PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-21:27:50
G01     85.0           32.8               13.4 +/-    2.05      22.2 +/-    2.05  0.310 / 0.120
G07     129.3          42.2               15.5 +/-    0.94      21.8 +/-    0.94  0.150 / 0.090
G11     65.6           39.1               12.6 +/-    1.40      18.6 +/-    1.40  0.100 / 0.050
G13     289.9          36.9               13.4 +/-    1.69      20.6 +/-    1.69  0.080 / 0.040
G15     312.1          12.0                9.7 +/-   13.24      26.0 +/-   13.24  0.090 / 0.230
G17     218.7          53.1               14.1 +/-    1.12      17.2 +/-    1.12  0.090 / 0.450
G18     60.0           23.1               11.4 +/-    1.08      23.4 +/-    1.08  0.030 / 0.010
G19     216.8          30.4               16.8 +/-    1.62      29.2 +/-    1.62  0.030 / 0.010
G28     358.6          61.3               12.5 +/-    0.94      14.0 +/-    0.94  0.040 / 0.020
G30     118.2          70.6               15.0 +/-    0.88      15.8 +/-    0.88  0.040 / 0.020