{'fraction_non_alphanumeric': 0.01827956989247312, 'fraction_numerical': 0.0, 'mean_word_length': 5.084967320261438, '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}}
Management of radar resources for space debris tracking

Tens of thousands of debris are expected in the near future in the most critical Low Earth Orbit regimes, hence representing a serious threat for European space assets. In the frame of the Space Situational Awareness (SSA) Preliminary Programme of the European Space Agency, the design of a ground-based phased array radar - aimed at debris detection and tracking - has been proposed. The sensor will provide regularly new measurements of objects' orbital parameters to the cataloguing centre. Track-while-Scan survey has been proposed for efficiently covering a wide volume of the sky, whereas Active Tracking tasks might be engaged in order to improve the tracking performance on specific targets. Concepts for combining Survey/Tracking tasks and managing the radar resources are analysed in this paper against the requirements dictated by SSA collision warning services.