PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-18:12:50
G01     121.4          15.4               10.9 +/-    0.95      26.7 +/-    0.95  0.030 / 0.050
G07     83.3           62.9               10.3 +/-    0.67      11.4 +/-    0.67  0.030 / 0.040
G08     46.3           33.9                8.1 +/-    0.60      13.2 +/-    0.60  0.090 / 0.230
G09     178.1          30.8               11.8 +/-    1.22      20.4 +/-    1.22  0.080 / 0.190
G11     109.5          39.2               12.1 +/-    0.99      17.8 +/-    0.99  0.050 / 0.060
G13     318.8          17.6                8.3 +/-    1.47      19.4 +/-    1.47  0.040 / 0.080
G17     200.3          21.4               12.1 +/-    1.37      25.6 +/-    1.37  0.050 / 0.110
G18     95.5           19.4               10.2 +/-    0.92      22.9 +/-    0.92  0.050 / 0.110
G28     280.5          52.7               11.6 +/-    0.49      14.2 +/-    0.49  0.140 / 0.220
G30     344.6          67.4                8.6 +/-    0.66       9.3 +/-    0.66  0.100 / 0.240