PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-10:27:50
G01     80.9           33.2                3.9 +/-    0.59       6.4 +/-    0.59  0.040 / 0.040
G07     131.9          37.9                5.8 +/-    0.74       8.8 +/-    0.74  0.030 / 0.040
G11     59.4           35.1                2.6 +/-    0.35       4.2 +/-    0.35  0.030 / 0.070
G13     284.8          37.9                2.7 +/-    1.29       4.0 +/-    1.29  0.060 / 0.080
G17     221.3          63.1                6.2 +/-    0.92       6.8 +/-    0.92  0.070 / 0.120
G18     54.9           20.9                1.2 +/-    1.29       2.5 +/-    1.29  0.090 / 0.090
G19     218.7          29.9                4.8 +/-    2.51       8.5 +/-    2.51  0.070 / 0.120
G28     2.0            61.1                3.8 +/-    0.56       4.3 +/-    0.56  0.080 / 0.140
G30     123.0          71.6                6.5 +/-    0.86       6.8 +/-    0.86  0.080 / 0.260