PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-17:27:50
G01     299.5          37.3                7.3 +/-    2.78      11.1 +/-    2.78  0.070 / 0.100
G03     309.6          13.2                7.1 +/-    4.04      18.5 +/-    4.04  0.050 / 0.090
G10     113.6          34.7                8.7 +/-    1.18      13.9 +/-    1.18  0.040 / 0.050
G11     275.5          27.2                8.1 +/-    1.39      15.1 +/-    1.39  0.040 / 0.050
G14     10.4           63.4                5.9 +/-    0.64       6.5 +/-    0.64  0.090 / 0.130
G22     312.3          32.9                5.6 +/-    0.95       9.3 +/-    0.95  0.090 / 0.130
G25     74.8           18.5                8.4 +/-    1.08      19.1 +/-    1.08  0.020 / 0.020
G31     155.0          73.3                7.4 +/-    0.96       7.7 +/-    0.96  0.030 / 0.030
G32     44.4           46.7                6.9 +/-    1.00       9.0 +/-    1.00  0.080 / 0.080