{"id":3912,"date":"2023-04-18T16:35:08","date_gmt":"2023-04-18T16:35:08","guid":{"rendered":"https:\/\/skywatch.com\/?p=3912"},"modified":"2024-04-17T08:34:32","modified_gmt":"2024-04-17T08:34:32","slug":"what-is-sar","status":"publish","type":"post","link":"https:\/\/skywatch.com\/what-is-sar\/","title":{"rendered":"What is SAR?"},"content":{"rendered":"\t\t
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Synthetic Aperture Radar (SAR) is a specific satellite that can capture imagery in all weather conditions, day or night. SAR<\/span> sends a microwave radar signal to the earth\u2019s surface to detect physical properties. Depending on the ground feature\u2019s properties, some or all of the signal will bounce back up to the sensor creating an image of the ground.\u00a0<\/span><\/p>

It<\/span> is a great tool for capturing images of areas of the world with significant cloud cover, where optical satellites cannot see through the clouds to the ground. SAR imagery can also be useful during severe weather and disaster management. The ability to capture imagery at night also increases how often the satellite can collect imagery.<\/span><\/p>

There are various SAR sensors, which are classified based on the wavelength of their radar signal that is emitted. The different SAR wavelengths are called bands and are designated by letters (ex. X, L, P).\u00a0 EarthCache has X-Band SAR, which is a common type of high resolution SAR. The use cases for SAR data vary depending on the band wavelength.<\/span><\/p>

When is SAR used?<\/b><\/p>

Below are some example use cases for X-Band SAR:<\/span><\/p>