PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-20:57:50
G01     50.9           26.0               10.3 +/-    1.21      19.8 +/-    1.21  0.040 / 0.050
G06     179.5          21.2               16.5 +/-    2.23      35.3 +/-    2.23  0.030 / 0.060
G11     44.5           15.6                9.7 +/-    2.97      23.8 +/-    2.97  0.060 / 0.070
G13     251.1          31.8               12.1 +/-    1.39      20.5 +/-    1.39  0.050 / 0.060
G15     284.2          16.1               10.6 +/-    1.98      25.6 +/-    1.98  0.080 / 0.100
G17     309.2          79.3               12.0 +/-    0.98      12.2 +/-    0.98  0.060 / 0.120
G19     243.6          59.0               13.3 +/-    0.77      15.3 +/-    0.77  0.090 / 0.170
G28     43.7           56.1               11.3 +/-    0.56      13.3 +/-    0.56  0.080 / 0.160
G30     148.6          41.3               14.1 +/-    0.69      20.1 +/-    0.69  0.080 / 0.160