I believe, this is only the way to produce both high spectral resolution and high spatial resolution hyperspectral data. Or is there a better way with similar p

I believe, this is only the way to produce both high spectral resolution and high spatial resolution hyperspectral data. Or is there a better way with similar performance? On the other hand recording takes relatively long, 1000 image lines (with spectra) at 20 lines per second will take 50s. Or will it record faster?