PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-21:13:10
G01     40.0           14.6               10.7 +/-    1.03      26.8 +/-    1.03  0.100 / 0.310
G02     199.2          10.9                4.7 +/-   23.49      12.9 +/-   23.49  0.150 / 0.330
G06     173.6          42.5               14.2 +/-    1.04      19.8 +/-    1.04  0.120 / 0.320
G13     235.8          20.4               15.8 +/-    1.05      34.4 +/-    1.05  0.100 / 0.260
G15     269.1          11.4               12.5 +/-    3.42      33.9 +/-    3.42  0.190 / 0.360
G17     357.5          70.5               12.8 +/-    0.84      13.5 +/-    0.84  0.210 / 0.370
G19     281.9          69.1               12.6 +/-    0.64      13.4 +/-    0.64  0.050 / 0.080
G24     315.6          21.4               10.7 +/-    3.25      22.7 +/-    3.25  0.050 / 0.070
G28     75.1           45.4               13.4 +/-    0.63      18.0 +/-    0.63  0.150 / 0.270
G30     155.0          24.2               15.2 +/-    2.42      30.3 +/-    2.42  0.120 / 0.190