PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/23-02:13:20
G08     297.2          21.6                6.5 +/-    2.05      13.7 +/-    2.05  0.050 / 0.070
G10     9.8            62.7                5.7 +/-    0.96       6.4 +/-    0.96  0.060 / 0.070
G14     228.7          45.2                7.6 +/-    1.74      10.2 +/-    1.74  0.090 / 0.100
G20     64.2           52.9                8.0 +/-    0.79       9.7 +/-    0.79  0.120 / 0.150
G21     146.6          41.7                7.9 +/-    0.99      11.2 +/-    0.99  0.050 / 0.120
G24     57.1           26.1                6.1 +/-    2.32      11.7 +/-    2.32  0.080 / 0.130
G27     255.6          32.3                5.8 +/-    2.68       9.7 +/-    2.68  0.030 / 0.030
G32     243.3          66.3                5.9 +/-    0.52       6.3 +/-    0.52  0.040 / 0.020