{'fraction_non_alphanumeric': 0.024208566108007448, 'fraction_numerical': 0.0111731843575419, 'mean_word_length': 5.142857142857143, '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 ascension island experiment: Measurement of ionospheric scintillation effects on PALSAR-2

The effect of the ionosphere on SAR imaging has been studied previously from both an analytic and a numerical simulation perspective. Recently, effects visible in SAR imagery have been ascribed to turbulence in the ionosphere. This paper describes an experiment that seeks to use ground-based GPS measurements of the ionospheric scintillation, collected simultaneously with PALSAR-2 imagery, to unambiguously confirm the predictions of the analytic theory. PALSAR-2 (on board the ALOS-2 satellite) was used in spotlight mode to image a 5m corner reflector to obtain an accurate measurement of the point spread function (PSF). Initial results, obtained during the 2014/15 scintillation season, confirm that the analytic theory describing the shape of the SAR PSF is correct. This is then used to obtain two measures of the scintillation, p and CkL, directly from the PALSAR-2 PSF. The collected data set can also be used for further research into ionospheric autofocus techniques.