PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/17-09:27:30
G01     91.5           31.4                4.5 +/-    1.14       7.7 +/-    1.14  0.030 / 0.050
G07     124.5          45.0                4.9 +/-    2.07       6.6 +/-    2.07  0.040 / 0.060
G11     69.5           38.9                2.5 +/-    0.66       3.8 +/-    0.66  0.050 / 0.060
G13     297.8          34.3                3.7 +/-    1.05       6.0 +/-    1.05  0.050 / 0.060
G17     213.3          54.6                5.6 +/-    0.76       6.7 +/-    0.76  0.040 / 0.050
G19     213.9          27.5                3.8 +/-    1.20       7.0 +/-    1.20  0.040 / 0.050
G28     347.9          61.7                2.5 +/-    0.81       2.8 +/-    0.81  0.080 / 0.110
G30     96.5           77.2                3.5 +/-    1.28       3.6 +/-    1.28  0.070 / 0.120