Radar observations of the moon at 10-cm wavelength
نویسندگان
چکیده
منابع مشابه
New High-resolution 70-cm Wavelength Radar Images of the Moon
Introduction: Radar maps of the lunar nearside at 70-cm wavelength currently have a spatial resolution of 3-5 km, and have been used to identify differences in regolith physical and chemical properties [e.g., 1-3]. Data at such long wavelengths are of particular interest due to their penetration depth of 5-10 m in even lossy lunar materials. Using the Arecibo Observatory 430 MHz radar system, w...
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The south polar region of the Moon contains areas permanently shadowed from solar illumination, which may provide cold traps for volatiles such as water ice. Previous radar studies have emphasized the search for diagnostic polarization signatures of thick ice in areas close to the pole, but near-surface regolith properties and regional geology are also important to upcoming orbital studies of t...
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[1] A technique for the estimation of humidity in the lower troposphere using simultaneous dual‐wavelength radar observations is proposed and tested. The method compares the reflectivity from clouds and precipitation of a non‐attenuated wavelength (S‐band, 10 cm) and an attenuated wavelength (Ka‐band, 8 mm) to compute the clear‐air gaseous attenuation at the attenuated wavelength. These estimat...
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Recommendations for applying nitrogen (N) fertilizer in autumn involve delaying applications until daily soil temperature at 10-cm depth is #10 C. Daily soil temperature data during autumn were examined from 26 sites along a transect from 36 to 49 N latitude in mid-continent USA. After soils first cooled to #10 C (First10), temperatures usually rebounded for varying amounts of time before the f...
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We report preliminary results of the partial eclipse seen from the BIMA millimeterwavelength interferometer in northern California. The use of an interferometer has many advantages over previous single-dish eclipse observations at 3 mm, and in particular it allows a quite different type of measurement of the height of the "3-mm limb" which is direct and precise : we find it to be 11.9" ± 0.4" a...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1959
ISSN: 0074-1809
DOI: 10.1017/s007418090005049x