Day 5 (Monday 4 August 2014) and Open Session

Day 5 of the OSTIV Congress began with a presentation by Zafer ASLAN (Istanbul Aydın University). Zafer discussed the results of Comparison of three model outputs for now casting in a convective boundary layer. This presentation was on a cooperative paper prepared by N. Şen, A.C. Moral, B. Efe, A. Lauber, O. Mertol, Z. Aslan; Istanbul Technical University Istanbul, Turkey; Karlsruhe Institute of Technology, Karlsruhe, Germany. In this study, the accuracy of three models and outputs of programs (meteograms from PC-MET, HEZARFEN and CLASS Model) were investigated for two locations in Turkey (Istanbul and Eskişehir). Validation of model results for prediction of soaring conditions for the CBL were presented in this paper.

The second presentation with the title of “A free, on-line soaring weather forecasting system for world-wide use” was given by Edward HINDMAN (The City College of New York, USA. Edward pointed out some details on forecasts of the weather elements important to planning a soaring flight (for example, depth of thermals, winds). The system has been used successfully to produce soaring forecasts for national competitions on the east coast and desert southwest of the USA as well as mountain wave forecasts. Examples of the forecasts and their validations were presented. Use of the system and its validation is encouraged for other locations in the soaring world.

The presentation after the coffee brake was given by Rick Millane from University of Canterbury, New Zealand. It was a co-operative paper on “Analysis of mountain wave 3D wind-fields in the Andes derived from high-altitude sailplane flights” and, prepared by N. Zan, E. Enevoldson and J. Murray, (University of Canterbury, New Zealand and NASA Dryden Flight Research Center, California, USA). R. Millane described methods for determining wind velocities from logged sailplane flight data that are suitable for slowly varying wind fields such as occur in mountain waves. He discussed results from the application of these methods to data from two high-altitude Perlan Project sailplane flights in the lee of the Andes. The results were discussed in terms of lee-wave wavelength and location, in relation to other observational data including reanalysis wind speed and temperature calculations, Scorer parameter, and visual satellite pictures of cloud cover.

The last presentation of the day was related with “Analysis of the wind persistence in Southwest Anatolia in terms of paragliding” and presented by Atamtürk ÇAKIN (Istanbul Technical University). This paper was about a co-operative study together with İ. Ceyhan, C. Temiz, V. Yavuz, K. Koçak, and C. Kahya from Istanbul Technical University. This paper was on wind persistence methods; a measure of continuity of the wind at any time and place. Authors applied these methods to the wind speed data collected from Antalya, Kaş (Antalya), Isparta, Denizli and İzmir. In this study the wind analysis were calculated using two different persistence methods namely Conditional Probability Approach (CPA) and Speed Duration Curves with Threshold (SDCWT) and as a result of this study needful information were obtained for those interested in sport aviation.

Open Session

In the evening René Heise, Director of the Mountain Wave Project, spoke about the Himalaya Research Expedition. He gave an exciting overview about the challenges, objectives and first scientific results of this outstanding airborne measurement campaign in Nepal.

More information: MWP-website