{'fraction_non_alphanumeric': 0.015723270440251572, 'fraction_numerical': 0.0010482180293501049, 'mean_word_length': 5.161290322580645, '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}}
Impact of Extended Coherent Integration Times on Weak Signal RTK in an Ultra-Tight Receiver

The use of an ultra-tight GPS/IMU integration strategy has been proposed for carrier phase-based positioning in weak signal environments. The use of IMU-aided tracking allows the carrier tracking loop bandwidths to be narrowed, thereby improving the quality of the carrier phase measurements. To improve tracking sensitivity in GPS receivers it is common to increase the coherent integration time, thereby improving the quality of the measurements when the C/N0 is low. One of the major challenges associated with increasing the coherent integration time is the increased sensitivity to dynamics, a problem which is largely mitigated by the use of INS aiding. Therefore, it would seem possible that ultratight integration coupled with longer coherent integration times could yield a viable solution to the problem of RTK positioning in weak signal environments.