 Sometimes you'll try a certain method of analysis with some data you've collected and it's inappropriate for the data and then you have to think well because we were going out on the short grass prairie of Colorado with a hyper spectral instrument which measures the reflectance of light in very narrow spectral intervals and then we would sample the vegetation for chlorophyll or the biological mass or how much vegetation was there and then try to analyze the data and the method which other people were using was inappropriate and we were getting very ambiguous results and then just by sort of trying different things and being fairly exhaustive and trying different techniques I was able then to bring some order to things and understand what worked and what didn't and why it didn't work and this was very instructive because then we were able to use that tool to do more things and then constructed a very simple handheld instrument to sort of go out and very quickly measure things all over the place to add a lot more a rigor to what we were doing because we could sample more areas and then again the light bulb went off maybe there's something to this and maybe we could actually do this from airplanes or from satellites and use these same simple techniques over very large areas and then when we tried them with satellite data and it worked that was a very instructive and very inspiring