PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-14:12:30
G02     204.9          38.7                8.6 +/-    0.86      12.8 +/-    0.86  0.090 / 0.210
G03     54.6           9.5                 7.2 +/-    1.67      20.4 +/-    1.67  0.090 / 0.220
G06     154.3          73.4                7.6 +/-    0.67       7.9 +/-    0.67  0.070 / 0.080
G12     310.3          18.8                6.2 +/-    2.62      14.0 +/-    2.62  0.110 / 0.060
G17     42.8           43.5                4.8 +/-    1.50       6.6 +/-    1.50  0.100 / 0.120
G19     15.3           61.0                5.1 +/-    0.60       5.8 +/-    0.60  0.090 / 0.180
G24     294.3          39.2                5.2 +/-    2.89       7.6 +/-    2.89  0.040 / 0.020
G28     107.6          27.4                7.8 +/-    1.42      14.4 +/-    1.42  0.030 / 0.020