PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/30-10:27:50
G01     65.0           32.0                4.0 +/-    0.36       6.8 +/-    0.36  0.040 / 0.040
G07     140.0          25.6                6.8 +/-    1.15      13.0 +/-    1.15  0.050 / 0.050
G11     49.8           26.1                4.2 +/-    0.88       8.1 +/-    0.88  0.060 / 0.080
G13     267.7          36.9                6.8 +/-    1.36      10.5 +/-    1.36  0.060 / 0.090
G15     302.3          13.9                1.3 +/-    2.29       3.3 +/-    2.29  0.050 / 0.120
G17     246.9          75.2                7.3 +/-    0.76       7.5 +/-    0.76  0.050 / 0.120
G18     44.2           14.4                1.2 +/-    1.39       2.9 +/-    1.39  0.080 / 0.120
G19     227.6          42.2                7.0 +/-    1.67       9.9 +/-    1.67  0.080 / 0.120
G28     26.3           58.5                4.6 +/-    0.96       5.3 +/-    0.96  0.130 / 0.300
G30     140.6          58.7                7.3 +/-    0.82       8.4 +/-    0.82  0.100 / 0.260