IEEE - Aerospace and Electronic Systems - March 2021 - 20

Deep Space In Situ Imaging Results of Commercial Off-the-Shelf Visual Monitoring System Aboard the Hayabusa2...

Figure 7.
Hayabusa2 equipment and installation locations of the VMSUC.

FLIGHT SEQUENCE
The Hayabusa2 was launched via the H-IIA rocket and
reached Ryugu on June 27, 2018. Two touchdown missions were performed on February 22, 2019 and July 11,
2019 (Figure 8).

background. This was done to check the functionality of
CAM-H after Hayabusa2 reached Ryugu on August 14,
2018. The captured image is shown in Figure 10. Even
though we cannot assess all image pixels, the image is
captured against a deep space background and is not filled
by objects. No significant degradation was found when
comparing sample horn images.

IN SITU RESULTS ON HAYABUSA-2
IMAGES ACQUIRED DURING TOUCHDOWN REHEARSAL

IMAGES ACQUIRED DURING FLIGHT TO RYUGU
After its launch, Hayabusa2 was checked for basic functions. During the checkout sequence, CAM-H captured
images of the sample horn to verify its deployment.
Figure 9 shows this initial image, the first captured by
CAM-H against a deep space background.
After three years of flight, CAM-H captured another
image of the sample horn against a deep space

Before the touchdown missions took place, several touchdown rehearsals occurred. During the touchdown rehearsals, CAM-H acquired images to allow for in situ
adjustments to capturing parameters such as exposure
rates and image sensor gains. Although the CAM-H image
sensors can automatically adjust exposure rates and sensor
gains, the automatically captured images are overexposed
because the reflectances on the Ryugu surface are quite

Figure 8.
Flight sequence to Ryugu.

20

IEEE A&E SYSTEMS MAGAZINE

MARCH 2021



IEEE - Aerospace and Electronic Systems - March 2021

Table of Contents for the Digital Edition of IEEE - Aerospace and Electronic Systems - March 2021

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IEEE - Aerospace and Electronic Systems - March 2021 - Cover1
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IEEE - Aerospace and Electronic Systems - March 2021 - Contents
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