Atmosphere and Climate: Studies by Occultation Methods by J. Wickert, T. Schmidt, G. Beyerle, G. Michalak, R. König,

By J. Wickert, T. Schmidt, G. Beyerle, G. Michalak, R. König, S. Heise, C. Reigber (auth.), Dr. Ulrich Foelsche, Prof. Gottfried Kirchengast, Dr. Andrea Steiner (eds.)

Since the early use of the occultation dimension precept for sounding pla- tary atmospheres and ionospheres, its exploitation in atmospheric distant sensing has visible super advances. during this booklet we specialise in sensors on Low Earth Orbit (LEO) satellites, which take advantage of sun, lunar, stellar, GNSS (Global Navi- tion satellite tv for pc Systems), and LEO-crosslink indications for staring at the Earth's - mosphere and weather. The equipment all proportion the most important homes of self-calibration, excessive accuracy and vertical solution, worldwide assurance, and (if utilizing radio indications) all-weather ca- bility. The atmospheric parameters received expand from the basic va- ables temperature, density, strain and water vapor through hint gases, aerosols and cloud liquid water to ionospheric electron density. Occultation information are for this reason of excessive price in a variety of fields together with weather tracking and study, atmospheric physics and chemistry, operational meteorology, and ionospheric physics. nd the two foreign Workshop on Occultations for Probing surroundings and weather – OPAC-2 – was once held September 13–17, 2004, in Graz, Austria. OPAC-2 geared toward offering an off-the-cuff discussion board and stimulating surroundings fertilizing clinical discourse, co-operation projects, and mutual studying and help among participants of all diverse occultation groups. The workshop was once attended by means of forty members from 12 diversified international locations who actively contributed to a systematic programme of top quality and to a very good workshop surroundings, which was once judged by means of the members to have absolutely met the goals expressed.

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Finally, the subtraction of the ECMWF error from the combined error allowed an estimation of the global observation error. 4 % at 5–25 km globally. Wavelike structures apparent in SH winter at high latitudes are an indication that the ECMWF fields do not accurately represent the polar vortex (Gobiet et al. 2005). The smallest bias occurs at NH high latitudes in JJA. 7–1 % at 5–25 km height showing larger values in winter than in summer in the upper stratosphere at mid- and high latitudes. 75 % at 8– 30 km.

1029/2004JD005117 Gobiet A, Foelsche U, Steiner AK, Borsche M, Kirchengast G, Wickert J (2005) Climatological validation of stratospheric temperatures in ECMWF operational analyses with CHAMP radio occultation data. 1029/2004GL020806 Hollingsworth A, Lönnberg P (1986) The statistical structure of short range forecast errors as determined from radiosonde data. Part I: The wind field. Tellus 38A:111–136 Kuo Y-H, Sokolovskiy SV, Anthes RA, Vandenberghe F (2000) Assimilation of GPS radio occultation data for numerical weather prediction.

1029/2002JD003216 Beyerle G, Gorbunov ME, Ao CO (2003) Simulation studies of GPS radio occultation measurements. 1029/2002RS002800 Gorbunov ME, Lauritsen KB (2004) Analysis of wave fields by Fourier integral operators and their application for radio occultations. 1029/2003RS002971 Hajj GA, Kursinski ER, Romans LJ, Bertiger WI, Leroy SS (2002) A technical description of atmospheric sounding by GPS occultation. J Atmos SolarTerr Phys 64(4):451–469 Hajj GA, Ao CO, Iijima BA, Kuang D, Kursinski ER, Mannucci AJ, Meehan TK, Romans LJ, de la Torre Juarez M, Yunck TP (2004) CHAMP and SAC-C atmospheric occultation results and intercomparisons.

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