Characteristics of TanDEM-X experimental modes

Bello, José Luis Bueso; González, Carolina; Kraus, Thomas; Bräutigam, Benjamin

doi:10.1109/igarss.2012.6350819

Cited by 6 publications

(3 citation statements)

References 2 publications

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“…For this study, eight such pairs of images were obtained from the German Aerospace Center (DLR) in coregistered single look slant range complex (CoSSC) format. The CoSSC products were captured using stripmap mode, used horizontal polarisation both in transmission and reception (HH), and had an azimuth resolution of approximately 3 m [38]. The range resolution, meanwhile, varies according to the bandwidth of the transmitted signal: those acquisitions for which a bandwidth of 150 MHz was possible have a slant range resolution of 1.3 m, while other acquisitions were limited to 100 MHz and have a slant range resolution of 1.9 m [38].…”

Section: Tandem-x Acquisitionsmentioning

confidence: 99%

“…The CoSSC products were captured using stripmap mode, used horizontal polarisation both in transmission and reception (HH), and had an azimuth resolution of approximately 3 m [38]. The range resolution, meanwhile, varies according to the bandwidth of the transmitted signal: those acquisitions for which a bandwidth of 150 MHz was possible have a slant range resolution of 1.3 m, while other acquisitions were limited to 100 MHz and have a slant range resolution of 1.9 m [38]. Table 1 shows the dates, pass directions and bandwidths of the eight CoSSC products in chronological order, indicating also the dates of selective logging in our field plots.…”

Section: Tandem-x Acquisitionsmentioning

confidence: 99%

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An Effective Method for InSAR Mapping of Tropical Forest Degradation in Hilly Areas

et al. 2022

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Current satellite remote sensing methods struggle to detect and map forest degradation, which is a critical issue as it is likely a major and growing source of carbon emissions and biodiveristy loss. TanDEM-X InSAR phase height (hϕ) is a promising variable for measuring forest disturbances, as it is closely related to the mean canopy height, and thus should decrease if canopy trees are removed. However, previous research has focused on relatively flat terrains, despite the fact that much of the world’s remaining tropical forests are found in hilly areas, and this inevitably introduces artifacts in sideways imaging systems. In this paper, we find a relationship between hϕ and aboveground biomass change in four selectively logged plots in a hilly region of central Gabon. We show that minimising multilooking prior to the calculation of hϕ strengthens this relationship, and that degradation estimates across steep slopes in the surrounding region are improved by selecting data from the most appropriate pass directions on a pixel-by-pixel basis. This shows that TanDEM-X InSAR can measure the magnitude of degradation, and that topographic effects can be mitigated if data from multiple SAR viewing geometries are available.

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Section: Tandem-x Acquisitionsmentioning

confidence: 99%

Section: Tandem-x Acquisitionsmentioning

confidence: 99%

An Effective Method for InSAR Mapping of Tropical Forest Degradation in Hilly Areas

et al. 2022

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“…As such, time deviations should be compensated first. The TanDEM-X adopts the GPS signals to trigger its startup time, and then its system time is controlled with a high-stable clock source [23]. Different from the TanDEM-X, the LT-1 uses a pulse-per-second pulse of the GPS to synchronize time, and the GPS-disciplined clock [24] is used to maintain the time synchronization.…”

mentioning

confidence: 99%

An Advanced Interferometric Baseline Estimation Method (IBEM) for Spaceborne Bistatic SAR

Zhang,

Li,

et al. 2024

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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Spaceborne bistatic SAR (BiSAR) employs singlepass Cross-Track Interferometry (XTI) to invert Digital Elevation Models (DEMs) of target areas. However, the accuracy of the inverted DEM is affected by various factors, especially interferometric baseline estimation. To this end, this paper proposes an advanced Interferometric Baseline Estimation Method (IBEM) for spaceborne BiSAR. First, the IBEM compensates for the time synchronization deviation of BiSAR systems using the pulse exchange phase synchronization method. Subsequently, the time, position, and velocity vectors of satellites are input into a highprecision orbit propagator to derive the state vectors at the imaging time. Leveraging these state vectors, the interferometric baseline is calculated with the main satellite that transmits radar signals as the origin of the coordinate system. Eventually, interferometric baseline estimation and DEM generation are performed based on two sets of data from the LuTan-1 (LT-1) BiSAR system, and the generated DEMs are compared with the external reference DEM to evaluate the performance of the IBEM and the LT-1 system. Results indicate that the proposed IBEM can accurately estimate the interferometric baseline and has extensive application prospects in future spaceborne multibaseline Interferometric SAR (InSAR) missions.

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Evaluation of DEM generation based on Interferometric SAR using TanDEM-X data in Tokyo

Avtar¹,

Yunus²,

Kraines³

et al. 2015

Physics and Chemistry of the Earth, Parts A/B/C

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Characteristics of TanDEM-X experimental modes

Cited by 6 publications

References 2 publications

An Effective Method for InSAR Mapping of Tropical Forest Degradation in Hilly Areas

An Effective Method for InSAR Mapping of Tropical Forest Degradation in Hilly Areas

An Advanced Interferometric Baseline Estimation Method (IBEM) for Spaceborne Bistatic SAR

Evaluation of DEM generation based on Interferometric SAR using TanDEM-X data in Tokyo

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