PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-11:13:10
G01     73.4           33.2                3.8 +/-    0.58       6.3 +/-    0.58  0.030 / 0.040
G07     136.1          32.4                5.4 +/-    0.91       9.0 +/-    0.91  0.030 / 0.030
G11     54.4           31.3                2.5 +/-    0.56       4.2 +/-    0.56  0.040 / 0.070
G13     276.9          38.0                4.3 +/-    0.99       6.5 +/-    0.99  0.050 / 0.050
G15     309.1          11.8                1.3 +/-    1.45       3.6 +/-    1.45  0.040 / 0.070
G17     229.9          68.7                4.0 +/-    0.61       4.3 +/-    0.61  0.040 / 0.080
G18     49.8           18.4                1.8 +/-    1.32       4.0 +/-    1.32  0.260 / 0.270
G19     222.4          35.2                6.6 +/-    1.13      10.5 +/-    1.13  0.050 / 0.060
G28     13.8           60.1                2.4 +/-    0.66       2.8 +/-    0.66  0.070 / 0.190
G30     133.0          65.7                3.8 +/-    0.61       4.1 +/-    0.61  0.070 / 0.190