VJ103IMG is the short-name for the NOAA-20 — formerly called Joint Polar-orbiting Satellite System-1 (JPSS-1) — platform-derived NASA VIIRS Level-1 terrain-corrected geolocation product and contains the derived line-of-sight (LOS) vectors for each of the 375 m image-resolution or I-bands. The geolocation algorithm uses several inputs that include an Earth ellipsoid, geoid, and a digital terrain model along with the SNPP platform’s ephemeris and attitude data, and knowledge of the VIIRS sensor and satellite geometry. It produces geodetic coordinates (latitude and longitude), and related parameters for each VIIRS Level-1 pixel. The VJ103IMG product includes geodetic latitude, longitude, surface height above the geoid, solar zenith and azimuth angles, sensor zenith and azimuth angles, land/water mask, and quality flag for every pixel location. VJ103IMG provides a fundamental input to derive several VIIRS I-band higher-level products.