On 26/09/2013 01:10, Scott Penrose wrote: > Begin forwarded message: > >> *From: *steve jennings <skjjenni...@gmail.com
>> I have been using xcsoar for a year and I am very grateful for the >> amasing work you have done.Xcsoar has made me much more efficient at >> flying in thermals.I was wondering how difficult it would be to write >> a program that would use existing formulas to predict the locations >> and heights of the different waves within one system.Maybe there could >> be a visual indicator that would show us where we are within the wave >> system. For example the program could show us the time left to the >> next wave, warn us if we are too low, or if there are any obstacles >> etc. .I have no idea how much work is involved since I have no >> knowledge of programming. I understand that this is a none lucrative >> endeavor which makes me even more appreciative of your hard work. They >> say you can't teach and old dog new tricks , well you have. I would >> like to thank you in advance for everything. I have a similar interest. Some of the things I have been thinking about: 1) The facility to setup a wave/ridge flying page on XCSoar with: - Wind drift on trail switched off - Fixed zoom at high level Then you can build up a picture of the wave system you are flying in and find the lift again when you need it. The idea is to setup a page that you can swipe to when you encounter ridge/wave. I believe the required functions are in the pipeline with development version of XCSoar, I have not checked its current status recently. 2) Flarm radar is a useful tool if there are multiple gliders flying in the wave system - you can quickly locate others who have already located the lift. This is already available. 3) Then I would like to overlay on that RASP forecasts on XCSoar. Ideally it would be good to overlay "pressure level cross section" images. Like this historical one from an interesting wave forecast: http://users.zsd.co.za/~ian2/rasp/20130425/press500.curr.1400lst.w2.png XCSoar would ideally automatically display the most relevant available image, based on altitude and time of day. Note the images have to be prepared from a RASP forecast in advance. There is some work to be done on the RASP side too. There already exists a utility for extracting images for XCSoar from RASP forecasts and a facility for displaying them. But I don't think that utility processes "pressure level cross sections" as these are composite images with multiple parameters displayed (lift and wind barbs). I host the RASP forecasts for South West South Africa so I will look into the RASP side of things when I get a chance. Ian ------------------------------------------------------------------------------ October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register > http://pubads.g.doubleclick.net/gampad/clk?id=60133471&iu=/4140/ostg.clktrk _______________________________________________ Xcsoar-user mailing list Xcsoar-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xcsoar-user
