PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/16-21:58:00
G01     61.8           31.2               11.0 +/-    0.83      18.8 +/-    0.83  0.130 / 0.090
G07     141.6          24.2               12.5 +/-    1.42      24.9 +/-    1.42  0.140 / 0.100
G11     49.8           26.4                8.5 +/-    2.12      16.2 +/-    2.12  0.080 / 0.040
G13     264.9          35.7               14.7 +/-    1.80      23.1 +/-    1.80  0.080 / 0.030
G15     295.2          16.4               11.5 +/-    1.62      27.7 +/-    1.62  0.100 / 0.280
G17     246.7          70.6               11.8 +/-    0.68      12.4 +/-    0.68  0.100 / 0.260
G18     43.7           14.2                8.7 +/-    2.22      22.0 +/-    2.22  0.040 / 0.020
G19     231.0          48.5               12.6 +/-    2.23      16.2 +/-    2.23  0.040 / 0.010
G28     33.9           57.0               13.0 +/-    0.73      15.2 +/-    0.73  0.080 / 0.060
G30     142.2          52.0               12.6 +/-    0.66      15.5 +/-    0.66  0.100 / 0.100