PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/13-13:12:40
G01     111.1          23.0                5.7 +/-    1.95      11.6 +/-    1.95  0.210 / 0.310
G07     101.5          58.4                6.1 +/-    0.48       7.0 +/-    0.48  0.330 / 0.400
G08     42.3           22.3                4.2 +/-    1.74       8.7 +/-    1.74  0.030 / 0.020
G09     174.0          15.8                6.1 +/-    2.17      14.9 +/-    2.17  0.030 / 0.020
G11     92.5           40.5                4.1 +/-    0.55       6.0 +/-    0.55  0.030 / 0.040
G13     314.1          23.9                2.5 +/-    2.02       5.1 +/-    2.02  0.040 / 0.040
G17     203.5          35.8                6.3 +/-    1.34       9.8 +/-    1.34  0.070 / 0.170
G28     309.4          59.9                3.0 +/-    0.70       3.4 +/-    0.70  0.090 / 0.210
G30     359.5          73.7                4.5 +/-    0.52       4.7 +/-    0.52  0.080 / 0.160