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Remote spectroscopic observations of the lunar surface is now complemented by in situ reflectance spectra obtained by the Chang’E 3 and Chang’E 4 missions. The material at landing site includes also a fragment of rock with a small- to medium grained plutonic texture. Current spectral databases primarily contain spectra measured on powder samples, while spectra of coarse-grained rock samples are rare. Rock samples returned from the Apollo missions indicate that lunar anorthosites are typically coarse grained and reach grain sizes larger than 1 cm. We present the extension of the current spectral databases by new spectral data of whole rock samples, crucial for the interpretation of current in situ/remote analyses for lunar and other planetary missions, as Hayabusa2 and OSIRIS-REx. Spectral data is recorded at the Planetary Spectroscopy Laboratory (PSL) of DLR in Berlin. The suite of samples selected for this work includes: - slabs and stone chunks of plagioclases such as anorthosite, diorite, monzodiorite, gabbro and diabas; - salts such as hexahydride; - iron meteorite samples, among them ataxites and octahedrites. Emissivity is measured in vacuum at 100° C, 200° C, 300° C and 400° C in the MIR and FIR spectral ranges. Thermally processed samples are measured in hemispherical and bi-directional reflectance in the full spectral range from UV to FIR. A sample of graphite (measured in emissivity under the same configuration and procedure as for the samples) is used to calibrate the sample emissivity.

Thermal emission and reflection spectral library of rocks for the interpretation of CHANG’E 4 and planetary mission data