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Standardization and Integration of InSAR and other Geodetic Data for Deformation Analysis

van Leijen, F.J. (author), van der Marel, H. (author), Samiei Esfahany, S. (author), Hanssen, R.F. (author)

abstract 2017

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Surveying and Mapping

Tiberius, C.C.J.M. (author), van der Marel, H. (author), Reudink, R.H.C. (author), van Leijen, F.J. (author)

This book provides an introduction, at academic level, into the field of surveying and mapping. The book has been compiled based on hand-outs and readers written for the third-year course Surveying and Mapping, in the bachelor program Civil Engineering at Delft University of Technology. This book covers a wide range of measurement techniques,...

book 2022

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InSAR based validation of MERIS IWV cloud gap filling using GPS IWV

Lindenbergh, R.C. (author), Liu, S. (author), Hanssen, R. (author), De Haan, S. (author), Van der Marel, H. (author)

High spatial resolution integrated water vapor (IWV) estimates are available from the MERIS spectrometer on board of Envisat. Unfortunately cloud cover results in loss of a large amount of MERIS IWV pixels. Here methods are presented for filling cloud gaps in MERIS IWV scenes, first, by directly interpolating remaining pixels not affected by...

conference paper 2009

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Validating time series of a combined GPS and MERIS Integrated Water Vapor product

Lindenbergh, R. (author), Van der Marel, H. (author), Keshin, M. (author), De Haan, S. (author)

Increased knowledge of atmospheric water vapor can improve weather predictions and is expected to reduce errors in products derived from GPS and (In)SAR data. At GPS ground stations Integrated Water Vapor (IWV) is estimated from the GPS signal delay with a high temporal resolution. The Envisat MERIS spectrometer obtains spatially dense IWV...

conference paper 2009

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GNSS ambiguity resolution: Which subset to fix?

Verhagen, A.A. (author), Teunissen, P.J.G. (author), Van der Marel, H. (author), Li, B. (author)

A key issue with GNSS carrier phase ambiguity resolution is that often the full set of ambiguities cannot be fixed fast and reliably. A possible strategy is then to resolve only a subset of ambiguities, one for which the probability of correct fixing, the so-called success rate, is sufficiently close to 1. However, a proper subset selection...

conference paper 2011

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Integrated monitoring of subsidence due to hydrocarbon production: Consolidating the foundation

Ketelaar, Gini (author), Bähr, Hermann (author), Liu, Shizhuo (author), Piening, Harry (author), van der Veen, Wim (author), Hanssen, R.F. (author), van Leijen, F.J. (author), van der Marel, H. (author), Samiei Esfahany, S. (author)

This paper describes several geodetic studies that consolidate the reliability and precision of monitoring subsidence due to hydrocarbon production: the deployment of Integrated Geodetic Reference Stations (IGRS); the application of high resolution InSAR; the comparison of different GNSS processing methodologies; the implementation of an...

conference paper 2020

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First analysis of C-band ECR transponders for InSAR geodesy

van der Marel, H. (author), van Leijen, F.J. (author), Hanssen, R.F. (author)

Well-identifiable reference benchmarks are important in SAR interferometry to enable linking between different measurement techniques, or to enable datum connection between the local InSAR datum and Terrestrial Reference Systems. As corner reflectors for C-band are rather large, weather sensitive, and difficult to maintain over time frames of...

conference paper 2018

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On the "Great circle reduction" in the data analysis for the astrometric satellite hipparcos

Van der Marel, H. (author)

doctoral thesis 1988

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Altimetry with GNSS-R interferometry: First proof of concept experiment

Rius, A. (author), Nogués-Correig, O. (author), Ribó, S. (author), Cardellach, E. (author), Oliveras, S. (author), Valencia, E. (author), Park, H. (author), Tarongi, J.M. (author), Camps, A. (author), Van der Marel, H. (author), Van Bree, R. (author), Altena, B. (author), Martín-Neira, M. (author)

The Global Navigation Satellite System Reflectometry (GNSS-R) concept was conceived as a means to densify radar altimeter measurements of the sea surface. Until now, the GNSS-R concept relied on open access to GNSS transmitted codes. Recently, it has been proposed that the ranging capability of the technique for ocean altimetric applications can...

journal article 2011

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VPRO's Beagle II ocean clipper and GPS; measuring sea level technology by means of GPS onboard the Clipper Stad Amsterdam in the Indian Ocean

Vermeersen, B. (author), Van der Marel, H. (author)

journal article 2010

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Short and zero baseline analysis of GPS L1 C/A, L5Q, GIOVE E1B, and E5aQ signals

De Bakker, P.F. (author), Tiberius, C.C.J.M. (author), Van der Marel, H. (author), Van Bree, R.J.P. (author)

Stochastic properties of GNSS range measurements can accurately be estimated using a geometry-free short and zero baseline analysis method. This method is now applied to dual-frequency measurements from a new field campaign. Results are presented for the new GPS L5Q and GIOVE E5aQ wideband signals, in addition to the GPS L1 C/A and GIOVE E1B...

journal article 2011

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Geometry-free undifferenced, single and double differenced analysis of single frequency GPS, EGNOS and GIOVE-A/B measurements

De Bakker, P.F. (author), Van der Marel, H. (author), Tiberius, C.C.J.M. (author)

This paper demonstrates a geometry-free GNSS measurement analysis approach and presents results of single frequency GPS, EGNOS and GIOVE short and zero baseline measurements. The purpose is to separate the different contributions to the measurement noise of pseudo range code and carrier phase observations at the receiver. The influence of...

journal article 2009

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A Field Calibration Solution to Achieve High-Grade-Level Performance for Low-Cost Dual-Frequency GNSS Receiver and Antennas

Krietemeyer, A. (author), van der Marel, H. (author), van de Giesen, N.C. (author), ten Veldhuis, Marie-claire (author)

Low-cost dual-frequency receivers and antennas have created opportunities for a wide range of new applications, in regions and disciplines where traditional GNSS equipment is unaffordable. However, the major drawback of using low-cost antenna equipment is that antenna phase patterns are typically poorly defined. Therefore, the noise in...

journal article 2022

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Estimating Signal-to-Clutter Ratio of InSAR Corner Reflectors From SAR Time Series

Czikhardt, Richard (author), van der Marel, H. (author), van Leijen, F.J. (author), Hanssen, R.F. (author)

The estimation of Signal-to-Clutter Ratio (SCR) of a radar point target, such as a corner reflector, is an essential step for synthetic aperture radar (SAR) interferometry and positioning, as it influences the phase measurement variance as well as the absolute positioning precision. The standard method to estimate the SCR of a point target...

journal article 2021

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High quality zenith tropospheric delay estimation using a low-cost dual-frequency receiver and relative antenna calibration

Krietemeyer, A. (author), van der Marel, H. (author), van de Giesen, N.C. (author), ten Veldhuis, Marie-claire (author)

The recent release of consumer-grade dual-frequency receivers sparked scientific interest into use of these cost-efficient devices for high precision positioning and tropospheric delay estimations. Previous analyses with low-cost single-frequency receivers showed promising results for the estimation of Zenith Tropospheric Delays (ZTDs)....

journal article 2020

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On the Efficacy of Compact Radar Transponders for InSAR Geodesy: Results of Multiyear Field Tests

Czikhardt, Richard (author), van der Marel, H. (author), Papco, Juraj (author), Hanssen, R.F. (author)

Compact and low-cost radar transponders are an attractive alternative to corner reflectors (CRs) for interferometric synthetic aperture radar (InSAR) deformation monitoring, datum connection, and geodetic data integration. Recently, such transponders have become commercially available for C-band sensors, which poses relevant questions on...

journal article 2022

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Kalman filter-based integration of GNSS and InSAR observations for local nonlinear strong deformations

Tondaś, Damian (author), Ilieva, Maya (author), van Leijen, F.J. (author), van der Marel, H. (author), Rohm, Witold (author)

The continuous monitoring of ground deformations can be provided by various methods, such as leveling, photogrammetry, laser scanning, satellite navigation systems, Synthetic Aperture Radar (SAR), and many others. However, ensuring sufficient spatiotemporal resolution of high-accuracy measurements can be challenging using only one of the...

journal article 2023

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Gecoris: An open-source toolbox for analyzing time series of corner reflectors in insar geodesy

Czikhardt, Richard (author), van der Marel, H. (author), Papco, Juraj (author)

Artificial radar reflectors, such as corner reflectors or transponders, are commonly used for radiometric and geometric Synthetic Aperture Radar (SAR) sensor calibration, SAR interferometry (InSAR) applications over areas with few natural coherent scatterers, and InSAR datum connection and geodetic integration. Despite the current abundance...

journal article 2021

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InSAR datum connection using GNSS-augmented radar transponders

Mahapatra, P.S. (author), van der Marel, H. (author), van Leijen, F.J. (author), Samiei Esfahany, S. (author), Klees, R. (author), Hanssen, R.F. (author)

Deformation estimates from Interferometric Synthetic<br/>Aperture Radar (InSAR) are relative: they form a ‘free’<br/>network referred to an arbitrary datum, e.g. by assuming a reference<br/>point in the image to be stable. However, some applications<br/>require ‘absolute’ InSAR estimates, i.e. expressed in<br/>a well-defined terrestrial...

journal article 2017

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Integrated atmospheric water vapor estimates from a regional GPS network

Baltink, Henk Klein (author), van der Marel, H. (author), van der Hoeven, AGA (author)

Integrated atmospheric water vapor (IWV) estimates from a 15-station-wide network of Global Positioning System (GPS) receivers have been collected continuously since November 1997. The core of this network consists of five stations of the active GPS reference system in the Netherlands. A network with sufficient long baselines was chosen to...

journal article 2002