PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-10:57:30
G01     95.7           30.2                5.7 +/-    1.04       9.9 +/-    1.04  0.070 / 0.120
G07     120.9          47.6                7.1 +/-    0.87       9.2 +/-    0.87  0.070 / 0.130
G08     41.9           10.0                3.6 +/-    2.41       9.9 +/-    2.41  0.040 / 0.030
G11     73.5           39.7                5.1 +/-    0.87       7.4 +/-    0.87  0.030 / 0.020
G13     301.9          32.6                4.5 +/-    1.66       7.4 +/-    1.66  0.030 / 0.040
G17     210.7          51.0                7.4 +/-    0.76       9.2 +/-    0.76  0.040 / 0.040
G19     212.3          24.1                6.9 +/-    2.36      13.8 +/-    2.36  0.030 / 0.040
G28     340.0          61.8                5.9 +/-    0.39       6.6 +/-    0.39  0.030 / 0.040
G30     75.2           79.5                6.5 +/-    0.80       6.6 +/-    0.80  0.060 / 0.090