Questions & Answers
Yes, our subscriptions to CATALYST insights include access to the webapp for visual interpretation and analysis, as well as our API through AWS Data Exchange.
Our team of highly trained SAR scientists and specialists examine the hyper-parameters, input datasets, interferograms and output results against in situ measurements, if available, before new ground displacement measurements are delivered to your through your data feed.
Yes, we have a number of ways that you can evaluate the quality of measurements before committing to a 1 year subscription. Contact us at email@example.com to learn more.
GPS stations or in situ measurements are not required, but they can be used to calibrate the measurements, which often improves accuracy and to validate the measurements that are being delivered to you.
We use DEMs to remove the topographic residual phase differences from the local topography, we also perform orbital adjustments to reduce the residual effects from the orbit.
We are compensating for a number of effects that can contribute to error, such as terrain and orbits, plus we use an SBAS-PSI workflow that only provides measurements for stable targets, which reduces the chance of errors propagating in the results. Furthermore, we can calibrate with in situ measurements to help further remove errors.
Yes, there are a number of differences between TerraSAR-X and Sentinel-1. They are two very different datasets and sensors, built and operated by two different organizations, Airbus and ESA, respectively. Both are very suitable for InSAR applications as they both have very stable orbital tubes and provide excellent orbital information. Resolution and price are the main specifications that people consider when selecting a data source.
We providevertical displacement measurements. We are looking into horizontal, which would require building a stack from both ascending and descending orbits.
There are a number of articles that showcase InSAR being used for detecting subsurface blowouts.
CATALYST Insights is a data service where we use our algorithms and science, as well as our team of specialists to generated the ground displacement measurements and then deliver them as a data feed to our users through our Insights Webapp or API.
We use a hybrid model that combines Short-baseline Subset (SBAS) and Persistent Scatterer Interferometry (PSI)