PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-12:57:50
G01     224.0          14.7                5.2 +/-    1.72      13.2 +/-    1.72  0.110 / 0.190
G03     273.5          70.3                4.9 +/-    0.39       5.2 +/-    0.39  0.120 / 0.210
G14     87.7           26.1                6.2 +/-    1.22      11.8 +/-    1.22  0.030 / 0.050
G16     141.1          49.2                7.8 +/-    0.57      10.0 +/-    0.57  0.030 / 0.060
G22     198.7          65.2                6.9 +/-    1.47       7.5 +/-    1.47  0.040 / 0.050
G23     313.0          43.8                4.5 +/-    1.02       6.2 +/-    1.02  0.030 / 0.050
G26     87.5           53.7                5.7 +/-    0.74       6.9 +/-    0.74  0.040 / 0.060
G31     47.2           27.2                4.5 +/-    1.52       8.4 +/-    1.52  0.050 / 0.060