses derived from GPS radio occultations with CHAMP and SAC-C by Schmidt, T., Beyerle, G., Heise, S., Wickert, J., Rothacher, M.

“…A global climatology of multiple tropopauses (MT) is discussed based on Global Positioning System (GPS) radio occultation (RO) data from the German CHAMP…”
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Estimates of the information provided by GPS slant data observed in Germany regarding tomographic applications by Bender, M., Dick, G., Wickert, J., Ramatschi, M., Ge, M., Gendt, G., Rothacher, M., Raabe, A., Tetzlaff, G.

“…The observation of GPS slant delays from ground GPS networks can be used to reconstruct spatially resolved humidity fields in the troposphere by means of…”
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Direct measurement of diurnal polar motion by ring laser gyroscopes by Schreiber, K. U., Velikoseltsev, A., Rothacher, M., Klügel, T., Stedman, G. E., Wiltshire, D. L.

“…We report the first direct measurements of the very small effect of forced diurnal polar motion, successfully observed on three of our large ring lasers, which…”
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Observations and simulations of receiver-induced refractivity biases in GPS radio occultation by Beyerle, G., Schmidt, T., Wickert, J., Heise, S., Rothacher, M., König-Langlo, G., Lauritsen, K. B.

“…An analysis of 206,422 atmospheric refractivity profiles observed by the CHAMP georesearch satellite between 14 May 2001 and 30 June 2005 reveals significant…”
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First results from the GPS atmosphere sounding experiment TOR aboard the TerraSAR-X satellite by Beyerle, G., Grunwaldt, L., Heise, S., Köhler, W., König, R., Michalak, G., Rothacher, M., Schmidt, T., Wickert, J., Tapley, B. D., Giesinger, B.

“…GPS radio occultation events observed between 24 July and 17 November 2008 by the IGOR occultation receiver aboard the TerraSAR-X satellite are processed and…”
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A new data processing strategy for huge GNSS global networks by GE, M, GENDT, G, DICK, G, ZHANG, F. P, ROTHACHER, M

“…In Global Positioning System (GPS) data analyses, large networks are usually divided into sub-networks to solve the conflict between increasing amounts of data…”
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Measuring sub-mm structural displacements using QDaedalus: a digital clip-on measuring system developed for total stations by Charalampous, E., Psimoulis, P., Guillaume, S., Spiridonakos, M., Klis, R., Bürki, B., Rothacher, M., Chatzi, E., Luchsinger, R., Feltrin, G.

“…The monitoring of rigid structures of modal frequencies greater than 5 Hz and sub-mm displacement is mainly based so far on relative quantities from…”
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GGOS-D: homogeneous reprocessing and rigorous combination of space geodetic observations by Rothacher, M., Angermann, D., Artz, T., Bosch, W., Drewes, H., Gerstl, M., Kelm, R., König, D., König, R., Meisel, B., Müller, H., Nothnagel, A., Panafidina, N., Richter, B., Rudenko, S., Schwegmann, W., Seitz, M., Steigenberger, P., Tesmer, S., Tesmer, V., Thaller, D.

“…In preparation of activities planned for the realization of the Global Geodetic Observing System (GGOS), a group of German scientists has carried out a study…”
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Integrated Global Geodetic Observing System (IGGOS)—science rationale by Rummel, R., Rothacher, M., Beutler, G.

“…The International Association of Geodesy has decided to establish an Integrated Global Geodetic Observing System (IGGOS). The objective of IGGOS is to…”
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The International GPS Service (IGS): An interdisciplinary service in support of Earth sciences by Beutler, G., Rothacher, M., Schaer, S., Springer, T.A., Kouba, J., Neilan, R.E.

“…Since 21 June 1992 the International GPS Service (IGS) produces and makes available uninterrupted time series of its products, in particular GPS observations…”
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