|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|1780860||1523911||2016||4 صفحه PDF||سفارش دهید||دانلود رایگان|
• A new application of passive sounding using Jupiter's natural radio emissions.
• Low resource method for sounding Europa's ice shell using a lander.
• Significant improvement in sensitivity to a subsurface ocean.
We estimate the sensitivity of a lander-based instrument for the passive radio detection of a subsurface ocean beneath the ice shell of Europa, expected to be between 3 km and 30 km thick, using Jupiter's decametric radiation. A passive technique was previously studied for an orbiter. Using passive detection in a lander platform provides a point measurement with significant improvements due to largely reduced losses from surface roughness effects, longer integration times, and diminished dispersion due to ionospheric effects allowing operation at lower frequencies and a wider band. A passive sounder on-board a lander provides a low resource instrument sensitive to subsurface ocean at Europa up to depths of 6.9 km for high loss ice (16 dB/km two-way attenuation rate) and 69 km for pure ice (1.6 dB/km).
Journal: Planetary and Space Science - Volume 129, 15 September 2016, Pages 118–121