How many LANDSAT satellites are currently operational?

The current number of operational LANDSAT satellites is an important aspect of remote sensing and Earth observation. As of now, there are three active LANDSAT satellites in operation: LANDSAT 7, LANDSAT 8, and LANDSAT 9. Each of these satellites has unique features and capabilities that enhance the ability to monitor and analyze land use, vegetation, and environmental changes over time.

LANDSAT 9, which was launched in September 2021, is designed to provide continuity of data collection with improved resolution and sensor technology. LANDSAT 8 and LANDSAT 7 continue to provide valuable data, although LANDSAT 7 has some limitations due to its aging technology and operational issues.

Having multiple satellites operational ensures a more consistent flow of data and allows for the cross-validation of information, which is crucial for various scientific research and environmental studies. This capacity also helps mitigate gaps in data collection that might arise from one satellite being temporarily out of service, thus maintaining a comprehensive data set for analysis.