PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-22:43:10
G01     41.8           17.3               10.1 +/-    2.26      23.7 +/-    2.26  0.020 / 0.030
G06     175.1          38.0               17.7 +/-    1.03      26.7 +/-    1.03  0.020 / 0.030
G13     239.1          22.8               17.5 +/-    1.38      35.9 +/-    1.38  0.120 / 0.190
G15     271.9          12.7               13.5 +/-    1.59      35.4 +/-    1.59  0.160 / 0.290
G17     342.9          73.5               10.5 +/-    0.44      10.9 +/-    0.44  0.050 / 0.070
G19     272.5          67.8               12.4 +/-    0.74      13.3 +/-    0.74  0.060 / 0.070
G24     317.0          18.2                9.7 +/-    2.04      22.4 +/-    2.04  0.070 / 0.110
G28     70.5           47.1               12.9 +/-    1.11      16.9 +/-    1.11  0.070 / 0.120
G30     153.8          27.1               16.2 +/-    2.03      30.2 +/-    2.03  0.350 / 0.170