PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-11:57:50
G01     65.0           31.8                4.6 +/-    1.00       7.7 +/-    1.00  0.050 / 0.090
G07     139.9          24.5                4.2 +/-    1.11       8.4 +/-    1.11  0.080 / 0.090
G11     50.1           25.4                3.2 +/-    1.70       6.2 +/-    1.70  0.060 / 0.090
G13     270.8          36.1                5.3 +/-    1.15       8.2 +/-    1.15  0.150 / 0.110
G15     299.4          15.7                1.3 +/-    2.00       3.1 +/-    2.00  0.110 / 0.170
G17     248.1          75.7                5.5 +/-    0.52       5.7 +/-    0.52  0.110 / 0.210
G19     228.6          48.5                6.3 +/-    2.54       8.1 +/-    2.54  0.030 / 0.030
G28     28.8           57.8                3.8 +/-    1.41       4.4 +/-    1.41  0.030 / 0.030
G30     139.6          58.3                5.3 +/-    0.32       6.1 +/-    0.32  0.020 / 0.020