The 1.0 version of S1TBX-1.0.3 is provided as a free download on our website. This free software is an intellectual property of ESA. The software is categorized as System Utilities. You can run S1TBX-1.0.3 on Windows 7/8/10/11 64-bit. The most popular version of the S1TBX-1.0.3 1.0.
From the developer:
The SENTINEL-1 Toolbox (S1TBX) consists of a collection of processing tools, data product readers and writers and a display/analysis application to support the large archive of data from ESA SAR missions including SENTINEL-1, ERS-1 & 2 and ENVISAT, as well as third party SAR data from ALOS PALSAR, TerraSAR-X, COSMO-SkyMed and RADARSAT-2.
You may want to check out more software, such as Snappy Fax 2000 or iPHUC for Windows, which might be related to S1TBX-1.0.3.