Published November 12, 2021 | Version 2
Software Open

Data Assimilation of MASCOT Radiometer Data

Authors/Creators

  • 1. Institute of Mathematics, University of Potsdam, Potsdam, Germany, and Institute of Planetary Research, German Aerospace Center (DLR), Berlin, Germany
  • 2. Institute of Planetary Research, German Aerospace Center (DLR), Berlin, Germany
  • 3. Planetary Research and Exploration Center, Chiba Institute of Technology, Narashino, Japan
  • 4. Institute of Mathematics, University of Potsdam, Potsdam, Germany
  • 5. Southwest Research Institute, Boulder, CO USA
  • 6. Department of Earth Sciences, Natural History Museum, Cromwell Road, London, SW7 5BD UK, and Atmospheric, Oceanic and Planetary Physics, Oxford University, Parks Road, Oxford, OX1 3PU, UK
  • 7. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
  • 8. Department of Physics, Rikkyo University, Toshima, Japan
  • 9. Institute of Planetary Research, German Aerospace Center (DLR), Berlin, Germany, and Universität Heidelberg, Heidelberg, Germany
  • 10. Institute of Optical Sensor Systems, German Aerospace Center, Berlin, Germany, and Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing, China
  • 11. German Aerospace Center (DLR), Institute of Space Systems, Bremen, Germany
  • 12. University of Tokyo, Bunkyo, Japan

Description

This repository contains the tools and data to perform a data assimilation of the infrared data obtained with the MARA instrument on asteroid (162173) Ryugu, as part of the Hayabusa2 and MASOT missions. The corresponding publication is currently under peer-review (TO BE UPDATED).

MARA is a radiometer onboard the MASCOT lander and observed the diurnal temperature variation of a single boulder on the surface of Ryugu through six wavelength channels. With data assimilation the thermal inertia and emissivity of the boulder can be retrieved from the dataset.

All code and data is provided "as is" without warranty of any kind, either express or implied.

version 2 - changes:

the roughness correction factors were corrected with respect to version 1

 

The repository contains:

DataAssimilation.zip - contains the MATLAB files to perform the data assimilation, MARA observation and model results, and a README with instructions

SpectralPlots.zip - contains the MATLAB files, example results and data to compare the emissivity estimates to meteorite spectra, and a README with instructions

SPICE-Kernels.zip - containing the SPICE Kernels of the Landing site, MASCOT Lander, and MARA Instrument used in the analysis

Brightness_temperatures.csv - containing the calibrated brightness temperatures observed by MARA, the local time and uncertainties

F1087492336_751_29464_r2.png - MASCAM image of the boulder presented in the paper


 

Notes

Hamm, M., is acknowledges funding by Geo.X, grant number: SO_087_GeoX, and Hamm, M., and de Wiljes, Jana acknowledge funding by Deutsche Forschungsgemeinschaft (DFG) - SFB1294/1 – 318763901

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