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The lower the frequency, the more transparent the plant becomes at frequencies below 1 GHz. On the other hand, tree clutter frequently occurs at frequencies above 200 MHz and is as intense as in the microwave regime.
Tree clutter levels are much lower in the VHF range, or below 100 MHz. Both at UHF and VHF, foliage penetration SAR is possible, although there are substantial obstacles to be overcome. One is that there must be high resolution, which is submeter order for UHF and metres order for VHF.
The Global UHF/VHF Band Synthetic Aperture Radar market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
Wide-area monitoring of ground targets using airborne synthetic aperture radar (SAR) in the VHF band in combination with change detection has demonstrated encouraging results.
Both targets that are visible in the open as well as those that are hidden by vegetation may be detected robustly by using VHF-band frequencies. Because of the low levels of clutter backscatter and foliage attenuation, VHF-band SAR can identify concealed targets.
Through the use of change detection, the clutter is further suppressed, greatly lowering the number of false alerts. Due to the low temporal decorrelation, VHF-band SAR is a good choice for change detection. The summer saw the accumulation of a sizable VHF-band SAR and target database.
The main objective of this collection was to assess the performance of VHF-band SAR change detection under varied operational circumstances. The results demonstrate that a change detection-based VHF-band SAR is capable of consistently locating targets as large as trucks that are camouflaged in vegetation. However, under some operating conditions, such as near-grazing angles, the detection performance degrades.
