PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/22-19:27:40
G07     356.5          64.4               12.4 +/-    0.57      13.6 +/-    0.57  0.040 / 0.040
G08     83.1           51.7               13.1 +/-    0.71      16.2 +/-    0.71  0.030 / 0.040
G09     185.3          66.2               12.2 +/-    0.42      13.2 +/-    0.42  0.080 / 0.140
G11     139.3          19.1               13.0 +/-    1.70      29.1 +/-    1.70  0.100 / 0.140
G23     158.1          34.7               12.1 +/-    0.94      19.3 +/-    0.94  0.030 / 0.030
G27     49.9           28.8               10.3 +/-    1.99      18.4 +/-    1.99  0.030 / 0.030
G28     242.2          31.8               13.5 +/-    1.69      22.8 +/-    1.69  0.090 / 0.090
G30     308.5          41.0               11.4 +/-    1.32      16.4 +/-    1.32  0.060 / 0.110