PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/28-08:27:50
G01     230.2          22.0                7.4 +/-    2.74      15.5 +/-    2.74  0.040 / 0.040
G03     300.2          64.7                5.1 +/-    0.92       5.5 +/-    0.92  0.030 / 0.040
G14     79.8           28.6                5.2 +/-    1.42       9.4 +/-    1.42  0.050 / 0.030
G16     152.2          37.4                7.3 +/-    1.04      11.1 +/-    1.04  0.040 / 0.040
G18     206.4          11.1                4.3 +/-    4.33      11.8 +/-    4.33  0.160 / 0.150
G22     235.9          74.6                6.6 +/-    0.35       6.8 +/-    0.35  0.090 / 0.240
G23     304.0          35.6                5.4 +/-    0.98       8.5 +/-    0.98  0.110 / 0.150
G26     110.8          52.0                8.0 +/-    0.68       9.8 +/-    0.68  0.090 / 0.150
G31     43.5           37.1                3.3 +/-    1.11       5.0 +/-    1.11  0.180 / 0.520
G32     93.0           11.9                4.0 +/-    2.04      10.8 +/-    2.04  0.180 / 0.400