PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/22-11:58:00
G07     338.1          59.8                5.5 +/-    0.60       6.2 +/-    0.60  0.100 / 0.090
G08     91.8           52.2                7.5 +/-    0.67       9.2 +/-    0.67  0.090 / 0.100
G09     183.1          68.4                7.3 +/-    0.33       7.8 +/-    0.33  0.040 / 0.040
G11     143.0          15.6                4.0 +/-    2.92       9.8 +/-    2.92  0.030 / 0.040
G23     156.4          37.3                6.9 +/-    0.94      10.5 +/-    0.94  0.050 / 0.070
G27     52.1           30.0                5.6 +/-    1.43       9.8 +/-    1.43  0.050 / 0.070
G28     240.0          32.1                7.3 +/-    2.52      12.3 +/-    2.52  0.110 / 0.060
G30     304.1          36.5                6.3 +/-    1.34       9.8 +/-    1.34  0.120 / 0.070