Interferometric synthetic aperture radar (InSAR) techniques are used in numerous applications, especially in long-term monitoring of surface deformations. For these studies, a large data volume is needed and the issue of careful data selection is critical. One of the main parameters to decide whether a particular data set is suitable for a certain application is the interferometric baseline. The knowledge of the baselines limits the extra processing efforts required to determine the usefulness of data sets for the application project. While the European Space Agency (ESA) makes available the interferometric baseline information for the ESA Remote-Sensing Satellites (ERS) 1 and 2 and the Envisat satellite, the baseline information for the Canadian Space Agency's RADARSAT-1 satellite is not available. With the development of the RADARSAT-1 baseline catalog at the Alaska Satellite Facility (ASF) in the University of Alaska Fairbanks' Geophysical Institute, this knowledge gap is closed.