PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-14:42:30
G03     227.4          66.7               11.4 +/-    0.70      12.3 +/-    0.70  0.030 / 0.040
G09     304.3          19.0                7.7 +/-    3.14      17.4 +/-    3.14  0.030 / 0.030
G14     100.0          16.5                8.3 +/-    1.90      19.9 +/-    1.90  0.110 / 0.260
G16     120.2          60.5               12.1 +/-    0.49      13.7 +/-    0.49  0.160 / 0.310
G22     187.4          49.6               12.7 +/-    0.73      16.1 +/-    0.73  0.040 / 0.050
G23     325.0          54.7                9.6 +/-    0.32      11.4 +/-    0.32  0.050 / 0.050
G26     64.5           49.3                9.2 +/-    0.42      11.7 +/-    0.42  0.060 / 0.060
G31     53.8           16.5                7.6 +/-    2.08      18.3 +/-    2.08  0.060 / 0.060