PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/30-14:12:50
G03     239.3          69.3                9.0 +/-    0.49       9.5 +/-    0.49  0.140 / 0.250
G09     301.9          16.0                5.9 +/-    1.99      14.4 +/-    1.99  0.090 / 0.230
G14     96.4           19.5                7.5 +/-    1.18      16.8 +/-    1.18  0.040 / 0.060
G16     128.2          57.6               10.3 +/-    0.47      12.0 +/-    0.47  0.040 / 0.060
G22     189.4          54.3                8.6 +/-    0.80      10.3 +/-    0.80  0.030 / 0.040
G23     321.5          51.6                8.1 +/-    1.07      10.0 +/-    1.07  0.030 / 0.040
G26     70.7           51.4                7.9 +/-    0.67       9.8 +/-    0.67  0.050 / 0.060
G31     51.6           19.6                6.6 +/-    1.61      14.6 +/-    1.61  0.050 / 0.050