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Foelsche, U., A. Gobiet, A. Löscher, G. Kirchengast, A.K. Steiner, J. Wickert, and T. Schmidt, The CHAMPCLIM project: An overview, in Earth observation with CHAMP - Results from three years in orbit, C. Reigber, H. Lühr, P. Schwintzer, and J. Wickert (Eds.), Springer, Berlin-Heidelberg-New York, 615-620, 2005. [pdf (526kB); req. print]

Foelsche, U., A. Gobiet, A.K. Steiner, G. Kirchengast, M. Borsche, T. Schmidt, and J. Wickert, Observing Earth's climate with Radio Occultation data from the CHAMP Satellite in "Festschrift on the Occasion of the 75th Birthday of em.Univ.Prof. Dr. S.J. Bauer", edited by H.O. Rucker and R. Leitinger, Publ. by Inst. for Space Research/Austrian Acad. of Sciences and Inst. for Geophys., Astrophys., and Meteorol./Univ. of Graz, Austria, 45-74, 2005.

Gobiet, A.Radio Occultation Data Analysis for Climate Change Monitoring and First Climatologies from CHAMP Sci. Rep. No. 6-2005, ISBN 3-9502126-3-9, Wegener Center Verlag Graz, Austria, 2005. [pdf (14MB); req. print]

Gobiet, A., U. Foelsche, A.K. Steiner, M. Borsche, G. Kirchengast, and J. Wickert, Climatological validation of stratospheric temperatures in ECMWF operational analyses with CHAMP radio occultation data, Geophys. Res. Lett., 32, L12806, doi:10.1029/2005GL022617, 2005. [pdf (428kB); req. print]

Gobiet, A., G. Kirchengast, J. Wickert, C. Retscher, D.-Y. Wang , A. Hauchecorne, Evaluation of Stratospheric Radio Occultation Retrieval Using Data from CHAMP, MIPAS, GOMOS, and ECMWF Analysis Fields, in Earth observation with CHAMP - Results from three years in orbit, C. Reigber, H. Lühr, P. Schwintzer, and J. Wickert (Eds.), Springer, Berlin-Heidelberg-New York, 531-536, 2005. [pdf (325kB); req. print]

Gorbunov, M.E., and G. Kirchengast, Advanced Wave-Optics Processing of LEO-LEO Radio Occultation Data in Presence of Turbulence, Tech. Report for ESA/ESTEC No. 1/2005, 52 p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2005. [pdf (~2.1MB); req. print]

Gorbunov, M.E., and G. Kirchengast, Processing X/K band radio occultation data in the presence of turbulence, Radio Sci., 40, RS6001, doi:10.1029/2005RS003263, 2005. [pdf (399kB); req. print]

Kirchengast, G., and the ACEPASS Study Consortium, The ACE+ Phase A Scientific Support Study ACEPASS: Summary Report, Tech. Report for ESA/ESTEC No. 2/2005, 16 p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2005. [pdf (~1.3MB); req. print]

Kirchengast, G., and the ACCURATE Team ACCURATE - Atmospheric Climate and Chemistry in the UTLS Region and Climate Trends ExplorerEarth Explorer Core Mission Proposal to ESA Ref.No. CCM2-13, 19p., Wegener Center, Univ. of Graz, Austria, 2005. [req. print]

Lackner, B.C., and B. Pirscher Climate Diagnostics in Radio Occultation Temperature Climatologies of CHAMP and ECMWF Sci. Rep. No. 7-2005, ISBN 3-9502126-4-7, Wegener Center Verlag Graz, Austria, 2005. [pdf (27MB); req. print]

Schwaerz M., and G. Kirchengast A joint temperature, humidity, ozone, and SST retrieval processing system for IASI sensor data. Properties and retrieval performance analysis, in Proceedings of the 14th International TOVS Study Conference, pp. 372-381, 2005.

Steiner, A.K., and G. Kirchengast, Error analysis for GNSS radio occultation data based on ensembles of profiles from end-to-end simulations, J. Geophys. Res., 110, D15307, doi:10.1029/2004JD005251, 2005. [pdf (~4.5MB); req. print]

Wickert J, A. Gobiet, G. Beyerle, A.K. Steiner, G. Kirchengast, U. Foelsche, and T. Schmidt, GPS radio occultation with CHAMP: Comparison of atmospheric profiles from GFZ Potsdam and IGAM Graz, in Earth observation with CHAMP - Results from three years in orbit, C. Reigber, H. Lühr, P. Schwintzer, and J. Wickert (Eds.), Springer, Berlin-Heidelberg-New York, 525 - 530, 2005. [pdf (326kB); req. print]

Foelsche, U., Entwicklung extremer Wetterereignisse und regionale Auswirkungen auf Österreich, in Extreme Wetterereignisse - Auswirkungen und Auswege für betroffene österreichische Wirtschaftssektoren, K. Steininger, C. Steinreiber, and C. Ritz (Eds.), Springer, Berlin-Heidelberg, 25–39, 2004. [ req. print]

Foelsche, U., and G. Kirchengast, Sensitivity of GNSS occultation profiles to horizontal variability in the troposphere: A simulation study, in Occultations for Probing Atmosphere and Climate, G. Kirchengast, U. Foelsche, A.K. Steiner (Eds.), Springer, Berlin-Heidelberg-New York, 127-136, 2004. [req. print]

Foelsche, U., and G. Kirchengast, Sensitivity of GNSS radio occultation data to horizontal variability in the troposphere, Phys. Chem. Earth, 29(2-3), 225-240, doi:10.1016/j.pce.2004.01.007, 2004. [req. print]

Gobiet, A., and G. Kirchengast, Advancements of GNSS radio occultation retrieval in the upper stratosphere for optimal climate monitoring utility, J. Geophys. Res., 109, D24110, doi:10.1029/2004JD005117, 2004. [pdf (464 kB);req. print]

Gobiet, A., and G. Kirchengast, Advancement of GNSS radio occultation retrieval in the upper stratosphere, in Occultations for Probing the Atmosphere and Climate, G. Kirchengast, U. Foelsche, A.K. Steiner (Eds.), Springer, Berlin-Heidelberg-New York, 137-148, 2004. [req. print]

Gobiet, A., A.K. Steiner, C. Retscher, U. Foelsche, and G. Kirchengast, Radio Occultation Data and Algorithms Validation Based on CHAMP/GPS Data, Tech. Report for ASA No. 1/2004, 50 p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2004. [pdf(~4.2MB); req. print]

Gobiet, A., H. Truhetz, and G. Kirchengast, reclip:more - IGAM Report #1, Project Year 1 (Nov 2003 -Jun 2004), Tech. Report for ARC No. 1/2004, 38 p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2004. [pdf(~14.4MB); req. print]

Hanssen, R., A. Walpersdorf, K.-P. Johnsen, H. van der Marel, and U. Foelsche (Eds.), Probing the Atmosphere with Geodetic Techniques, Phys. Chem. Earth, special issue 29(2-3), 2004. [req. print]

Kirchengast, G., Occultations for Probing Atmosphere and Climate: Setting the Scene, in Occultation for Probing Atmosphere and Climate, G. Kirchengast, U. Foelsche, A.K. Steiner (Eds.), Springer, Berlin-Heidelberg-New York, 1-8, 2004. [pdf(460kB); req. print]

Kirchengast, G., and P. Høeg, The ACE+ Mission: An Atmosphere and Climate Explorer based on GPS, GALILEO, and LEO-LEO Radio Occultation, in Occultation for Probing Atmosphere and Climate, G. Kirchengast, U. Foelsche, A.K. Steiner (Eds.), Springer, Berlin-Heidelberg-New York, 201-220, 2004. [pdf(~2.8MB); req. print]

Kirchengast, G., U. Foelsche, A.K. Steiner (Eds.), Occultations for Probing Atmosphere and Climate, Springer, Berlin-Heidelberg-New York, 2004. [req. print]

Kirchengast, G., J. Fritzer, M. Schwaerz, S. Schweitzer, and L. Kornblueh, The Atmosphere and Climate Explorer Mission ACE+: Scientific Algorithms and Performance Overview, Tech. Report for ESA/ESTEC No. 2/2004, 32 p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2004. [pdf(~3.6MB); req. print]

Kirchengast, G., S. Schweitzer, J. Ramsauer, J. Fritzer, and M. Schwaerz, Atmospheric Profiles Retrieved from ACE+ LEO-LEO Occultation Data: Statistical Performance Analysis using Geometric Optics Processing, Tech. Report for ESA/ESTEC No. 1/2004, 135 p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2004. [pdf(~7.7MB); req. print]

Löscher, A., Assimilation of GNSS Radio Occultation Data into GCM Fields for Global Climate Analysis, Ph.D. thesis, Wissenschaftl. Ber. No. 22, 211p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2004. [pdf(~40MB); req. print]

Pock, M., Langwellenstrahlungstransfer in der Atmosphäre und seine Sensitivität zu Änderungen der Wasserdampfkonzentration, M.Sc. thesis, Wissenschaftl. Ber. No. 18, 116p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2004. [pdf (~4.4MB); req. print]

Rehrl, C., and G. Kirchengast, Mesospheric temperature and ozone sounding by the SMAS solar occultation sensor, in Occultation for Probing Atmosphere and Climate, G. Kirchengast, U. Foelsche, A.K. Steiner (Eds.), Springer, Berlin-Heidelberg-New York, 333-342, 2004.

Retscher, C., A. Gobiet, and G. Kirchengast, Stratospheric temperature and ozone sounding with ENVISAT/GOMOS stellar occultation, Occultation for Probing Atmosphere and Climate, G. Kirchengast, U. Foelsche, A.K. Steiner (Eds.), Springer, Berlin-Heidelberg-New York, 299-308, 2004.

Retscher, C., C. Rehrl, A. Gobiet, and G. Kirchengast, Stellar Occultation Algorithm and Validation for GOMOS on Envisat and a Performance Analysis for the Complementary Solar Occultation Concept SMAS, Tech. Report for ESA/ESTEC No. 2/2004, 110p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2004. [pdf(~5MB); req. print]

Retscher, C., Stratospheric Ozone and Temperature Sounding by the Envisat/GOMOS Stellar Occultation Sensor, Ph.D. thesis, Wissenschaftl. Ber. No. 23, 181p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2004. [pdf(~8MB); req. print]

Schwärz, M., Joint Temperatur, Humidity, Ozone, and Sea Surface Temperature Retrieval from Infrared Atmospheric Sounding Interferometer Data, Ph.D. thesis, Wissenschaftl. Ber. No. 21, 188p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2004. [pdf (~9MB); req. print]

Schweitzer, S., Atmosphere and Climate Explorer Mission ACE+: Humidity and Temperature Retrieval Performance Analysis, M.Sc. thesis, Wissenschaftl. Ber. No. 20,153p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2004. [pdf (~8.4MB); req. print]

Steiner, A.K., Error analyses of refractivity profiles retrieved from CHAMP radio occultation data, DMI Scientific Report 04-02, DMI, Copenhagen, Denmark, 2004. [pdf(~1.1MB); req. print]

Steiner, A.K., and G. Kirchengast, Ensemble-based analysis of errors in atmospheric profiles retrieved from GNSS occultation data, Occultation for Probing Atmosphere and Climate, G. Kirchengast, U. Foelsche, A.K. Steiner (Eds.), Springer, Berlin-Heidelberg-New York, 149-160, 2004. [pdf(~3MB); req. print]

Steiner, A.K., A. Gobiet, U. Foelsche, and G. Kirchengast, Radio occultation data processing advancements for optimizing climate utility, Tech. Report for ASA No. 3/2004, 87p., Inst. f. Geophys., Astrophys., and Meteorol., Univ. Graz, Austria, 2004. [pdf (~13.6MB); req. print]

Von Engeln, A., G. Nedoluha, and G. Kirchengast Deviation from a Hydrostatic Atmosphere in Radio Occultation Data in Occultations for Probing Atmosphere and Climate, G. Kirchengast, U. Foelsche, A.K. Steiner, (Eds.), 119-126, Springer, Berlin-Heidelberg-New York, 2004. [pdf (0.5MB)]

Engeln, A.v., G. Nedoluha, G. Kirchengast, and S. Bühler, One-dimensional variational (1-D Var) retrieval of temperature, water vapor, and a reference pressure from radio occultation measurements: A sensitivity analysis, J. Geophys. Res., 108(D11), 4337, doi:10.1029/2002JD002908, 2003. [pdf (480kB); req. print]

Foelsche, U., G. Kirchengast, and A.K. Steiner, Global climate monitoring based on CHAMP/GPS radio occultation data, in First CHAMP Mission Results for Gravity, Magnetic and Atmospheric Studies, C. Reigber, H. Lühr, and P. Schwintzer (Eds.). Springer, Berlin-Heidelberg-New York, 397–407, 2003. [pdf (742kB); req. print]

Kirchengast G., U. Foelsche, and A.K. Steiner, Climate monitoring using GNSS occultation: Promises, achievements, and challenges, DMI Report 03-09, Proc. 4th Oersted Int'l Science Team Conference (OIST-4) Sept. 2002, DMI, Copenhagen, Denmark, 269–274, 2003.

Ramsauer, J., J. Fritzer, U. Foelsche, and G. Kirchengast, Final report for GNSS Receiver for Atmospheric Sounding (GRAS) test data generation, Techn. Report for EUMETSAT No. 3/2003, 99p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2003.

Schwärz M., and G. Kirchengast, Joint temperature, humidity, and sea surface temperature retrieval from IASI sensor data, in Proceedings of the Thirteenth International TOVS Study Conference, Ste-Adele, Quebec, Canada, October-November 2003. [req. print]

Schweitzer S., G. Kirchengast, J. Ramsauer, J. Fritzer, and M. Schwaerz, Atmospheric Profiles Retrieved from ACE+ LEO-LEO Occultation Data: Performance Analysis for Instrumental Errors using Geometric Optics Processing, Tech. Report for ESA/ESTEC No. 2/2003, 76 p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2003. [req. print]

Steiner, A. K., and G. Kirchengast, Empirical error analysis of GNSS radio occultation data, DMI Report 03-09, Proc. 4th Oersted Int'l Science Team Conference (OIST-4), Sept. 2002, DMI, Copenhagen, Denmark, 347, 2003.

Steiner A.K., U. Foelsche, A. Gobiet, and G. Kirchengast, Simulation studies on the analysis of radio occultation data, Proceedings of the 2nd GRAS-SAF user workshop, June 11-13, Helsingør, Denmark, EUMETSAT, Darmstadt, 2003.

Weisz, E., G. Kirchengast, and J.A. Lerner, An efficient channel selection method for Infrared Atmospheric Sounding Interferometer data and characteristics of retrieved temperature profiles, Wissenschaftl. Ber. No. 15 34p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2003.[pdf(~1.2MB); req. print]

Foelsche, U., and G. Kirchengast, A simple "geometric" mapping function for the hydrostatic delay at radio frequencies and assessment of its performance, Geophys. Res. Lett., 29(10), 10.1029/2001GL013744, 111-1–111-4, 2002. [pdf(382kB); req. print]

Foelsche, U., and G. Kirchengast, Sensitivity of atmospheric profiles retrieved from GNSS occultation data to horizontal variability in the troposphere, Techn. Report for ESA/ESTEC No. 2/2002, 56p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2002. [pdf(~4.2MB); req. print]

Gobiet, A., G. Kirchengast, U. Foelsche, A.K. Steiner, and A. Löscher, Advancements of GNSS occultation retrieval in the stratosphere for climate monitoring, Proc. 2002 EUMETSAT Meteorol. Satellite Data Users Conference, Sept. 2002, Dublin, Ireland, 633–641, 2002. [pdf(835kB); req. print]

Gobiet, A., and G. Kirchengast, Sensitivity of atmospheric profiles retrieved from GNSS occultation data to ionospheric residual and high-altitude initialization errors, Techn. Report for ESA/ESTEC No. 1/2002, 58p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2002. [pdf(~7.2MB); req. print]

Hoeg, P., and G. Kirchengast, ACE+ – Atmosphere and Climate Explorer based on GPS, GALILEO, and LEO-LEO radio occultation (ESA Earth Explorer Opportunity Mission Proposal), Wissenschaftl. Ber. No. 14, 121p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2002. [pdf(~2.8MB); req. print]

Kirchengast, G., Climate change monitoring by radio occultation: From simulation studies via CHAMP to COSMIC and ACE+ constellations, Preprint Vol. COSMIC Radio Occ. Science Workshop, Aug. 2002, Boulder, CO, U.S.A., 6.2-1–6.2-4, 2002. [pdf(953kB); req. print]

Kirchengast, G., and J. Ramsauer, Definition of cases for GNSS Receiver for Atmospheric Sounding (GRAS) test data generation, Techn. Report for EUMETSAT No. 1/2002, 23p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2002.

Kirchengast, G., J. Fritzer, and J. Ramsauer, End-to-end GNSS Occultation Performance Simulator Version 4 (EGOPS4) Software User Manual (Overview and Reference Manual), Techn. Report for ESA/ESTEC No. 3/2002, 472p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2002. [pdf-Ov(531kB), pdf-Ref(~1.2MB); req. print]

Lerner, J.A., E. Weisz, and G. Kirchengast, Temperature and humidity retrieval from simulated Infrared Atmospheric Sounding Interferometer (IASI) measurements, J. Geophys. Res., 107(D14), 10.1029/2001JD900254, 4-1–4-11, 2002. [pdf(435kB); req. print]

Lesne, O., J. Haase, G. Kirchengast, J. Ramsauer, and W. Poetzi, Sensitivity analysis for airborne sounding of the troposphere by GNSS radio occultation, Phys. Chem. Earth, 27, 291–299, 2002. [pdf(~1.5MB); req. print]

Retscher, C., G. Kirchengast, and A. Hauchecorne, Middle atmospheric ozone sounding by the ENVISAT/GOMOS stellar occultation sensor, Proc. CD-Rom 29th Int'l Symp. on Remote Sensing of Environment (Paper TS 1.5), Apr. 2002, Buenos Aires, Argentina, 4p., 2002. [pdf(412kB); req. print]

Elgered, G., A. Hauchecorne, E. Kaas, G. Kirchengast, S. Leroy, D. Offiler, J. Guijarro, and P. Silvestrin, WATS - The Water Vapour and Temperature in the Troposphere and Stratosphere Mission, part of "Reports for Assessment: The Five Candidate Earth Explorer Core Missions", coord. by N. Floury and J. Fuchs, ESA Spec. Publ. SP-1257(3), 98p., ESA Publ. Division, Noordwijk, Netherlands, 2001. [pdf(~1.9MB); req. print]

Engeln, A.v., S. Buehler, G. Kirchengast, and K. Kuenzi, Temperature profile retrieval from surface to mesopause by combining GNSS radio occultation and passive microwave limb sounder data, Geophys. Res. Lett., 28, 775–778, 2001. [pdf(844kB); req. print]

Foelsche, U., and G. Kirchengast, An new "geometric" mapping function for the hydrostatic delay at GPS frequencies, Phys. Chem. Earth (A), 26, 153–157, 2001. [pdf(861kB); req. print]

Foelsche, U., and G. Kirchengast, Tropospheric water vapor imaging by combination of ground-based and spaceborne GNSS sounding data, J. Geophys. Res., 106, 27,221-27,231, 2001. [pdf(~3.5MB); req. print]

Foelsche, U., G. Kirchengast, A.K. Steiner, L. Kornblueh, E. Manzini und L. Bengtsson, Klimawandel-Monitoring mit satellitengetragenen GNSS Okkultationssensoren, Proc. CD-Rom DACH (deutsch-österr.-schweiz.) Meteorologentagung 2001, Sept. 2001, Vienna, Austria, 19p., 2001. [pdf(861kB); req. print]

Lerner, J.A., E. Weisz, and G. Kirchengast, Retrieval of water vapor from IASI measurements: Methodology and case study application, Proc. 11th Int'l ATOVS Study Conf., Sept. 2000, Budapest, Hungary, 215–225, 2001. [req. print]

Ramsauer, J., and G. Kirchengast, Sensitivity of atmospheric profiles retrieved from GNSS radio occultation data to instrumental errors, Techn. Report for ESA/ESTEC No. 6/2001, 62p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2001. [pdf(~3.8MB); req. print]

Rieder, M.J., and G. Kirchengast, Error analysis for mesospheric temperature profiling by absorptive occultation sensors, Ann. Geophys., 19, 71-81, 2001. [pdf(241kB); req. print]

Rieder, M.J., and G. Kirchengast, Error analysis and characterization of atmospheric profiles retrieved from GNSS occultation data, J. Geophys. Res., 106, 31,755–31,770, 2001. [pdf(~3MB); req. print]

Steiner, A.K., G. Kirchengast, U. Foelsche, L. Kornblueh, E. Manzini, and L. Bengtsson, GNSS occultation sounding for climate monitoring, Phys. Chem. Earth (A), 26, 113-124, 2001. [pdf(~1.6MB), (text-identical version with better figure quality (pdf)); req. print]

Weisz, E., Temperature profiling by the Infrared Atmospheric Sounding Interferometer (IASI): Advanced retrieval algorithm and performance analysis (Ph.D. thesis), Wissenschaftl. Ber. No. 11, 174p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2001. [pdf(~4MB); req. print]

Weisz, E., J.A. Lerner, and G. Kirchengast, Estimation of atmospheric temperature and humidity profiles using IASI measurements, in IRS 2000: Current Problems in Atmospheric Radiation, W. L. Smith and Yu. M. Timofeyev (Eds.). A. Deepak Publishing, Hampton, Virginia, 89–92, 2001. [req. print]

Engeln, A.v., S. Buehler, G. Kirchengast, and K. Kuenzi, Temperature profile retrieval from surface to mesopause by combining GNSS radio occultation and passive MW limb sounder data, Proc. 10th Conf. on Satellite Meteorology and Oceanography, Amer.Met.Soc. Annual Meeting 2000, Long Beach/CA, U.S.A., 240-243, 2000. [req. print]

Hartmann, G.K., G. Kirchengast, A. von Engeln, M.L. Richards, J. Ramsauer, and Ch. Jarchow, MAS-GRAS sensor combination and optimal estimation retrieval of temperature and H2O profiles, Phys. Chem. Earth (A), 25, 625-628, 2000. [pdf(482kB); req. print]

Kirchengast, G., Atmospheric Physics, Atmospheric Remote Sensing, and Climate System Research: A Review on 10 Years Gone and an Outlook, in "Festschrift zum 70. Geburtstag von em.Univ.Prof. Dr. S.J. Bauer", edited by R. Leitinger and H.O. Rucker, pp.45-74, Publ. by Inst. for Geophys., Astrophys., and Meteorol./Univ. of Graz, and Inst. for Space Research/Austrian Acad. of Sciences, Austria, 2000. [pdf(~1.1MB); req. print]

Kirchengast, G., A.K. Steiner, U. Foelsche, L. Kornblueh, E. Manzini, and L. Bengtsson, Spaceborne climate change monitoring by GNSS occultation sensors, Proc. 11th Symp. on Global Change Studies, Amer.Met.Soc. Annual Meeting 2000, Long Beach/CA, U.S.A., 62-65, 2000. [pdf(283kB);req. print]

Kornblueh, L., L. Bengtsson, G. Kirchengast, X.-Y. Huang, P. Hoeg, and G.B. Larsen, Impact of an Atmospheric Profiling Mission on Numerical Weather Prediction, ESA Study Report (ESA Contract No. 12954/98/NL/GD),110p., Earth Sciences Division, ESA/ESTEC, Noordwijk, Netherlands, 2000. [pdf-sum(235kB), pdf-full(~38.4MB); req. print]

Lerner, J.A., E. Weisz, and G. Kirchengast, Optimal estimation of temperature profiles using a subset of IASI channels, Proc. 10th Conf. on Satellite Meteorology and Oceanography, Amer.Met.Soc. Annual Meeting 2000, Long Beach/CA, U.S.A., 216-217, 2000. [req. print]

Ramsauer, J., and G. Kirchengast, End-to-end GNSS Occultation Performance Simulator Version 3 (EGOPS3) Software User Manual (SUM), Techn. Rep. for ESA/ESTEC No. 1/2000, 467p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2000. [req. print]

Rehrl, C., Mesospheric temperature and ozone sounding based on solar occultation data, M.Sc. thesis, 124p., Inst. for Geophys., Astrophys., and Meteorol., Univ. of Graz, Austria, 2000. [req. print]

Rieder, M.J., and G. Kirchengast, An inversion algorithm for nonlinear retrieval problems extending Bayesian optimal estimation, Radio Sci., 35, 45-56, 2000. [pdf(~2.9MB); req. print]

Steiner, A.K., and G. Kirchengast, Gravity wave spectra from GPS/MET occultation observations, J. Atmos. Oceanic Technology, 17, 495-503, 2000. [pdf(257kB); req. print]

Engeln, A.v., G. Kirchengast, and J. Ramsauer, Accuracy of temperature and water vapor profiles derived from MAS and GRAS data by optimal estimation, Techn. Rep. MPAE-MASGRAS No. 1/1999, 37p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1999. [req. print]

Fischer, A., Variational analysis of meteorological profiling data, M.Sc. thesis, 93p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1999. [req. print]

Foelsche, U., Tropospheric water vapor imaging by combination of ground-based and spaceborne GNSS sounding data (Ph.D. thesis), Wissenschaftl. Ber. No. 10, 164p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1999. [pdf(~10.4MB); req. print]

Kirchengast, G., A simple analytical atmospheric model for radio occultation applications, Techn. Rep. for ESA/ESTEC No. 9/1999, 9p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1999. [pdf(193kB); req. print]

Kirchengast, G., Impact of an Atmospheric Profiling Mission on NWP: Definition of S/W Setup for the Observables Simulations, Techn. Note ESA-APNWP No. 1/1999, 5p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1999. [req. print]

Kirchengast, G., and J. Ramsauer, Impact of an Atmospheric Profiling Mission on NWP: Assessment of Mission Scenarios and Definition of OSSE Study Test Missions, Techn. Rep. for ESA/ESTEC No. 3/1999, 16p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1999. [pdf(613kB); req. print]

Kirchengast, G., J. Hafner, and W. Poetzi, The CIRA86aQ_UoG model: An extension of the CIRA-86 monthly tables including humidity tables and a Fortran95 global moist air climatology model, Techn. Rep. for ESA/ESTEC No. 8/1999, 18p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1999. [pdf(677kB); req. print]

Ramsauer, J., and G. Kirchengast, Impact of an Atmospheric Profiling Mission on NWP: Review of Sampling Requirements and Mission Scenario Study, Techn. Rep. for ESA/ESTEC No. 1/1999, 70p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1999. [pdf(~7.8MB); req. print]

Rieder, M.J., and G. Kirchengast, Physical-statistical retrieval of water vapor profiles using SSM/T-2 sounder data, Geophys. Res. Lett., 26, 1397-1400, 1999. [pdf(~1.3MB); req. print]

Rieder, M.J., and G. Kirchengast, Water vapor profiling with SSM/T-2 data employing a hybrid inversion algorithm, Proc. of the 10th Int'l ATOVS Study Conf. (eds. J. LeMarshall and J.D. Jasper), Boulder/CO, U.S.A., 449-462, 1999. [req. print]

Silvestrin, P., M. Gorbunov, G. Kirchengast, and L. Kornblueh, Probing the atmosphere with GNSS signals: Applications to meteorology and climatology, Proc. of GNSS'99/3rd Europ. Symp. on GNSS, Part 1, Genova, Italy, 217-223, 1999. [req. print]

Steiner, A.K., G. Kirchengast, and H.-P. Ladreiter, Inversion, error analysis, and validation of GPS/MET occultation data, Ann. Geophys., 17, 122-138, 1999. [pdf(454kB); req. print]

Hiebler, S.D., IASI - New aspects in infrared atmospheric sounding, M.Sc. thesis, 57p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1998. [req. print]

Kirchengast, G., End-to-end GNSS Occultation Performance Simulator overview and exemplary applications, Wissenschaftl. Ber. No. 2/1998, 138p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1998. [req. print]

Kirchengast, G., Check of the POD performance requirements for a MAS-GRAS sensor on ISS-Alpha, Techn. Note MPAE-MASGRAS No. 1/1998, 12p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1998. [req. print]

Kirchengast, G., and J. Ramsauer, Accuracy of temperature and water vapor profiles from GRAS and from combined MAS and GRAS profiles, Techn. Rep. MPAE-MASGRAS No. 1/1998, 20p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1998. [req. print]

Kirchengast, G., M. Gorbunov, N. Jakowski, L. Kornblueh, U. Mallow, A. Rius, C. Rocken, M. Rothacher, G. Schmidtke, M. Sust, J. Ward, and A. Wernik, ACLISCOPE - Atmosphere and Climate Sensors Constellation Performance Explorer (ESA Earth Explorer Opportunity Mission proposal), Wissenschaftl. Ber. No. 4/1998, 60p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1998. [req. print]

Rieder, M.J., Advanced physical-statistical retrieval of humidity and temperature profiles from spaceborne downlooking microwave sounder data (Ph.D. thesis), Wissenschaftl. Ber. No. 1/'98, 146p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1998. [req. print]

Rieder, M.J., and G. Kirchengast, Water vapor profiling with SSM/T-2 data employing an extended optimal estimation approach, Proc. of SPIE (MW Remote Sensing of the Atmosphere and Environment, Beijing/China, ed.: T. Hayasaka et al.), Vol. 3503, 153-164, 1998. [req. print]

Rieder, M.J., and G. Kirchengast, A hybrid inversion algorithm for nonlinear retrieval problems and its use for water vapor profiling based on microwave sounder data, Proc. of SPIE (MW Remote Sensing of the Atmosphere and Environment, Beijing/China, ed.: T. Hayasaka et al.), Vol. 3503, 433-444, 1998. [req. print]

Steiner, A.K., High resolution sounding of key climate variables using the radio occultation technique (Ph.D. thesis), Wissenschaftl. Ber. No. 3/'98, 170p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1998. [req. print]

Weisz, E., Kalman-Filter analysis of meteorological profiling data, M.Sc. thesis, 87p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1998. [req. print]

Hocke, K., Inversion of GPS meteorology data, Ann. Geophys., 15, 443-450, 1997. [req. print]

Hocke, K., G. Kirchengast, and A.K. Steiner, Ionospheric correction and inversion of GNSS occultation data: Problems and solutions, Techn. Rep. for ESA/ESTEC No. 2/'97, 35p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1997. [req. print]

Foelsche, U., and G. Kirchengast, Space-Time resolution conditions for atmospheric imaging involving GNSS occultation: A quantitative study, Techn. Rep. for ESA/ESTEC No. 3/'97, 33p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1997. [req. print]

Leitinger, R., and G. Kirchengast, Inversion of the plasma signal in GNSS occultations - simulation studies and sample results, Acta Geod. Geophy. Hung., 32, 379-394, 1997. [req. print]

Leitinger, R., and G. Kirchengast, Easy to use global and regional models - a report on approaches used in Graz, Acta Geod. Geophy. Hung., 32, 329–342, 1997. [req. print]

Leitinger, R., H.-P. Ladreiter, and G. Kirchengast, Ionosphere tomography with data from satellite reception of GNSS signals and ground reception of NNSS signals, Radio Sci., 32, 1657-1669, 1997. [req. print]

Leitinger, R., H.-P. Ladreiter, and G. Kirchengast, Ionosphere Tomography combining data from spaceborne GNSS and ground-based NNSS reception, Techn. Rep. for ESA/ESTEC No. 1/'97, 25p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1997. [req. print]

Leitinger, R., H.-P. Ladreiter, and G. Kirchengast, Ionosphere Tomography involving real spaceborne GNSS (GPS/Met) and ground-based NNSS data, Techn. Rep. for ESA/ESTEC No. 4/'97, 15p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1997. [req. print]

Kirchengast, G., End-to-end GNSS Occultation Performance Simulator functionality definition, Techn. Rep. for ESA/ESTEC No. 1/'96, 25p., Inst. Meteorol. Geophys., Univ. of Graz, Austria, 1996. [req. print]

Kirchengast, G., und H.-P. Ladreiter, Das Potential der Radio-Okkultationstechnik basierend auf GPS/GLONASS-Signalen zur Bestimmung fundamentaler atmosphärischer Parameter, Kleinheubacher Ber., 39, 677-686, 1996. [req. print]

Bengtsson, L., J.R. Eyre, G. Kirchengast, A. Hauchecorne, P. Silvestrin, and P. Ingmann, Atmospheric Profiling Mission - a candidate Earth Explorer mission (report for assessment), ESA Spec. Publ. SP-1196(7), 58p., ESA/ESTEC, Noordwijk, The Netherlands, 1996. [req. print]

Ladreiter, H.-P., and G. Kirchengast, GPS/GLONASS sensing of the neutral atmosphere: Model independent correction of ionospheric influences, Radio Sci., 31, 877-891, 1996. [req. print]

Leitinger, R., G. Kirchengast, and H.-P. Ladreiter, Ionosphere Tomography with GPS/MET and NNSS, Proc. Ionospheric Effects Symposium 1996 (ed.: J.M. Goodman), Alexandria/VA, U.S.A., (2A-4)1-8, 1996. [req. print]

Leitinger, R., J.E. Titheridge, G. Kirchengast, und W. Rothleitner, Ein ``einfaches'' globales empirisches Modell für die F-Schicht der Ionosphäre (Engl. transl. ``A `simple' global empirical model for the F layer of the ionosphere'' available at Inst. Met. Geophys., Univ. of Graz, Austria), Kleinheubacher Ber., 39, 697-704, 1996. [req. print]

Hoeg, P., A. Hauchecorne, G. Kirchengast, S. Syndergaard, B. Belloul, R. Leitinger, and W. Rothleitner, Derivation of atmospheric properties using a radio-occultation technique, ESA Contract Report (ESTEC/C.No.11024/94/NL/CN), 208p., Danish Met. Institute, Copenhagen, Denmark, 1995. [req. print]