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Fig. 2 | Earth, Planets and Space

Fig. 2

From: Environmental assessment in the prelaunch phase of Hayabusa2 for safety declaration of returned samples from the asteroid (162173) Ryugu: background monitoring and risk management during development of the sampler system

Fig. 2

Representative snapshots of the environmental assessment. a Practical deployment of the monitor coupon in the processes of ISAS (ISAS-C building clean room) and TSC (JAXA Tsukuba Space Center), b STA1 building clean room at TNSC (JAXA Tanegashima Space Center), c SFA2 building clean room, d VAB building clean room at TNSC, and e, f the final launch site at TNSC. When moving to the TNSC monitored with coupon set #5, the continuous flow of nitrogen was temporarily stopped due to logistical reasons, and then the nitrogen purge state (i.e., without exposure time of ambient atmosphere) was maintained by sealing the chamber

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