winter in Mars' Northern Hemisphere, where the Perseverance rover and Ingenuity helicopter are exploring an ancient river delt a that once fed into Jezero Crater billions of years ago.As the planet's main feature, dust drives Martian weather, but the planet is no stranger to snow, ice and ...
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said Sylvain Piqueux,a Mars scientist at NASA'S Jet Propulsion Laboratory in Pasadena,California,in a statement. So far,no orbiters(轨道飞行器) or rovers have been able to see snow fall on the red planet because the weather phenomenon only occurs at the poles beneath cloud cover at night....
11] SAR systems. The first multifrequency fully polarimetric SAR measurements over sea ice were airborne SAR data acquired in 1988 and introduced in [12]. Herein, the polarimetric SAR signatures of different sea ice types were studied for the first time in C-, L-, and P-band. In [12],...