PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/09-09:43:00
G01     41.8           17.0                2.1 +/-    1.99       5.0 +/-    1.99  0.060 / 0.090
G06     177.9          35.5                6.9 +/-    1.88      10.8 +/-    1.88  0.040 / 0.060
G13     240.2          22.8                6.8 +/-    1.49      14.0 +/-    1.49  0.220 / 0.320
G15     271.9          12.9                2.7 +/-    1.27       7.0 +/-    1.27  0.360 / 0.210
G17     4.2            70.1                4.3 +/-    0.54       4.5 +/-    0.54  0.030 / 0.020
G19     278.2          69.9                2.7 +/-    0.49       2.9 +/-    0.49  0.030 / 0.020
G24     317.5          17.1                1.1 +/-    2.45       2.5 +/-    2.45  0.070 / 0.180
G28     71.0           46.9                5.0 +/-    1.11       6.5 +/-    1.11  0.170 / 0.180
G30     154.1          28.4                6.1 +/-    1.06      11.0 +/-    1.06  0.060 / 0.100