Galileo (Spacecraft and Satellite Navigation)
Published by The GEO6 project aims at fostering possible novel applications within the scientific UC of GNSS signals, and particularly of GalileoHP G72-102SA Battery.
[edit]Asteroid encounters
A NASA image of 951 Gaspra.
[edit]First asteroid encounter: 951 Gaspra
On October 29, 1991, HP G62-150EQ Batterytwo months after entering the asteroid belt, Galileo performed the first-ever asteroid encounter by a human spacecraft, passing approximately 1,600 kilometers (990 mi) from 951 Gaspra at a relative speed of about 8 kilometers per second (18,000 mph). Several pictures of Gaspra were taken, HP G62-150ET Batteryalong with measurements using the NIMS instrument to indicate composition and physical properties. The last two images were relayed back to Earth in November 1991 and June 1992. The imagery revealed a cratered and very irregular body, measuring about 19 by 12 by 11 kilometers (12 by 7.5 by 7 miles). The remainder of data taken, including low-resolution images of more of the surface, HP G62-150EV Battery were transmitted in late November 1992.[44]
[edit]Second asteroid encounter: 243 Ida and Dactyl
A NASA image of 243 Ida. The bright dot to the right is its moon, Dactyl. HP G62-150SE Battery
On August 28, 1993, Galileo flew within 2,400 kilometers (1,500 mi) of the asteroid 243 Ida. The probe discovered that Ida had a small moon, dubbed Dactyl, measuring only 1.4 km in diameter; this was the first asteroid moon discovered. Measurements using Galileo’s solid state imager, magnetometer and NIMS instrument were taken. From subsequent analysis of this data, HP G62-150SF BatteryDactyl appears to be an SII subtype S type asteroid, and is spectrally different from 243 Ida. It is hypothesized that Dactyl may have been produced by partial melting within a Koronis parent body, while the 243 Ida region escaped such igneous processing.
[edit]Spacecraft malfunctionsHP G62-150SL Battery
[edit]Main antenna failure
Laboratory tests verified that holding ribs 9, 10, and 11 in the stowed position most closely modeled the spacecraft’s telemetry.
Artist’s concept of Galileo at Io; note the fully deployed high-gain antenna. HP G62-153CA BatteryCompare with below image.
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