Figure 4

(Left) Blue dot: locations of BMKG stations, WRBI and WRBB. Red dot: MERRA-2/NASA database locations. Two black dots, “inland” and “sea”, are for inland and on-sea locations. PKY stnads for the Tjilik Riwut BMKG station in Palangka Raya, (Right) vertical profiles of the refractive index, n, and equivalent potential temperature. Blue dot: radiosonde data. Red circle: derived from MERRA-2/NASA database. At 00Z on 13 September 2018. The scale for refractive index is logarithmic. (Visual Studio 2017, EXCEL 2019, Power Point 2019).