PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/20-00:42:40
G01     42.8           18.6                8.1 +/-    2.86      18.4 +/-    2.86  0.180 / 0.410
G06     176.3          35.4               10.4 +/-    1.18      16.3 +/-    1.18  0.270 / 0.290
G13     240.8          23.9               12.4 +/-    1.34      24.9 +/-    1.34  0.040 / 0.050
G15     273.0          13.4               10.1 +/-    1.39      26.2 +/-    1.39  0.040 / 0.060
G17     344.2          73.9                7.8 +/-    0.43       8.0 +/-    0.43  0.020 / 0.020
G19     269.2          67.4                7.5 +/-    0.61       8.1 +/-    0.61  0.020 / 0.020
G24     317.6          16.5                7.7 +/-    2.64      18.5 +/-    2.64  0.060 / 0.080
G28     68.4           47.9                8.6 +/-    2.03      11.1 +/-    2.03  0.050 / 0.070
G30     152.9          27.7               13.2 +/-    1.86      24.2 +/-    1.86  0.200 / 0.240