PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/28-08:42:40
G01     91.5           31.4                6.3 +/-    0.95      10.7 +/-    0.95  0.040 / 0.100
G07     124.5          45.2                6.8 +/-    1.56       9.2 +/-    1.56  0.040 / 0.060
G11     69.8           39.1                3.3 +/-    0.64       4.9 +/-    0.64  0.040 / 0.060
G13     297.7          34.4                3.8 +/-    1.15       6.1 +/-    1.15  0.040 / 0.050
G17     213.4          54.4                7.4 +/-    1.05       8.8 +/-    1.05  0.040 / 0.050
G19     213.9          27.4                5.5 +/-    1.46      10.2 +/-    1.46  0.040 / 0.040
G28     347.9          61.7                2.5 +/-    0.67       2.8 +/-    0.67  0.080 / 0.110
G30     97.5           76.9                4.3 +/-    0.59       4.4 +/-    0.59  0.070 / 0.130