PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/18-05:27:50
G03     192.8          25.0                5.4 +/-    1.76      10.6 +/-    1.76  0.090 / 0.090
G07     288.2          37.7                4.3 +/-    1.78       6.5 +/-    1.78  0.070 / 0.090
G08     146.1          24.0                6.4 +/-    1.76      12.8 +/-    1.76  0.050 / 0.070
G09     321.4          60.7                3.5 +/-    1.67       4.0 +/-    1.67  0.060 / 0.080
G16     44.2           40.1                2.9 +/-    1.04       4.3 +/-    1.04  0.030 / 0.030
G22     179.8          10.3                4.0 +/-    1.88      11.0 +/-    1.88  0.030 / 0.030
G23     102.9          80.3                3.2 +/-    0.39       3.2 +/-    0.39  0.090 / 0.160
G26     43.6           13.6                1.6 +/-    1.83       4.2 +/-    1.83  0.090 / 0.190
G27     103.9          31.9                6.9 +/-    1.04      11.6 +/-    1.04  0.140 / 0.370