Wavelet analysis of high-frequency signals along the coronal height. The figure comprises several panels illustrating the wavelet analysis of intensity fluctuations across different segments of the coronal height. Each panel represents a distinct region and the corresponding range of intensity fluctuations. Panel (a) presents wavelet analysis of the intensity form R1.02 to 1.05, the range of the intensity fluctuation in 5 × 10⁻³. Panel (b) covers the range R1.05 to R1.1, where the intensity fluctuation is measured at 2 × 10⁻³. Panel (c) encompasses a broader range, from R1.02 to R1.1, with a fluctuation scope of 1.6 × 10⁻³. Panel (d) extends from R1.1 to R1.2, detailing intensity fluctuations of 6 × 10⁻⁴. Panel (e) spans from R1.2 to R1.3, where intensity fluctuations are observed at 5 × 10⁻⁴. Panel (f) illustrates the region from R1.3 to R1.4, recording intensity fluctuations of 4 × 10⁻⁴. Panel (g) demonstrates a larger range from R1.02 to R1.8, with a noted intensity fluctuation of 2 × 10⁻⁴. Panel (h) presents the wavelet analysis against a lunar background, indicating intensity fluctuations of 8 × 10⁻⁴.