Мониторинг криогенных процессов полуострова Ямал на основе радарных данных TANDEM-X и ALOS-2 PALSAR-2 : Monitoring of cryogenic processes of the Yamal Peninsula based on radar data TANDEM-X and ALOS-2 PALSAR-2

• Published in: Вычислительные технологии
• Main Authors: Кирбижекова, И.И., Чимитдоржиев, Т.Н., Дворников, Ю.А., Дагуров, П.Н., Дмитриев, А.В., Быков, М.Е., Балтухаев, А.К.
• Format: Text
• Language: Russian
• Published: Вычислительные технологии 2018
• Subjects: спутниковая радиолокация; поляриметрическая декомпози- ция; дифференциальная интерферометрия; ТanDEM-X; ALOS-2 PALSAR-2; крио- морфогенез; satellite radar; polarimetric decomposition; differential interferometry; TanDEM-X; cryomorphogenesis; Yamal Peninsula
• Online Access: https://dx.doi.org/10.25743/ict.2018.23.16490; http://www.ict.nsc.ru/jct/annotation/1867

Приведены результаты исследования возможности применения поляриметрических и интерферометрических данных X-иL-диапазонов TanDEM-X и ALOS-2 PALSAR-2 для мониторинга криогенных рельефообразующих процессов полуострова Ямал. Выполнен статистический анализ сезонных изменений интенсивности и параметров поляриметрической Н - А - α -декомпозиции на участках с оползнями, активно растущими и пассивными термоцирками научного полигона Васькины дачи. : The article presents the results of the developed methods for thermal-degradation processes detection and monitoring based on the X- and L-bands radar data. The research objects are developing thermocircuits and collapsing slopes in the coastal zone of ten lakes of “Vaskiny Dachi” polygon (Central Yamal, 70∘15′N, 69∘05′E). To detect the formed and active cryogenic formations TanDEM-X and ALOS-2 PALSAR-2 interferometric and polarimetric data (VV, VH) of 2015-2016 were used. The research was carried out in three directions: 1) digital terrain models (DTM) with high resolution construction using differential interferometry methods and the cryogenic formations topographical features identification, temporal changes in DTMs observation; 2) comparative statistical analysis of the total intensity and the polarimetric Н-А-α -decomposition components for cryogenic formations and adjacent stable sites; 3) development of a technique for express detection of such formations on the basis of total intensity and polarimetric Н-А-α -decomposition components images texture. It is established that the intensity, polarimetric characteristics, topography parameters and textures of radar images significantly differ from those for neighbouring stable regions (more than 3 σ ) for active thermocircuits. Intensity variations are most significant, but the localization of cryogenic formations can be limited by the radar survey geometric conditions. For passive thermocircuits, landslides in the coastal zone, deviation of intensity and polarimetric characteristics from background ∼ σ , therefore as an indicator a set of polarimetric Н-А-α -decomposition parameters should be used. Combining parameters α and H can be the basis for express diagnostics of the occurrence and activation of cryogenic processes in the area of the present study. : №4(23) (2018)