Primary, specific conclusions
The DANTE radiation temperature tends to be higher than the
witness plate’s,
especially when the pointing is small. (i.e. the beams are relatively near the LEH.) This difference can be big (~15eV).
The main exception is with low albedo and deep pointing. Then the witness plate radiation temperature can
actually be somewhat higher than DANTE’s.
The witness plate incident spectrum is always harder than the
DANTE spectrum.
The LEH lip makes both temperatures higher, but the
DANTE temperature gains more than the witness plate temperature (typically 10 eV
vs 5 eV).
Witness plate albedo has little effect on the overall results (~1 eV).