Anybody have luck hearing these? I've been pointing my 70cm satellite array in various directions during the day to try and hear weather balloons (~403MHz) and I haven't heard anything. From what I understand, there are hundreds launched every day (7am and 7pm from sites across the country). I know the signal will be low, but I've got no problem picking up 250mW from SO-50 so if I have line of sight I should get a good signal. Any tips?