PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-08:43:10
G01     222.4          13.4                5.5 +/-    2.54      14.2 +/-    2.54  0.040 / 0.070
G03     277.9          68.0                3.4 +/-    0.55       3.7 +/-    0.55  0.040 / 0.070
G09     297.9          12.8                5.1 +/-    3.52      13.3 +/-    3.52  0.030 / 0.040
G14     92.0           19.4                2.7 +/-    1.45       6.1 +/-    1.45  0.030 / 0.040
G16     143.4          49.9                6.1 +/-    0.82       7.7 +/-    0.82  0.100 / 0.180
G22     203.5          66.0                2.1 +/-    0.92       2.3 +/-    0.92  0.100 / 0.200
G23     310.3          39.8                5.0 +/-    1.60       7.3 +/-    1.60  0.160 / 0.390
G26     90.0           55.1                5.1 +/-    0.33       6.1 +/-    0.33  0.230 / 0.380
G31     47.0           28.1                0.8 +/-    0.43       1.4 +/-    0.43  0.040 / 0.080