Absolute spectrophotometry will be achieved with Fourier Transform Spectrometer modules covering the full 10-2000 GHz frequency range.
Filterbank spectrometers on chip...
Broad band multichroic TES detectors, such as envisioned in the context of the PICO space mission (above), are one of the options considered for the multi-channel polarimetric imager. The PICO focal plane implements 21 photometric bands covering the 20-800 GHz frequency range.
Arrays of polarised Kinetic Inductance Detectors (KIDs) are an alternative to TES for broad-band polarimetric imaging.