PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/25-23:12:40
G07     306.3          46.0                8.2 +/-    1.02      10.8 +/-    1.02  0.090 / 0.660
G08     129.8          40.2               10.8 +/-    0.50      15.7 +/-    0.50  0.150 / 0.530
G09     305.7          77.2                7.9 +/-    0.76       8.0 +/-    0.76  0.030 / 0.040
G16     41.8           26.3                6.0 +/-    1.10      11.4 +/-    1.10  0.040 / 0.050
G23     143.6          63.6               10.2 +/-    0.87      11.2 +/-    0.87  0.030 / 0.060
G27     78.6           36.9                7.4 +/-    0.66      11.3 +/-    0.66  0.050 / 0.070
G28     224.0          12.9                8.5 +/-    2.80      22.3 +/-    2.80  0.040 / 0.090
G30     287.0          24.7                8.9 +/-    1.05      17.6 +/-    1.05  0.050 / 0.090