PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-09:13:10
G01     315.6          24.5                4.2 +/-    2.23       8.4 +/-    2.23  0.090 / 0.150
G10     91.7           48.4                5.4 +/-    0.26       6.9 +/-    0.26  0.090 / 0.180
G11     296.1          25.6                5.2 +/-    1.75      10.0 +/-    1.75  0.040 / 0.050
G14     309.2          69.5                3.5 +/-    0.66       3.7 +/-    0.66  0.040 / 0.050
G18     296.3          44.9                5.0 +/-    1.28       6.8 +/-    1.28  0.110 / 0.200
G22     305.7          20.1                3.6 +/-    1.77       7.8 +/-    1.77  0.120 / 0.260
G25     94.5           12.1                2.9 +/-    2.43       7.8 +/-    2.43  0.030 / 0.040
G31     171.0          53.3                5.5 +/-    1.01       6.6 +/-    1.01  0.040 / 0.050
G32     24.1           60.0                4.0 +/-    0.67       4.5 +/-    0.67  0.130 / 0.200