Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Othmar Frey"'
Publikováno v:
ISPRS Open Journal of Photogrammetry and Remote Sensing, Vol 13, Iss , Pp 100074- (2024)
Terrestrial Radar Interferometry (TRI) is widely adopted in geomonitoring applications due to its capability to precisely observe surface displacements along the line of sight, among other key characteristics. As its deployment grows, TRI is also inc
Externí odkaz:
https://doaj.org/article/e779f4944d844f29b30513d3c9bea271
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 17626-17636 (2024)
Accuracy of radar interferometry is often hindered by the atmospheric phase screen (APS). To address this limitation, the geostatistical approach known as Kriging has been employed to predict APS from sparse observations for compensation purposes. In
Externí odkaz:
https://doaj.org/article/82863b9cd24045d68f1d95552d9ccb09
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 11750-11760 (2024)
In this study, we investigate a new approach to detect railway track anomalies based on surface displacements retrieved from interferometric time series of satellite radar data. The condition of the ballast substructure is critical for the longevity
Externí odkaz:
https://doaj.org/article/bf1b7beded10408b8b66ccfd9edefa93
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 9706-9727 (2024)
We present ground-based Ku-band radar observations of the snow cover on top of the Great Aletsch Glacier carried out over two observation periods, in August 2021 and in March 2022. The observations were carried out with the combined mono/bistatic ver
Externí odkaz:
https://doaj.org/article/9db6d6baed934d44b981bc2c8e8abe09
Publikováno v:
Remote Sensing, Vol 16, Iss 19, p 3600 (2024)
In 2023, the Chinese company PIESAT launched the multi-static X-band SAR constellation Hongtu-1 (HT1). HT1 consists of the active monostatic SAR sensor HT1-A and the three additional passive SAR receivers HT1-B, HT1-C and HT1-D. The passive sensors a
Externí odkaz:
https://doaj.org/article/02041ee18155492292bc0d3b8291efe8
Publikováno v:
Atmosphere, Vol 15, Iss 6, p 632 (2024)
Spatial and temporal variation in the free electron concentration in the ionosphere affects SAR interferograms, in particular at low radar frequencies. In this work, the identification, estimation, and compensation of ionospheric path delay phases in
Externí odkaz:
https://doaj.org/article/45d52c6dbf844f40ab75034ebdf8a20b
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 15, Pp 8402-8415 (2022)
Agile synthetic aperture radar (SAR) platforms such as car-borne and UAV-borne SAR systems require combined inertial navigation systems (INS) and global navigation satellite systems (GNSS) to measure the radar sensor trajectories used for focusing an
Externí odkaz:
https://doaj.org/article/ea56a2e1bc4946b981dfaa1692118c53
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 14, Pp 7734-7750 (2021)
The accuracy of surface displacements measured by differential radar interferometry is significantly degraded by the atmospheric phase screen (APS). This article presents a practical and efficient approach for APS mitigation based on the coherent pix
Externí odkaz:
https://doaj.org/article/e91cb1efbde14e07aa1e12dafe80077a
Publikováno v:
Remote Sensing, Vol 11, Iss 15, p 1789 (2019)
We compare tropospheric delays from Global Navigation Satellite Systems (GNSS) and Synthetic Aperture Radar (SAR) Interferometry (InSAR) in a challenging mountainous environment in the Swiss Alps, where strong spatial variations of the local troposph
Externí odkaz:
https://doaj.org/article/4b025abe56814202b42cc9680f473312
Publikováno v:
Remote Sensing, Vol 10, Iss 7, p 1014 (2018)
The estimation of deformation parameters using persistent scatterer interferometry (PSI) is limited to single dominant coherent scatterers. As such, it rejects layovers wherein multiple scatterers are interfering in the same range-azimuth resolution
Externí odkaz:
https://doaj.org/article/8532c7abf66c4477be2e405183d2d5a9