PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/23-08:12:40
G07     318.9          53.1                5.5 +/-    0.50       6.7 +/-    0.50  0.040 / 0.040
G08     124.6          45.2                7.9 +/-    0.54      10.7 +/-    0.54  0.040 / 0.050
G09     253.7          83.4                8.8 +/-    0.41       8.8 +/-    0.41  0.070 / 0.080
G16     43.5           16.4                2.8 +/-    3.64       6.7 +/-    3.64  0.130 / 0.150
G23     148.8          52.7                7.8 +/-    0.43       9.5 +/-    0.43  0.030 / 0.030
G27     70.1           36.5                6.3 +/-    1.04       9.8 +/-    1.04  0.030 / 0.020
G28     227.3          12.8                3.2 +/-    8.14       8.5 +/-    8.14  0.290 / 0.380
G30     291.6          26.6                6.7 +/-    1.91      12.7 +/-    1.91  0.200 / 0.360