OSCAR

• The Argos Data Collection and location System (DCS) is a data collection and relay program that provides global coverage and platform location.
• The Argos program is administered under a joint agreement between the National Oceanic and Atmospheric Administration (NOAA) and the French Space Agency, Centre National d’Etudes Spatiales (CNES).
• It started on the NOAA polar operational environmental satellites but is now embarked on a 25 nano satellite constellation called Kinéis planned to be in orbit by 2024.
• NOAA, EUMETSAT and ISRO will launch satellites to contribute to the constellation.
• The satellites are in sun-synchronous orbits with a planned lifetime of 5 years.
• A revisit time of 15 mins between satellite passes
• More details:here

Access to the data here