{'fraction_non_alphanumeric': 0.01685985247629083, 'fraction_numerical': 0.006322444678609062, 'mean_word_length': 5.129032258064516, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
The Spatiotemporal Distribution of Microwave Brightness Temperature in the Von Karman Crater Based on Filed Theory

The landing area of Chang'E-4 is initially selected as the Von Kármán crater inside the South Pole-Aitken basin on the lunar farside. The research would outline science opportunities based on the microwave radiometer data by the field theory. The SVD analyses between the brightness temperature fields of 3 GHz and 37 GHz were done with versus time series data which were calculated by hour angle correction in the Von Kármán crater. The results showed that the main factors affecting the spatiotemporal distribution of brightness temperature are roughness, but less affected by FTA. According to the spatial and temporal distribution of brightness temperature anomalies, the site A(Fig 8) was selected as the preselected landing area for Chang'e-4., which is located in the dense isoline region of the heterogeneous correlation map.