PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-14:42:50
G03     227.4          66.7               11.3 +/-    0.77      12.2 +/-    0.77  0.190 / 0.400
G09     304.3          19.0                8.4 +/-    1.43      18.9 +/-    1.43  0.190 / 0.420
G14     100.0          16.5                8.3 +/-    1.12      19.8 +/-    1.12  0.050 / 0.060
G16     120.2          60.5               13.4 +/-    1.21      15.2 +/-    1.21  0.040 / 0.060
G22     187.4          49.6               13.2 +/-    1.32      16.7 +/-    1.32  0.040 / 0.060
G23     325.0          54.7                9.6 +/-    0.59      11.5 +/-    0.59  0.040 / 0.050
G26     64.5           49.3                9.6 +/-    0.44      12.2 +/-    0.44  0.050 / 0.040
G31     53.8           16.5                7.1 +/-    1.50      17.1 +/-    1.50  0.050 / 0.050