PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-13:12:50
G01     219.4          10.9                4.7 +/-    1.14      12.9 +/-    1.14  0.050 / 0.030
G03     244.2          71.8                7.1 +/-    0.47       7.5 +/-    0.47  0.030 / 0.040
G09     298.8          12.2                2.3 +/-   16.71       6.1 +/-   16.71  0.180 / 0.380
G14     94.1           18.1                5.6 +/-    1.48      13.0 +/-    1.48  0.190 / 0.350
G16     142.0          51.6                8.3 +/-    0.75      10.3 +/-    0.75  0.040 / 0.060
G22     194.6          59.6                6.9 +/-    0.90       7.9 +/-    0.90  0.040 / 0.040
G23     314.3          44.3                5.1 +/-    1.01       7.0 +/-    1.01  0.090 / 0.260
G26     84.3           55.2                6.2 +/-    1.29       7.3 +/-    1.29  0.090 / 0.250
G31     49.0           25.1                5.8 +/-    1.79      11.4 +/-    1.79  0.040 / 0.050