PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/23-10:27:50
G01     48.9           24.4                2.9 +/-    0.50       5.8 +/-    0.50  0.030 / 0.030
G06     179.2          24.7                7.2 +/-    1.22      14.1 +/-    1.22  0.030 / 0.020
G11     44.1           12.7                1.1 +/-    1.73       2.8 +/-    1.73  0.100 / 0.320
G13     250.9          29.5                8.6 +/-    1.83      15.2 +/-    1.83  0.120 / 0.330
G15     282.6          15.6                4.9 +/-    2.62      12.0 +/-    2.62  0.040 / 0.060
G17     333.0          77.8                4.9 +/-    0.53       5.0 +/-    0.53  0.040 / 0.070
G19     251.1          63.0                5.5 +/-    1.06       6.1 +/-    1.06  0.130 / 0.200
G28     55.6           51.9                3.4 +/-    0.70       4.3 +/-    0.70  0.120 / 0.140
G30     150.2          40.2                7.7 +/-    0.91      11.1 +/-    0.91  0.050 / 0.110