I am hoping to expand my (biology-focused) research to include satellite data. For this, I'd need satellite imaging that includes multiple values in the visible spectrum (specifically, above 490nm) and extends slightly into the infrared (710nm). I have tried MERIS and Hyperion, but the resolution was insufficient (my area of interest is a lake ~300m x 55m). I've had a brief look at Worldview 2/3, but the spectral bands seem too wide.
Does anything like this exist, and is it freely available for research use?