PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-17:43:10
G07     345.8          62.1               11.4 +/-    0.47      12.7 +/-    0.47  0.050 / 0.040
G08     95.2           51.7               12.2 +/-    0.95      15.1 +/-    0.95  0.040 / 0.040
G09     192.6          73.4               12.3 +/-    0.43      12.8 +/-    0.43  0.180 / 0.230
G11     143.7          15.0               11.5 +/-    2.35      28.5 +/-    2.35  0.080 / 0.220
G16     47.0           9.4                 8.2 +/-    2.31      23.2 +/-    2.31  0.070 / 0.070
G23     156.1          40.7               11.9 +/-    0.61      17.1 +/-    0.61  0.070 / 0.060
G27     55.4           32.3                9.5 +/-    0.99      15.9 +/-    0.99  0.060 / 0.090
G28     236.9          26.5               12.3 +/-    2.39      23.3 +/-    2.39  0.060 / 0.100
G30     303.7          37.2               10.4 +/-    1.11      15.9 +/-    1.11  0.050 / 0.030