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PMOD/WRC Publications:   1996 - 2000

Each publication has a reference number, which is part of a continuous numbering scheme of PMOD/WRC publications. Please contact the PMOD/WRC office to obtain any of these publications: (Staff of PMOD/WRC)

769   J. Romero, Ch. Wehrli, C. Fröhlich: Maintenance of the World Radiometric Reference, IPC VIII, 188, 49-51, 1996

770   C. Fröhlich, C. A. Crommelynck, Ch. Wehrli, M. Anklin, S. Dewitte, A. Fichot, W. Finsterle, A. Jiménez, A. Chevalier, H. Roth: In-Flight Performance of the Virgo Solar Irradiance Instruments on SOHO, Solar Physics, 175, 267-286, 1997

771   T. Appourchaux, T. Sekii, D.O. Gough, U. Lee., Ch. Wehrli: Structure Inversions with the VIRGO Data, in: Sounding Solar and Stellar Interiors, eds: Provost, J., Schmider, F.X., IAU Symposium No. 181,  Kluwer Academic Publ., Dordrecht, The Netherlands, S. 159 - 166, 1997

772   Fröhlich, C., 1997, Total Solar Irradiance Monitoring Programs, Solar Physics, 177, 391-400, Kluwer Academic Publishers Dordrecht, Boston, London

773   C. Fröhlich, B. Andersen, T. Appourchaux, G. Berthomieu, D.A. Crommelynck, V. Domingo,  A. Fichot, W. Finsterle, M.F. Gómez, D.O. Gough, A. Jiménez, T. Leifsen, M. Lombaerts, J.M. Pap, J. Provost, T. Roca~Cortés, J. Romero, H. Roth, T. Sekii, U. Telljohann, T. Toutain, Ch. Wehrli: First
Results from VIRGO, the Experiment for Helioseismology and Solar Irradiance Monitoring on SOHO, Sol. Phys., 170, 1-25, 1997

774   C. Fröhlich, B.N. Andersen, T. Appourchaux, G. Berthomieu, D.A. Crommelynck, V. Domingo, A. Fichot, W. Finsterle, M.F. Gómez, D. Gough, A. Jiménez, T. Leifsen, M. Lombaerts, J.M. Pap, J. Provost, T. Roca Cortés, J. Romero, H. Roth, T.  Sekii, U. Telljohann, T. Toutain, Ch. Wehrli:
First Results from VIRGO on SOHO, in: Sounding Solar and Stellar Interiors, eds: Provost, J., Schmider, F.X., IAU Symposium No. 181,  Kluwer Academic Publ., Dordrecht, The Netherlands, S. 67 - 82, 1997

775   B.N. Andersen, T. Appourchaux, D. Crommelynck, C. Fröhlich, A. Jiménez, M.C. Raballo Soares, Ch. Wehrli: Properties of the Solar Background Signal from VIRGO, in: Sounding Solar and Stellar Interiors, eds: Provost, J., Schmider, F.X., IAU Symposium No. 181, Observatoire de la Cote d'Azur, Nice, S. 151 - 158, 1997

776   T. Leifsen, B.N. Andersen, T. Appourchaux, C. Fröhlich, A. Jiménez, T. Toutain, Ch. Wehrli: Temporal Behaviour of P-modes from VIRGO, in: Sounding Solar and Stellar Interiors, eds: J.Provost, F.X. Schmider, Observatoire de la Cote d'Azur, Nice, 1997

777   R. Philipona, Ch. Marty, C.Fröhlich, A. Heimo: Measurements of the Longwave Radiation Budget in the Alps, in: IRS96: Current Problems in Atmospheric Radiation, Smith and Stammnes, ed., A. DEEPAK Publishing, Hampton, 1997, in press

778   R. Philipona, A. Heimo, C. Fröhlich, A. Ohmura, Ch. Wehrli: The Swiss atmospheric Radiation Monitoring Program: CHARM, in: IRS96: Current Problems in Atmospheric Radiation, Smith and Stammnes, ed., A. DEEPAK Publishing, Hampton, 1997, in press

779   A. Renaud, J. Staehelin, M. Blumthaler and R. Philipona: Influence of total ozone variation on UV (erythema) radiation. An analysis of direct Robertson-Berger measurements at Davos, Switzerland, in: Proceedings XVIII Quadriennial Ozone Symposium L'Aquila (1996), 1997, in press
 
780   Ch. Wehrli, T. Appourchaux, D. Crommelynck, W. Finsterle, C. Fröhlich, J.M. Pap:  Solar Irradiance Variations and Active Regions Observed by VIRGO Experiment on SOHO, in: Sounding Solar and Stellar Interiors, eds: Provost, J., Schmider, F.X., Observatoire de la Cote d'Azur, Nice, 1997

781   PMOD/WRC, Jahresbericht 1996

782   T. Toutain, T. Appourchaux, F. Baudin, C. Fröhlich, A. Gabriel, P. Scherrer, B.N. Andersen, R. Bogart, R. Bush, W. Finsterle,R.A. Garcia, G. Grec, C.J. Henney, T. Hoeksema, A. Jiménez, A. Kosovichev, T. Roca-Cortés, S. Turck-Chiéze, R. Ulrich and Ch. Wehrli:  Triphonic Helioseismology: Comparison of Solar P Modes Observed by the Helioseismology Instruments Aboard SOHO, Solar Physics 175, S. 311 - 328, 1997

783   C. Fröhlich, J. Lean: Total Solar Irradiance Variations: The Construction of a Composite and its Comparison with Models, in: F.L.Deubner, Ed., "New Eyes to see inside the Sun and Stars", Proceedings IAU Symposium 185, Kyoto, August 1997, Kluwer Academic Publ., Dordrecht, The Netherlands, 1997, in press

784   C. Fröhlich, J. Lean: Total Solar Irradiance Variations: The Construction of a Composite and its Comparison with Models, in: B.Fleck & A. Wilson Eds., “31. ESLAB Symposium: Correlated Phenomena at the Sun, in the Heliosphere and Geospace”, ESA-SP-415, Noordwijck, NL, 1998, in press

785   Ch. Wehrli, C. Fröhlich, M. Anklin, M. Fligge, S.K. Solanki, Y. Unruh: Wavelength Dependence of Solar Irradiance Variability from VIRGO onboard SOHO, in: B.Fleck & A. Wilson Eds., “31. ESLAB Symposium: Correlated Phenomena at the Sun, in the Heliosphere and Geospace”, ESA- SP-415, Noordwijck, NL,1998, in press

786   J.M. Pap, M. Turmon, S. Mukhtar, R. Bogart, R. Ulrich, C. Fröhlich, Ch. Wehrli: Automated Recognition and Characterization of Solar Active Regions based on the SOHO/MDI images, in: B.Fleck & A. Wilson Eds., “31. ESLAB Symposium: Correlated Phenomena at the Sun, in the Heliosphere and Geospace”, ESA-SP-415, Noordwijck, NL, 1998, in press

787   V. Domingo, L. Sánchez, T. Appourchaux, C. Fröhlich, Ch. Wehrli, T. Hoeksema, D. Crommelynck, J. Pap: On the Effect of Active Regions on the Solar Irradiance, in: B.Fleck & A. Wilson Eds., “31. ESLAB Symposium: Correlated Phenomena at the Sun, in the Heliosphere and Geospace”, ESA-SP-415, Noordwijck, NL, in press

788   M. Anklin, C. Fröhlich, W. Finsterle, D.A. Crommelynck, S. Dewitte: Assessment of Degradation of VIRGO Radiometers onboard SOHO, 31st ESLAB Symp., 'Correlated Phenomena at the Sun, in the Heliosphere and in Geospace', ESTEC, Noordwijk, The Netherlands, 459-462

789   M. Anklin, C. Fröhlich, W. Finsterle, D.A. Crommelynck, S. Dewitte: Assessment of Degradation of VIRGO Radiometers onboard SOHO, Metrologia, 1998, in press

790   C. Fröhlich, R. Philipona, Ch. Marty: Untersuchung des Oberflächenstrahlungshaushaltes in den Alpen und im Vergleich zum schweizerischen Mittelland, Schlussbericht NFP 31, vdf Hochschulverlag AG, ETH Zürich, 1998

791   A. Rennaud, J. Staehelin, R. Philipona, A. Heimo: The influence of a cloud cover on the erythemal UV radiation, for low and high surface albedos. An analysis of measurements at Davos, Switzerland. International summer school on tropospheric chemistry and space observation, Riom, 17. - 27. July, 1997

792  PMOD/WRC Jahresbericht 1997

793   R. Philipona, C. Fröhlich, K. Dehne, J. DeLuisi, J. Augustine, E. Dutton, D. Nelson, B. Forgan, P. Novotny, J. Hickey, S.P. Love, S. Bender, B. McArthur, A. Ohmura, J.H. Seymour, J.S. Foot, M. Shiobara, F.P.J. Valero and A.W. Strawa: The Baseline Surface Radiation Network Pyrgeometer Round-Robin Calibration Experiment, Journal of Atmospheric and Oceanic Technology, Vol. 15, No. 3, p. 687 - 696, 1998

794.   M. Fligge, S.K. Solanki, Y.C. Unruh, C. Fröhlich and Ch. Wehrli: A Model of Solar Total and Spectral Irradiance Variations, Astronomy and Astrophysics, 335, p. 709 - 718, 1998

795.   B. Schmid, P.R. Spyak, S.F. Biggar, Ch. Wehrli, J. Sekler, T. Ingold, Ch. Mätzler and N. Kämpfer: Evaluation of the Applicability of Solar and Lamp Radiometric Calibrations of a Precision Sun Photometer Operating Between 300 and 1025 nm, Applied Optics 37, No. 18, p. 3923 - 3941, 1998

796.   T. Toutain, T. Appourchaux, C. Fröhlich, A.G. Kosovichev, R. Nigam and P.H. Scherrer: Asymmetry and Frequencies of Low-Degree p-Modes and the Structure of the Sun's Core, The Astrophysical Journal 506, p. L147 - L150, 1998

797.   T. Toutain, T. Appourchaux, C. Fröhlich, A. Kosovichev, R. Nigam and P. Scherrer: Line Asymmetries of VIRGO and MDI Low-Degree p-Modes, in S. Korzenik and A. Wilson (eds.), SOHO 6/GONG Workshop, Structure and Dynamics of the Interior of the Sun and Sun-like Stars, ESA SP-418, ESA Publication Division, Noordwijk, The Netherlands, p. 973 ­ 978, 1998

798.   C. Fröhlich and J. Lean: Total Solar Irradiance: Present Knowledge and Future Needs. A crossroads for European Solar & Heliosperic Physics , Tenerife, March 23rd - 27th, 1998, ESA SP-417, p. 239 ­ 242, 1998

799.   C. Fröhlich and J. Lean: The Sun's Total Irradiance, Cycles, Trends and Related Climate Change Uncertainties since 1976, Geophysical Research Letters 25, No 23, p. 4377 - 4380, 1998

800.   C. Fröhlich: VIRGO on SOHO: Status and Future Prospects, in S. Korzenik and A. Wilson (eds), SOHO 6/GONG Workshop, Structure and Dynamics of the Interior of the Sun and Sun-like Stars, ESA SP-418, ESA Publications Division, Noordwijk, p. 7 ­ 10, The Netherlands, 1998

801.   M. Anklin, C. Fröhlich, W. Finsterle and Ch. Wehrli: Characterization of Solar Noise in Irradiance from VIRGO, in S. Korzenik and A. Wilson (eds), SOHO 6/GONG Workshop, Structure and Dynamics of the Interior of the Sun and Sun-like Stars, ESA SP-418, ESA Publications Division, Noordwijk, The Netherlands, p. 91 ­ 94, 1998

802.   C. Fröhlich, W. Finsterle, B. Andersen, T. Appourchaux, W.J. Chaplin, Y. Elsworth, D.O. Gough, J.T. Hoeksema, G.R. Isaak, A.G. Kosovichev, J. Provost, P.H. Scherrer, T. Sekii and T. Toutain: Observational Upper Limits for Low-Degree Solar g-Modes, in S. Korzenik and A. Wilson (eds), SOHO 6/GONG Workshop, Structure and Dynamics of the Interior of the Sun and Sun-like Stars, ESA SP-418, ESA Publ. Division, Noordwijk, NL, p. 67 ­ 71, 1998

803.   W. Finsterle and C. Fröhlich: Reduction of Noise in the Total Solar Irradiance, in S. Korzenik and A. Wilson (eds), SOHO 6/GONG Workshop, Structure and Dynamics of the Interior of the Sun and Sun-like Stars, ESA SP-418, ESA Publications Division, Noordwijk, The Netherlands, p. 167 ­ 170, 1998

804.   B. Andersen, M. Aarset, T. Leifsen, T. Appourchaux, C. Fröhlich, J. Hoeksema, A. Jiménez and T. Toutain: Statistical Properties of the Amplitude Modulation of Solar p Modes, in S. Korzenik and A. Wilson (eds), SOHO 6/GONG Workshop, Structure and Dynamics of the Interior of the Sun and Sun-Like Stars, ESA SP 418, ESA Publications Division, Noordwijk, The Netherlands, p. 897 ­ 900, 1998

805.   B. Andersen, T. Leifsen, T. Appourchaux, C. Fröhlich, J. Hoeksema and T. Toutain: The Effect of Amplitude Modulation on Asymmetries of Solar p-Modes, in S. Korzenik and A. Wilson (eds), SOHO 6/GONG Workshop, Structure and Dynamcis of the Interior of the Sun and Sun-Like Stars, ESA SP-418, ESA Publications Division, Noordwijk, The Netherlands, p. 893 ­ 896, 1998

806.   B. Andersen, T. Leifsen, T. Appourchaux, C. Fröhlich, A. Jiménez and Ch. Wehrli: Time Dependence of Solar Noise Observed with VIRGO, in S. Korzenik and A. Wilson (eds), SOHO 6/GONG Workshop, Structure and Dynamcis of the Interior of the Sun and Sun-Like Stars, ESA SP-418, ESA Publications Division, Noordwijk, The Netherlands, p. 83 ­ 86, 1998

807.   T. Appourchaux, B. Andersen, W. Chaplin, Y. Elsworth, W. Finsterle, C. Fröhlich, D. Gough, T. Hoeksema, G. Isaak, A. Kosovichev, J. Provost, P. Scherrer, T. Sekii and T. Toutain: Comparative Studies of Low-Order and Low-Degree Solar p-Modes, in S. Korzenik and A. Wilson (eds), SOHO 6/GONG Workshop, Structure and Dynamics of the Interior of the Sun and Sun-Like Stars, ESA SP-418, ESA Publications Division, Noordwijk, The Netherlands, p. 95 ­ 98, 1998

808.   T. Appourchaux and the VIRGO Team: Results from the Luminosity Oscillation Imager on board SOHO: Low-Degree p-Mode Parameters for a 2-Year Data Set, in S. Korzenik and A. Wilson (eds), SOHO 6/GONG Workshop, Structure and Dynamics of the Interior of the Sun and Sun-Like Stars, ESA SP-418, ESA Publication Division, Noordwijk, NL, p. 99 ­ 104, 1998

809.   A. Jiménez and the VIRGO, GOLF and MDI Teams: Phase and Gain Relations between Acoustic Modes Measured Aboard SOHO, in S. Korzenik and A. Wilson (eds), SOHO 6/GONG Workshop, Structure Dynamics of the Interior of the Sun and Sun-Like Stars, ESA SP-418, ESA Publications Division, Noordwijk, The Netherlands, p. 243 ­ 248, 1998

810.   J. Lean and C. Fröhlich, Solar Total Irradiance Variations, in K. Blasubramaniam, J. Harvey and D. Rabin (eds), Synoptic Solar Physics, ASP Conference Series, Vol. 140, p. 281 - 292, 1998

811.   A. Heimo, R. Philipona, C. Fröhlich, Ch. Marty and A. Ohmura: The Swiss Atmospheric Radiation Monitoring Network CHARM, TECO-98, Casablanca, Marocco, 13th -15th  May, Instruments and Observing Methods, No. 70, WMO/TD No. 877, p. 291 ­ 294, 1998

812.   A. Ohmura, E.G. Dutton, B. Forgan, C. Fröhlich, H. Gilgen, H. Hegner, A. Heimo, G. König-Langlo, B. McArthur, G. Müller, R. Philipona, R. Pinker, Ch. H. Whitlock, K. Dehne and M. Wild: Baseline Surface Radiation Network (BSRN/WCRP): New Precision Radiometry for Climate Research, Bulletin of the American Meteorological Society 79, No.10, p. 2115 - 2136, 1998

813  A. Renaud, J. Staehelin, C. Fröhlich, R. Philipona and A. Heimo: Influence of Snow and Clouds on Erythemal UV Radiation: Analysis of Swiss Measurements and Comparison with Models, Journal of Geophysical Research, 105, 4961-4969, (2000).

814.   J.E. Martin, N.P. Fox, N.J. Harrison, B. Shipp and M. Anklin: Determination and Comparisons of Aperture Areas using Geometric and Radiometric Techniques, Metrologia 35, 461 - 464, 1999

815.   Ch. Wehrli: World Optical Depth Research and Calibration Center, Global Atmosphere Watch (GAW), International activities and swiss contribution: ozone, radiation and aerosols in the atmosphere, BUWAL, SMA, 1999, in press

816.   J. Pap, M. Anklin, C. Fröhlich, Ch. Wehrli, F. Varadi and L. Floyd: Variations in Total Solar and Spectral Irradiance as Measured by the VIRGO Experiment on SOHO, Advances of Space Research, 1998, submitted

817.   W. Finsterle and M. Anklin: Level 1 Algorithm for the PMO6-V/VIRGO Radiometers, Internal Report PMOD/WRC, 1998

818.   M. Anklin and C. Fröhlich: Timing of PMO6 and SPM on VIRGO, Internal Report PMOD/WRC, 1998

819.   M. Anklin: Directional Response of Pyranometers, Internal Report PMOD/WRC ,1998

820.   C. Fröhlich: Die Sonne als treibende Kraft des Klimas, Neue Zürcher Zeitung, Nr. 250, p. 7, 1998

W 821.   G. Thuiller, C. Fröhlich and G. Schmidtke: Spectral and Total Solar Irradiance Measurements on Board the International Space Station, Proceedings of the 2nd European Symposium on the Utilisation of the International Space Station, ESA Publications Division, ESA SP 433, Noordwijk, The Netherlands, p. 605 ­ 611, 1999

822.   J.M. Pap and C. Fröhlich: Total solar irradiance variations, Journal of Atmospheric and Solar-Terrestrial Physics 61, Pergamon, p. 15 ­ 24, 1999

823.   M. Anklin: SIMBA 98 Report, Internal Report PMOD/WRC, 1999

824.   M. Anklin, Ch. Wehrli, C. Fröhlich and F. Pepe: Total solar and spectral irradiance measured in France during a stratospheric balloon flight, in B. Kaldeich (ed.), 14th ESA Symposium on European Rocket and Balloon Programmes and Related Research, ESA SP-437, ESA Publications Division, Noordwijk, The Netherlands, pp. 537--540., 1999

825.   Annual Report 1998 PMOD/WRC, 1999

826.   J. M. Pap and C. Fröhlich: Total solar irradiance variations, J. Atmos & Solar - Terrerst. Phys. 61 , 15 - 24, 1999

827.   J. M. Pap , M. Anklin, C. Fröhlich and Ch. Wehrli: Variations in total solar and spectral irradiance as measured by the VIRGO experiment on SOHO, Adv. Space Res. 24, 215 - 224, 1999

828.   T. Quinn and C. Fröhlich: Accurate radiometers should measure the output of the sun, Nature 401, 841, 1999

829.   W. Schmutz and W. D. Vacca: On WR stars as age indicators in star forming regions, In: I. Hubeny, S. Heap, R. Cornett (eds.), Workshop on Spectrophotometric Dating of Stars and Galaxies, ASP Conference Series Vol. 192, San Francisco, pp. 73  - 76, 1999

830.   S. K. Solanki, W. Finsterle and I. Rüedi : Expansion of solar magnetic flux tubes large and small, A & A 347, L27- L30, 1999

831.   M. Anklin, Ch. Wehrli and C. Fröhlich: Total solar and spectral irradiance measured in France during a stratospheric balloon flight, In B. Kaldeich (ed.), 14th ESA Symposium on European Rocket and Balloon Programmes and Related Research, ESA SP-437, ESA Publications Division, Noordwijk, pp. 537 - 540, 1999

832.   M. Anklin, Ch. Wehrli and C. Fröhlich: SIMBA98 Report, PMOD / WRC, Davos, 1999

833.   D. Schmucki and R. Philipona: Arosa Total Ozone measurements and UV Radiation in the Swiss Alps, In. Proceedings of the international Ozone Symposium, 200th Anniversary of Christian Schönbein the Discoverer of Ozone, Association, Paris, pp. 175 - 178, 1999

834.   S. K. Solanki, I. Rüedi and W. Finsterle: On the expansion of large of large and small flux tubes with height. In: K. N. Nagendra, J. O. Stenflo (eds.), Proceedings of the 2nd Solar Polarization Workshop. Solar Polarization, Kluwer Academic Publishers, Dordrecht, pp. 397 - 408, 1999

835.    G. Thuiller, C. Fröhlich and G. Schmidtke: Spectral and total solar irradiance measurements on board the international space station, In: Proceedings of the 2nd European Symposium on the Utilisation of the International Space Station, ESA Publications Division ESA Sp 433, Noordwijk, 605 - 611, 1999

836.     Ch. Wehrli: World Optical depth and research center, In Global Atmosphere Watch international activities and swiss contribution: Ozone, radiation and aerosol in the atmosphere, Swiss agency for the environment, forests and landscape, 1999

837.     Ch. Wehrli: Calibrations of Filter Radiometers for Determination of Atmospheric optical depth, NEWRAD99 (poster), 1999

838  R. Philipona : Alpine Surface Radiation Budget Project, Proceedings GAW-CH Conference, Zürich, 14-15 Oct., Swiss Agency for the Environment, Forest and Landscape (SAEFL), UM-110-E, 77-80, (1998).

839.   C. Fröhlich and the VIRGO Team: What do VIRGO Results tell about the solar interior and Atmosphere, Adv. Space Res. 24, 157 - 162, 1999

840.    G. Gräfener, W. Hamann and L. Koesterke, The impact of iron group elements on the ionization structure of WC star atmospheres: WR111. In: Thermal and Ionization Aspects of Flows from Hot Stars: Observation Series, San Francisco, 2000

841.    Jahresbericht PMOD/WRC 1999, 2000

842.     G. Gräfener, W. Hamann and L. Koesterke: Non - LTE models of WR winds., In: Thermal and Ionization Aspects of Flows from Hot Stars: Observation Series, San Francisco, 2000

843.   G. Gräfener, W. Hamann and L. Koesterke: The structure of iron - blanked WR atmospheres., Thermal and Ionization Aspects of Flows from Hot Stars: Observation Series, San Francisco, 2000

844.     P. A. Crowther, A. Pasquali, O. De Marco, W. Schmutz, D.J. Hillier and A. de Koter: Wolf-Rayed nebulae as tracers of stellar ionizing fluxes: I. M1-67, A&A 350, 1007 - 1017, 1999

845.   T. Dumm, W. Schmutz, H. Schild and H. Nussbaumer: Circumstellar matter around M-giants in Symbiotic binaries: SY Muscae and RW   Hydrae, A&A 349, 169 - 176, 1999

846    C. Fröhlich: Observations of irradiance variability, Space Science Reviews, 94, 15-24, 2000

847   T. Appourchaux, C. Fröhlich, B. Andersen, G. Berthomieu, W. Chaplin, Y. Elsworth, W. Finsterle, D. Gough, J. Hoeksema, G. Isaak, A. Kosovichev, J. Provost, P. Scherrer, T. Sekii and T. Toutain: Observational upper limits for low-l solar g modes, Astrophys. J., 538, 401-414, 2000

848   A. Brkovic, I. Rüedi, S.K. Solanki, A. Fludra, R.A. Harrison, M.C.E. Huber, J.O. Stenflo and K. Stucki: EUV brightness variations in the quiet Sun. 2000, A&A 353, 1083 --1093.

849   K. Stucki, S.K. Solanki, U. Schühle and I. Rüedi: 2000, On the relationship between line shift and intensity inside coronal holes. A&A 362, L49 -- L52.

850   A. Pauluhn, S.K. Solanki, I. Rüedi, E. Landi and Schühle: Statistics of quiet Sun extreme ultraviolet intensities. A&A 362, 737 -- 745. 2000

851   K. Stucki, S.K. Solanki, U. Schühle, I. Rüedi, K. Wilhelm, J.O. Stenflo, A. Brkovic and M.C.E. Huber: Comparison of far ultraviolet emission lines formed in coronal holes and the quiet Sun. 2000, A&A 363, 1145 --1154.

852   I. Rüedi, C. Fröhlich, W. Schmutz and Ch. Wehrli: Report on the International Pyrheliometer Comparisons - The Maintenance and Dissemination of the World Radiometric Reference IOM Report No. 74 (WMO/TD-No. 1028), p. 64 ­ 67, 2000.

853   A. Brkovic, S.K. Solanki and I. Rüedi: Comparison of blinkers observed with CDS and with SUMER in “Recent Insights into the Physics of the Sun and Heliosphere: Highlights from SOHO and other Space Missions”, P. Brekke, B. Fleck and J.B. Gurman (Eds.), Astron. Soc. Pacific Conf. Ser. Vol. 200, in press 

854   Ch. Wehrli: Calibrations of Filter Radiometers for Determination of Atmospheric Optical Depth, Metrologia 37, 419 ­ 422, 2000

855   A. Pauluhn, S.K. Solanki, I. Rüedi, E. Landi and U. Schühle: Statistical features of the Quiet Sun in EUV. In ”Recent Insights into the Physics of the Sun and Heliosphere - Highlights from SOHO and Other Space Missions”, P. Brekke, B. Fleck and J.B. Gurman (Eds.), Astron. Soc. Pacific Conf. Ser. Vol. 200, in press

856   A. Pauluhn, S.K. Solanki, U. Schühle, K. Wilhelm, J. Lang, W.T. Thompson, I. Rüedi, J. Hollandt and M.C.E. Huber: Comparison of quiet Sun radiances measured by CDS and SUMER on SOHO in “The 3-D Heliosph. at Solar Maximum”, in press

857   L. Damé, D. Cugnet, D. Hersé, D. Crommelynck, S. Dewitte, A. Joukoff, I. Rüedi, W. Schmutz, Ch. Wehrli, C. Delmas, F. Laclare and J.-P. Rozelot: PICARD: Solar Diameter, Irradiance and Climate in SOLSPA, in press

858   Ch. Marty and R. Philipona: The Clear-Sky Index to separate Clear-Sky from Cloudy-Sky Situations in Climate Research, Geophysical Research Letters, 27, No. 17, 2649-2652, (2000).

859   R. Philipona and A. Ohmura: Absolute Calibration of pyrgeometers: A proposal for a world radiometric reference for longwave irradiance measurements, WMO Technical conference on meteorological and environmental instruments and methods of observation (TECO-2000), Beijing, China, 23-27 Oct., pp 108-111, (2000).

860   J. Gröbner, A. Albold, M. Blumthaler, T. Cabot, A. De la Casiniere, J. Lenoble, T. Martin, D. Masserot, M. Müller, R. Philipona, T. Pichler, G. Rengarajan, D. Schmucki, G. Seckmeyer, C. Sergent and P. Weihs: The Variability of Spectral Solar Ultraviolet Irradiance in an Alpine Environment, Journal of Geophysical Research, 105, B22, 26991-27003, (2000).

861   J. Gröbner, M. Blumthaler, A. De-la-Casiniere, J. Lenoble, R. Philipona, G. Seckmeyer and P. Weihs: Solar UV Irradiance Variability characterized by simultaneous Spectrometry, In Proceedings of the Quadrennial Ozone Symposium, Sapporo, Japan, (2000).

862   W. Finsterle: Helioseismology with VIRGO Data: The Search for Solar G Modes, PhD thesis #13422, ETH Zörich, 2000
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