Dear GIS-IDEAS Participants, Greetings from the Conference Secretariat. We would like to share information on online workshop on SAR Interferometry using Free & Open Source Software and Open Data. More information available in the URL below https://cerg.org.in/sar-workshop Best Regards Secretary GIS-IDEAS 2023 Ha Noi University of Natural Resources and Environment secretariat-2023@gis-ideas.org gisideas.secretary@gmail.com