PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/27-13:28:00
G02     280.1          81.4                4.4 +/-    1.07       4.4 +/-    1.07  0.050 / 0.110
G05     170.6          21.9                6.8 +/-    1.05      14.3 +/-    1.05  0.040 / 0.110
G06     39.4           53.1                4.1 +/-    0.26       5.0 +/-    0.26  0.020 / 0.050
G12     320.1          59.2                4.3 +/-    0.93       4.9 +/-    0.93  0.020 / 0.040
G17     79.0           15.7                5.0 +/-    2.13      12.3 +/-    2.13  0.100 / 0.130
G19     66.6           32.1                5.4 +/-    0.82       9.0 +/-    0.82  0.080 / 0.110
G24     238.9          30.2                6.8 +/-    1.99      11.8 +/-    1.99  0.080 / 0.250
G25     317.8          21.0                2.0 +/-    2.33       4.4 +/-    2.33  0.080 / 0.190