PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-22:57:40
G01     39.0           12.6                9.1 +/-    0.80      23.9 +/-    0.80  0.120 / 0.150
G02     199.1          13.9               23.2 +/-    4.92      59.1 +/-    4.92  0.150 / 0.170
G06     173.6          44.9               17.9 +/-    1.26      24.2 +/-    1.26  0.120 / 0.420
G13     233.9          18.6               19.1 +/-    2.44      43.5 +/-    2.44  0.140 / 0.490
G15     266.3          10.5               13.0 +/-    1.60      35.8 +/-    1.60  0.100 / 0.340
G19     291.6          70.3               12.7 +/-    0.72      13.4 +/-    0.72  0.120 / 0.370
G24     314.7          23.2                8.1 +/-    1.96      16.4 +/-    1.96  0.040 / 0.080
G28     78.5           44.0               12.3 +/-    0.73      16.8 +/-    0.73  0.040 / 0.080
G30     155.3          21.0               18.2 +/-    3.39      39.0 +/-    3.39  0.090 / 0.140