![]() From its eight mass threshold counters the HRD can also determine the mass slope of dust particles over the size range from several microns to about one hundred microns in diameter. Especially high rates were registered around the Enceladus orbit suggesting that the Enceladus satellite could be an important source for the dust particles of the E ring. Since the Saturn Orbit Insertion (SOI) last July, the HRD has been returning significant amount of data from the many ring crossing orbits at different distances from the Saturn planet. ![]() The HRD instrument is based on the PVDF thin film technology and has been flown on many space missions in the past, most recently on the STARDUST mission to Wilt-2 comet January 2, 2004. The High Rate Detector (HRD) is part of the CDA and its objective is to determine the high rate dust fluxes and mass distribution of the dust particles at the times when the CDA might be saturated. Cassini's science payload includes the Cosmic Dust Analyzer (CDA) instrument to determine the fluxes and composition of the cosmic dust particles in the vicinity of the Saturn and the Saturnian satellites.
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