PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-13:27:50
G03     217.1          61.5                8.3 +/-    0.68       9.3 +/-    0.68  0.170 / 0.520
G07     253.5          12.0                5.6 +/-    1.36      15.0 +/-    1.36  0.150 / 0.460
G09     308.1          24.6                7.4 +/-    0.86      14.5 +/-    0.86  0.070 / 0.080
G14     105.0          12.9                7.7 +/-    1.23      20.1 +/-    1.23  0.050 / 0.080
G16     103.4          63.4                9.1 +/-    0.96      10.1 +/-    0.96  0.040 / 0.060
G22     186.3          43.4                8.7 +/-    2.24      12.0 +/-    2.24  0.120 / 0.280
G23     331.1          59.9                7.8 +/-    1.08       8.9 +/-    1.08  0.070 / 0.410
G26     56.4           44.8                6.3 +/-    0.88       8.5 +/-    0.88  0.110 / 0.410
G31     57.5           11.5                7.4 +/-    3.68      19.9 +/-    3.68  0.040 / 0.050