Hayabusa2 Thermal InfraRed imager (TIR) Level3 Data : Brightness temperature map (provisional version)

Overview

Description

The thermal infrared imager (TIR) onboard the Hayabusa2 spacecraft is based on an uncooled micro-bolometer array that can obtain thermal images of a target asteroid 162173 Ryugu (formerly 1999JU3).
The TIR is the bolometric imager with a broadband filter in the thermal infrared range (8 to 12 um). It covers the temperature range of about 150 to 460 K and has a field of view of about 16.7 x 12.7 degrees, with 0.051 degrees per pixel (328 x 248). The primary objectives of this instrument are to investigate thermophysical properties of the surface of asteroids, such as porosity, grain size, and boulder abundance. The brightness temperature map of the asteroid is derived from TIR data for each time, and the brightness temperature map at each time and its forecast is obtained with the ground calibration data.

This dataset contains the brightness temperature map on the Ryugu shape model derived from TIR data for each time.
Each file has columns such as Polygon ID, Longitude, Latitude, Phase angle, Incidence angle, Emission angle, Pixel X, Pixel Y, Brightness temperature, and Local solar time, Local solar time (normal vector).

Keywords

HAYABUSA2 📓📅Thermal InfraRed imager (TIR) 📓📅PlanetaryScience 📓📅Asteroid 📓📅(162173) Ryugu 📓📅Infrared 📓📅

Version

provisional

Publication Date

2017

Temporal Coverage

from 2018-07-10T06:07:11Z to 2019-11-12T01:22:49Z

Identifier

  • Title: Hayabusa2 Thermal InfraRed imager (TIR) Level3 Data : Brightness temperature map (provisional version)
  • ID: darts:hayabusa2-tir-provisional-data
  • URL: https://darts.isas.jaxa.jp/datasets/darts:hayabusa2-tir-provisional-data

Data Distribution

https://data.darts.isas.jaxa.jp/pub/hayabusa2/tir_bundle/data_map/ (text/plain, text/csv)

Data directory Structure
pub/hayabusa2/tir_bundle/data_map/
└── proximity/
    ├── readme.txt
    ├── list.txt
    ├── tar.sh
    ├── 20180710.tar.gz
    ├── 20180714.tar.gz
    ├── ...
    ├── {YYYYMMDD}.tar.gz
    └── Old/  [not expanded]

Creator

  • ISAS > Institute of Space and Astronautical Science (宇宙科学研究所) [ROR: 034gcgw60]

Copyright Holder

  • JAXA > Japan Aerospace Exploration Agency (宇宙航空研究開発機構) [ROR: 059yhyy33]
  • ISAS > Institute of Space and Astronautical Science (宇宙科学研究所) [ROR: 034gcgw60]

License

References

  • Senshu, H., (2022) International Journal of Thermophysics - Development of Numerical Model of the Thermal State of an Asteroid with Locally Rough Surface and Its Application [DOI: 10.1007/s10765-022-03030-z]
  • Sakatani, N. (2021) Nature Astronomy - Anomalously porous boulders on (162173) Ryugu as primordial materials from its parent body [DOI: 10.1038/s41550-021-01371-7]
  • Arai, T. (2021) Earth, Planets, and Space - Geometric correction for thermographic images of asteroid 162173 Ryugu by TIR (thermal infrared imager) onboard Hayabusa2 [DOI: 10.1186/s40623-021-01437-w]
  • Shimaki, Y. (2020) Icarus - Thermophysical properties of the surface of asteroid 162173 Ryugu: Infrared observations and thermal inertia mapping [DOI: 10.1016/j.icarus.2020.113835]
  • Okada, T. (2020) Nature - Highly porous nature of a primitive asteroid revealed by thermal imaging [DOI: 10.1038/s41586-020-2102-6]
  • Okada, T. (2017) Space Science Review - Thermal Infrared Imaging Experiments of C-Type Asteroid 162173 Ryugu on Hayabusa2 [DOI: 10.1007/s11214-016-0286-8]
  • Takita, J. (2017) Space Science Reviews - Feasibility and Accuracy of Thermophysical Estimation of Asteroid 162173 Ryugu (1999 JU3) from the Hayabusa2 Thermal Infrared Imager [DOI: 10.1007/s11214-017-0336-x]
  • Arai, T. (2017) Space Science Review - Thermal Imaging Performance of TIR Onboard the Hayabusa2 Spacecraft [DOI: 10.1007/s11214-017-0353-9]
  • Endo, K. (2017) IEEE Aerospace Conference - HEAT: Image and database browser for the thermal imager on Hayabusa2 [DOI: 10.1109/AERO.2017.7943827]

Relations

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