PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/17-15:12:30
G03     229.2          67.4               10.8 +/-    0.60      11.6 +/-    0.60  0.130 / 0.270
G09     303.5          18.0                8.8 +/-    1.02      20.3 +/-    1.02  0.100 / 0.250
G14     99.1           17.1                8.5 +/-    2.47      20.1 +/-    2.47  0.040 / 0.050
G16     123.1          59.7               11.1 +/-    0.52      12.7 +/-    0.52  0.040 / 0.050
G22     188.5          51.4               12.2 +/-    0.81      15.1 +/-    0.81  0.030 / 0.040
G23     323.5          53.3                9.5 +/-    0.54      11.5 +/-    0.54  0.030 / 0.040
G26     66.3           50.0                9.1 +/-    0.90      11.4 +/-    0.90  0.060 / 0.060
G31     53.1           17.5                6.9 +/-    3.91      16.1 +/-    3.91  0.060 / 0.060