PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-19:57:50
G01     106.3          26.0               14.0 +/-    0.68      26.8 +/-    0.68  0.070 / 0.120
G07     107.8          58.1               13.7 +/-    0.42      15.8 +/-    0.42  0.080 / 0.140
G08     42.3           22.9                9.2 +/-    1.22      19.0 +/-    1.22  0.090 / 0.150
G09     175.1          13.4               18.8 +/-    2.19      48.7 +/-    2.19  0.090 / 0.120
G11     89.8           43.2               13.4 +/-    0.54      18.6 +/-    0.54  0.040 / 0.070
G13     309.2          28.9               11.2 +/-    1.64      20.2 +/-    1.64  0.040 / 0.050
G17     207.4          34.5               16.0 +/-    1.12      25.6 +/-    1.12  0.030 / 0.090
G18     80.0           24.5               12.9 +/-    1.07      25.6 +/-    1.07  0.020 / 0.040
G28     320.3          61.2               12.6 +/-    0.60      14.2 +/-    0.60  0.040 / 0.080
G30     36.0           78.5               13.2 +/-    0.81      13.4 +/-    0.81  0.040 / 0.070