PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-17:13:10
G07     338.4          60.1               11.4 +/-    0.62      12.9 +/-    0.62  0.030 / 0.040
G08     102.9          50.6               13.8 +/-    0.60      17.3 +/-    0.60  0.040 / 0.050
G09     202.3          77.8               12.1 +/-    0.82      12.4 +/-    0.82  0.070 / 0.080
G11     146.6          12.2               12.7 +/-    3.32      33.7 +/-    3.32  0.070 / 0.070
G16     45.6           12.6                7.5 +/-    3.56      19.7 +/-    3.56  0.030 / 0.030
G23     154.5          45.1               13.6 +/-    0.98      18.3 +/-    0.98  0.030 / 0.020
G27     59.8           34.3               11.6 +/-    1.84      18.6 +/-    1.84  0.110 / 0.190
G28     233.7          22.9               13.7 +/-    2.30      28.0 +/-    2.30  0.140 / 0.160
G30     300.3          34.5               11.1 +/-    1.46      17.7 +/-    1.46  0.080 / 0.100