We have examined the precision of interferometric SAR measurements of surface deformation of the Earth using 24-cm wavelength data acquired by the Japanese Earth Resources Satellite 1 (JERS 1) spacecraft, over the lzu peninsula, Japan. Radar images acquired from 1993 to 1994 were made into eleven independent interferograms. Apparent water vapor signatures with equivalent path delay up to 16 cm ...

The monitoring of slow deformation processes by means of SAR Interferometry requests the observed area to mantain its correlation for more years. This usually happens only for those areas having particularly favourable characteristics, such as poor vegetation and dry and no windy climate. However, even in an area which decorrelates in a few weeks, a certain number of features has been observed,...

Mani Earthquake, occurred on Nov. 8, 1997 in Tibet, China, is the strongest event in China since 90’s in 20 century. Investigation and research of its principle and geometry, dynamics related to surface rupture zone is very significant to analyze the development and evolution of China’s earthquake in the future. In this study, we investigate the distribution of surface deformation and extract d...

Moiré interferometry is a common tool if depth estimation from a single image frame is desired. It uses the interference of periodic patterns to measure the topology of a given surface. The actual depth estimation relies on the consistent phase estimation from the interferogram. We show that this task can be simplified by estimating the image phase and the local image orientation simultaneously...

We formulate two-color nonlinear wave-packet interferometry (WPI) for application to a diatomic molecule in the gas phase and show that this form of heterodyne-detected multidimensional electronic spectroscopy will permit the reconstruction of photoinduced rovibrational wave packets from experimental data. Using two phase-locked pulse pairs, each resonant with a different electronic transition,...

We demonstrate an efficient noise dithering procedure for measuring the power spectrum of a weak spectral doublet with a Fourier-transform spectrometer in which the subthreshold interferogram is measured by a 1-bit analog-to-digital converter without oversampling. In the absence of noise, no information is obtained regarding the doublet spectrum because the modulation term s(x) of its interfero...

As confirmed by many scientists, atmosphere has intensive contaminative role on Interferometric Synthetic Aperture Radar (InSAR) measurements. Atmospheric parameters, always influence radar’s phase but the intensity of the atmospheric errors on interferograms depend on the difference of the parameters’ values. In this paper, some calibration methods will be considered in order to reduce the err...

The detection of weak absorption changes induced by an external excitation is often hindered by intense background absorptions as well as by noise. Modulation spectroscopy is an adequate tool to be applied in such a case, provided the system may be periodically stimulated, leading to a periodic reversible or pseudoreversible response. In modulated excitation ~ME! Fourier transform infrared spec...

This paper presents signal processing techniques particularly suited for interferometric Synthetic Aperture Sonar (SAS) systems onboard Autonomous Underwater Vehicles (AUV) (or other platforms carrying high grade navigation systems). The signal processing is applied to data collected in a controlled rail experiment at Elba Island, Italy, using a wideband interferometric SAS and an Inertial Navi...

There are several solutions to code the signal arising from optical long baseline multiaperture interferometers. In this paper, we focus on the non homothetic spatial coding scheme (multiaxial) with the fringe pattern coded along one dimension on one detector (all-in-one). After describing the physical principles governing single mode interferometers using that sort of recombination scheme, we ...