PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-19:27:50
G01     115.7          20.4               18.1 +/-    1.32      39.5 +/-    1.32  0.050 / 0.100
G07     89.1           64.9               15.2 +/-    0.38      16.6 +/-    0.38  0.050 / 0.080
G08     44.5           31.3               11.7 +/-    1.09      19.9 +/-    1.09  0.040 / 0.060
G09     176.8          22.6               17.6 +/-    1.35      36.3 +/-    1.35  0.040 / 0.100
G11     103.6          41.4               17.3 +/-    1.33      24.6 +/-    1.33  0.040 / 0.050
G13     315.9          22.1               10.0 +/-    1.27      20.9 +/-    1.27  0.030 / 0.040
G17     204.0          24.6               19.8 +/-    1.32      39.1 +/-    1.32  0.110 / 0.170
G18     90.8           22.2               14.8 +/-    1.36      31.0 +/-    1.36  0.110 / 0.160
G28     300.6          58.9               14.4 +/-    0.53      16.5 +/-    0.53  0.030 / 0.040
G30     358.9          72.7               14.0 +/-    1.16      14.5 +/-    1.16  0.040 / 0.050