PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-14:27:50
G02     201.9          26.4               11.6 +/-    1.66      21.9 +/-    1.66  0.030 / 0.050
G06     168.3          61.2               11.7 +/-    0.64      13.1 +/-    0.64  0.020 / 0.050
G12     304.0          10.2               -8.9 +/-    6.41     -24.8 +/-    6.41  0.090 / 0.310
G17     32.5           52.2                7.8 +/-    0.89       9.6 +/-    0.89  0.030 / 0.040
G19     351.2          68.2                7.0 +/-    0.57       7.4 +/-    0.57  0.040 / 0.040
G24     306.1          33.1                6.7 +/-    2.79      11.0 +/-    2.79  0.070 / 0.110
G28     96.3           35.1                9.3 +/-    0.57      14.7 +/-    0.57  0.070 / 0.120