PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/11-02:57:50
G02     200.4          23.9                5.6 +/-    2.68      11.3 +/-    2.68  0.040 / 0.080
G06     174.9          53.0                5.3 +/-    1.14       6.4 +/-    1.14  0.040 / 0.060
G13     224.6          11.5                4.4 +/-    1.47      11.8 +/-    1.47  0.050 / 0.040
G17     27.7           55.8                3.2 +/-    0.89       3.8 +/-    0.89  0.040 / 0.030
G19     328.0          70.5                2.8 +/-    1.03       2.9 +/-    1.03  0.070 / 0.110
G24     306.2          33.8                1.4 +/-    2.04       2.3 +/-    2.04  0.080 / 0.090
G28     88.7           40.8                3.8 +/-    1.28       5.5 +/-    1.28  0.040 / 0.020
G30     157.5          12.5                4.3 +/-    2.37      11.4 +/-    2.37  0.040 / 0.030