PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/12-11:42:30
G01     64.4           31.8                4.6 +/-    1.36       7.7 +/-    1.36  0.040 / 0.030
G07     140.3          25.3                4.7 +/-    2.20       9.1 +/-    2.20  0.040 / 0.030
G11     49.6           25.8                3.5 +/-    1.92       6.7 +/-    1.92  0.050 / 0.070
G13     267.0          36.7                6.4 +/-    1.65       9.8 +/-    1.65  0.070 / 0.080
G15     302.7          13.5                0.9 +/-    1.81       2.4 +/-    1.81  0.070 / 0.100
G17     248.2          75.2                7.2 +/-    0.52       7.4 +/-    0.52  0.110 / 0.080
G18     44.0           14.4                2.8 +/-    1.69       7.1 +/-    1.69  0.040 / 0.030
G19     228.1          42.3                7.3 +/-    1.79      10.3 +/-    1.79  0.050 / 0.050
G28     27.7           58.3                2.9 +/-    0.95       3.3 +/-    0.95  0.090 / 0.120
G30     141.1          58.0                6.2 +/-    0.32       7.2 +/-    0.32  0.070 / 0.110