PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-10:58:10
G01     72.7           33.1                4.6 +/-    1.07       7.6 +/-    1.07  0.040 / 0.040
G07     136.5          31.7                6.1 +/-    0.47      10.3 +/-    0.47  0.040 / 0.030
G11     53.9           30.9                3.4 +/-    0.77       5.8 +/-    0.77  0.050 / 0.100
G13     276.1          38.0                4.4 +/-    1.05       6.7 +/-    1.05  0.060 / 0.100
G15     308.3          12.1                1.6 +/-    1.59       4.2 +/-    1.59  0.050 / 0.090
G17     231.1          69.4                5.1 +/-    0.45       5.4 +/-    0.45  0.040 / 0.080
G18     49.2           18.1                1.1 +/-    0.82       2.6 +/-    0.82  0.050 / 0.130
G19     222.8          36.0                5.1 +/-    1.22       7.9 +/-    1.22  0.050 / 0.130
G28     14.9           60.0                3.4 +/-    0.35       3.9 +/-    0.35  0.070 / 0.200
G30     133.8          65.1                4.7 +/-    0.56       5.2 +/-    0.56  0.070 / 0.220