PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-18:42:30
G01     230.3          20.7               10.1 +/-    1.50      21.9 +/-    1.50  0.030 / 0.040
G03     294.4          66.9                8.6 +/-    0.76       9.3 +/-    0.76  0.030 / 0.040
G14     81.5           28.5                8.2 +/-    0.84      14.9 +/-    0.84  0.070 / 0.090
G16     151.8          39.6               12.3 +/-    1.16      17.9 +/-    1.16  0.050 / 0.100
G22     226.9          74.0                9.5 +/-    0.66       9.9 +/-    0.66  0.040 / 0.080
G23     304.1          34.8                9.7 +/-    1.59      15.5 +/-    1.59  0.040 / 0.080
G26     106.2          52.8                9.7 +/-    0.44      11.9 +/-    0.44  0.080 / 0.160
G31     43.5           36.3                6.7 +/-    0.72      10.3 +/-    0.72  0.080 / 0.210