What is the recommended altitude range to obtain the highest quality Strip SAR imagery?

• A. Between 5,000 and 15,000 ft
• B. Between 10,000 and 30,000 ft
• C. Between 20,000 and 40,000 ft
• D. Between 0 and 5,000 ft

Answer: (B)

Altitude controls how the radar illuminates the ground and how large the ground footprint and resolution will be in Strip SAR. If you fly too low, you get very high potential resolution but a narrow swath and more geometric and vibrations-related distortions, making consistent image quality harder to maintain across a strip. If you fly too high, the footprint becomes large and the incidence angle grows more shallow, which tends to blur resolution, worsen geometric distortions like layover and shadow, and reduce radiometric quality. The middle ground—roughly 10,000 to 30,000 feet—gives a favorable balance: a wide enough swath to cover useful area, incidence angles that illuminate targets well for both range and azimuth resolution, and manageable motion compensation and processing. That combination yields the highest quality Strip SAR imagery.