PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/21-13:58:10
G01     70.2           32.6                8.0 +/-    1.46      13.3 +/-    1.46  0.030 / 0.050
G07     137.4          27.9                9.4 +/-    1.43      17.3 +/-    1.43  0.030 / 0.040
G11     52.5           28.0                6.0 +/-    1.69      11.0 +/-    1.69  0.050 / 0.110
G13     276.6          36.8                8.5 +/-    1.12      13.0 +/-    1.12  0.050 / 0.130
G15     304.5          14.4                3.4 +/-    2.93       8.6 +/-    2.93  0.090 / 0.110
G17     235.9          72.1                9.7 +/-    0.63      10.2 +/-    0.63  0.070 / 0.110
G19     224.6          44.4               13.1 +/-    2.22      17.9 +/-    2.22  0.030 / 0.040
G28     20.5           59.0                8.0 +/-    0.49       9.1 +/-    0.49  0.030 / 0.040
G30     134.8          63.6                8.5 +/-    0.63       9.4 +/-    0.63  0.070 / 0.090