Mdc Operation In Space

3.1. Initial Operations Around the Earth

NOZOMI ("hope" in Japanese) was successfully launched on July 4th (JST) 1998 from Kagoshima Space Center of ISAS (Institute of Space and Astronautical Science). For five months, NOZOMI took elliptic orbits around the Earth with two gravitational swing-bys with the moon. The largest distance between NOZOMI and the Earth was 1,200,000 km in November. On July 10th, MDC was first turned on and subsequently it detected the first impact signal. Figure 1 shows examples of impact signals. Impact number for each observation epoch is shown in Table 1. So far MDC has detected more than 60 sure signals from dust impacts. Figure 2 shows mass and velocity of detected particles.

Table 1

Detected number of dust particles by MDC

Table 1

Detected number of dust particles by MDC

Observation Duration

Impacts

98-7 to 98-12 (circumterrestrial)

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