Development of the Laser Altimeter (LIDAR) for Hayabusa2

Mizuno, Takahide; Kase, Teiji; Shiina, T.; Mita, Makoto; Namiki, Noriyuki; Senshu, Hiroki; Yamada, Ryuhei; Noda, Hirotomo; Kunimori, Hiroo; Hirata, Naru; Terui, Fuyuto; Mimasu, Yuya

doi:10.1007/s11214-015-0231-2

Cited by 71 publications

(21 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, since the weight limitations for a planetary explorer are very strict, it is difficult to mount a large laser. The available laser output of the Hayabusa 11) and Hayabusa 2 12) is about 10 mJ/pulse.…”

Section: Obstacle Detection Sensormentioning

confidence: 99%

Three-dimensional Image Sensor with MPPC for Flash LIDAR

Mizuno

Ikeda

Nagano

et al. 2020

Trans. Japan Soc. Aero. S Sci.

View full text Add to dashboard Cite

Three-dimensional (3D) image sensors have many applications, including enabling autonomous vehicles to avoid obstacles and providing guidance, navigation, and control for spacecraft immediately before landing on a celestial body. Flash LIDAR is a system that can acquire a 3D image by emitting a diffuse pulsed laser beam, and hence is suitable for both obstacle detection and terrain measurement. In the 3D image sensors used for Flash LIDAR, a photosensor array and time measurement integrated circuit are vertically bonded. Here, we report the results of a detailed evaluation of the principles, functions, sensitivity, and time measurement accuracy of a prototype 1-k pixel (32 © 32 pixels) 3D image sensor based on a multi-pixel photon counting avalanche photodiode. By counting photons, a 3D image sensor is realized that has both high sensitivity and the ability to measure light intensity.

show abstract

Section: Obstacle Detection Sensormentioning

confidence: 99%

Three-dimensional Image Sensor with MPPC for Flash LIDAR

Mizuno

Ikeda

Nagano

et al. 2020

Trans. Japan Soc. Aero. S Sci.

View full text Add to dashboard Cite

show abstract

“…Deciphering the geologic record of an asteroid requires identification and characterization of the geological features on its surface. Detailed global observations of Ryugu were conducted with Hayabusa2's remote-sensing instruments, including the optical navigation cameras (ONC), including the nadir-viewing telescopic camera (ONC-T), with seven narrow-band filters (0.40 µm (ul), 0.48 µm (b), 0.55 µm (v), 0.59 µm (Na), 0.70 µm (w), 0.86 µm (x), and 0.95 µm (p)) (3)(4)(5), a laser altimeter (LIDAR) (6), and a thermal infrared camera (TIR) (7), sensitive to wavelengths from 8 to 12 µm (8).…”

mentioning

confidence: 99%

The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes

Sugita

Honda

Morota

et al. 2019

Science

Self Cite

375

331

View full text Add to dashboard Cite

The near-Earth carbonaceous asteroid 162173 Ryugu is thought to have been produced from a parent body that contained water ice and organic molecules. The Hayabusa2 spacecraft has obtained global multi-color images of Ryugu. Geomorphological features present include a circum-equatorial ridge, east/west dichotomy, high boulder abundances across the entire surface, and impact craters. Age estimates from the craters indicate a resurfacing age of ≲106 years for the top 1-meter layer. Ryugu is among the darkest known bodies in the Solar System. The high abundance and spectral properties of boulders are consistent with moderately dehydrated materials, analogous to thermally metamorphosed meteorites found on Earth. The general uniformity in color across Ryugu’s surface supports partial dehydration due to internal heating of the asteroid’s parent body.

show abstract

“…Hayabusa2 was launched on 3 December 2014 and arrived at the home position, 20 km earthward from Ryugu on 27 June 2018, and started remote sensing [19] using the optical navigation camera (ONC) [20], the laser altimeter (LIDAR) [21], the near infrared spectrometer (NIRS3) [22], and the TIR [1,4] to characterize the asteroid regarding its shape, spin state, geomorphology, spectral and thermal properties, geologic features, and gravity. The state and characteristics of Ryugu before and after arrival was basically consistent, but the asteroid shape is double top-shaped, and the surface is not covered with regolith but with boulders, and no flat and smooth terrains larger than 10 m scale were found for easy and safe landing [4,[19][20][21][22].…”

Section: Hayabusa2 and Asteroid 162173 Ryugumentioning

confidence: 99%

Thermography of Asteroid and Future Applications in Space Missions

Okada

2020

Applied Sciences

View full text Add to dashboard Cite

Featured Application: Activities in lunar, planetary, and asteroid science and exploration.Abstract: The Near-Earth Asteroid 162173 Ryugu is a C-type asteroid which preserves information about the ancient Solar System and is considered enriched in volatiles such as water and organics associated with the building blocks of life, and it is a potentially hazardous object that might impact Earth. Hayabusa2 is the asteroid explorer organized by the Japan Aerospace Exploration Agency to rendezvous with the asteroid and collect surface materials to return them to Earth. Thermography has been carried out from Hayabusa2 during the asteroid proximity phase, to unveil the thermophysical properties of the primitive Solar System small body, which offered a new insight for understanding the origin and evolution of the Solar System, and demonstrated the technology for future applications in space missions. Global, local, and close-up thermal images taken from various distances from the asteroid strongly contributed to the mission success, including suitable landing site selection, safe assessment during descents into the thermal environments and hazardous boulder abundance, and the detection of deployable devices against the sunlit asteroid surface. Potential applications of thermography in future planetary missions are introduced.

show abstract

Development of the Laser Altimeter (LIDAR) for Hayabusa2

Cited by 71 publications

References 10 publications

Three-dimensional Image Sensor with MPPC for Flash LIDAR

Three-dimensional Image Sensor with MPPC for Flash LIDAR

The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes

Thermography of Asteroid and Future Applications in Space Missions

Contact Info

Product

Resources

About