Figure 7From: GPS-R L1 interference signal processing for soil moisture estimation: an experimental studyPeriodograms and phase matching. The results of satellites G1,G8, G11 and G17 from lower antenna before and after rainfall. (a) 23 to 25. (b) 26 to 22. (c) 5 to 8. (d) 6 to 24.Back to article page