Eagle/Hawk spectra over water have a "bump" at ~970nm

[benj]

Eagle and Hawk spectra over water both seem to have an unexplained "bump" at around 970nm (upper end of Eagle's range, lower end of Hawk's). Water IR reflectance shouldn't have this bump, should just be black.

For graph below, red and pink lines are Eagle and Hawk respectively from a Caligeo-processed level 1 file, green and blue lines are Eagle and Hawk respectively from an azspec-processed level 1 file (spikes in azspec SWIR are being dealt with in ticket #110). It can be seen that Eagle starts to rise slightly at ~960nm and Hawk is far too high until about 1140nm (if not higher - hard to tell)

[benj]

Azspec and caligeo output for Eagle and Hawk over water (8px average, Nigg Bay line 3, level 1 data)