US ARMY 97.2 - Osd.mil
A03-101 Low Probability of Intercept/Low Probability of Detection (LPI/LPD) and
Radio Frequency Interference (RFI) Mitigation Techniques ...... The number of
spectral bands should exceed 63, the spectral resolution should exceed one
tenth of a micron, the broad spectral region should be approximately 8 to 25
microns, ...