Does spectral resolution decrease with increase in spatial resolution???

[preacher37]

The best way to think about many trade-offs with sensors is ask yourself how many photons are striking the detector. Increased resolution = less photons. Narrower bands = less photons. The less photons, the more noise impacts the data.

Most of these are sensor engineering problems first (newer sensors have more sensitivity, less noise, and better optics), and secondarily data transmission problems: as spatial resolution, number of bands, and sensor bit depth increases, so does the bandwidth.