PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/26-20:43:00
G01     50.4           25.6               24.8 +/-    1.15      47.7 +/-    1.15  0.030 / 0.060
G06     179.2          21.9               18.4 +/-    1.76      38.7 +/-    1.76  0.030 / 0.060
G11     44.4           15.1               10.2 +/-    1.32      25.3 +/-    1.32  0.050 / 0.080
G13     250.4          31.4               15.2 +/-    0.94      25.8 +/-    0.94  0.050 / 0.090
G15     283.6          16.0               13.2 +/-    1.80      32.0 +/-    1.80  0.070 / 0.110
G17     312.0          79.2               13.8 +/-    0.95      14.1 +/-    0.95  0.060 / 0.120
G19     244.6          59.6               15.3 +/-    0.74      17.4 +/-    0.74  0.120 / 0.150
G28     44.6           55.9               12.9 +/-    0.75      15.2 +/-    0.75  0.090 / 0.130
G30     148.9          40.5               16.6 +/-    0.63      23.9 +/-    0.63  0.080 / 0.170