PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/23-17:42:40
G01     305.7          34.0                7.2 +/-    1.36      11.7 +/-    1.36  0.070 / 0.130
G10     107.6          39.4                7.9 +/-    0.51      11.6 +/-    0.51  0.060 / 0.150
G11     282.2          27.6                6.1 +/-    1.53      11.2 +/-    1.53  0.040 / 0.040
G14     358.3          66.4                6.5 +/-    0.61       7.0 +/-    0.61  0.040 / 0.040
G22     310.3          27.5                4.8 +/-    0.95       8.8 +/-    0.95  0.090 / 0.250
G25     81.0           17.1                8.1 +/-    1.11      19.2 +/-    1.11  0.080 / 0.230
G31     165.5          66.7                8.6 +/-    0.98       9.2 +/-    0.98  0.070 / 0.120
G32     38.0           51.2                9.0 +/-    0.65      11.2 +/-    0.65  0.080 / 0.090