PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-11:57:50
G01     65.0           31.8                4.0 +/-    0.58       6.8 +/-    0.58  0.040 / 0.130
G06     182.1          10.2              -17.1 +/-   25.04     -47.4 +/-   25.04  0.090 / 0.150
G07     139.9          24.5                5.1 +/-    1.49      10.0 +/-    1.49  0.040 / 0.030
G11     50.1           25.4                3.5 +/-    0.67       6.7 +/-    0.67  0.030 / 0.040
G13     270.8          36.1                6.9 +/-    1.14      10.8 +/-    1.14  0.110 / 0.340
G15     299.4          15.7                2.5 +/-    2.36       6.1 +/-    2.36  0.100 / 0.400
G17     248.1          75.7                5.9 +/-    0.62       6.0 +/-    0.62  0.050 / 0.070
G19     228.6          48.5                7.3 +/-    1.21       9.4 +/-    1.21  0.050 / 0.080
G28     28.8           57.8                2.5 +/-    0.52       2.9 +/-    0.52  0.130 / 0.330
G30     139.6          58.3                4.7 +/-    0.74       5.4 +/-    0.74  0.130 / 0.310