PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/15-10:12:40
G01     70.9           32.8                2.9 +/-    1.00       4.8 +/-    1.00  0.040 / 0.050
G07     137.2          29.6                4.3 +/-    0.99       7.7 +/-    0.99  0.030 / 0.050
G11     53.5           29.5                2.0 +/-    0.46       3.5 +/-    0.46  0.030 / 0.030
G13     277.0          36.9                4.9 +/-    1.00       7.5 +/-    1.00  0.040 / 0.030
G15     303.3          15.2                0.6 +/-    3.58       1.5 +/-    3.58  0.050 / 0.100
G17     234.5          71.2                5.1 +/-    0.80       5.4 +/-    0.80  0.050 / 0.110
G19     224.2          43.6                6.1 +/-    0.94       8.4 +/-    0.94  0.110 / 0.300
G28     20.2           59.1                3.1 +/-    0.42       3.6 +/-    0.42  0.110 / 0.290
G30     134.5          62.7                4.3 +/-    1.26       4.8 +/-    1.26  0.050 / 0.080