PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-12:57:40
G01     224.0          15.6                4.4 +/-    1.66      10.9 +/-    1.66  0.130 / 0.190
G03     269.2          72.4                4.7 +/-    0.73       4.9 +/-    0.73  0.150 / 0.230
G14     88.5           22.3                4.1 +/-    1.73       8.5 +/-    1.73  0.100 / 0.310
G16     148.6          45.1                7.9 +/-    0.99      10.7 +/-    0.99  0.100 / 0.290
G22     201.7          66.5                5.1 +/-    0.43       5.5 +/-    0.43  0.030 / 0.050
G23     309.2          39.3                4.2 +/-    0.88       6.1 +/-    0.88  0.040 / 0.040
G26     97.4           55.2                5.1 +/-    0.43       6.1 +/-    0.43  0.030 / 0.040
G31     46.1           30.7                3.1 +/-    0.75       5.4 +/-    0.75  0.040 / 0.040