PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-15:13:00
G03     213.1          59.9               11.9 +/-    0.67      13.5 +/-    0.67  0.080 / 0.440
G07     254.4          12.7                9.0 +/-    4.92      23.6 +/-    4.92  0.080 / 0.470
G09     308.6          25.0                9.5 +/-    1.86      18.5 +/-    1.86  0.030 / 0.060
G14     106.3          11.2                8.0 +/-    2.53      21.8 +/-    2.53  0.040 / 0.060
G16     101.3          63.8               11.3 +/-    0.97      12.5 +/-    0.97  0.040 / 0.060
G22     184.9          41.3               10.9 +/-    1.50      15.5 +/-    1.50  0.040 / 0.060
G23     332.6          61.1                9.9 +/-    0.62      11.2 +/-    0.62  0.200 / 0.420
G26     55.4           44.2                9.2 +/-    1.39      12.6 +/-    1.39  0.170 / 0.420
G31     58.1           10.8                8.6 +/-    1.89      23.5 +/-    1.89  0.040 / 0.030