PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-14:57:40
G01     55.4           28.6                5.0 +/-    1.53       9.1 +/-    1.53  0.040 / 0.070
G06     177.6          20.8              -10.8 +/-   39.00     -23.3 +/-   39.00  0.040 / 0.060
G07     144.2          18.0                8.1 +/-    1.12      18.8 +/-    1.12  0.060 / 0.120
G11     46.1           19.2                5.1 +/-    0.75      11.5 +/-    0.75  0.050 / 0.120
G13     256.7          33.4                8.1 +/-    1.73      13.2 +/-    1.73  0.120 / 0.240
G15     292.3          15.2                5.8 +/-    1.16      14.2 +/-    1.16  0.100 / 0.250
G17     283.8          78.9                8.8 +/-    0.79       9.0 +/-    0.79  0.040 / 0.060
G19     236.9          51.6               10.1 +/-    1.04      12.5 +/-    1.04  0.030 / 0.040
G28     43.0           55.2                7.2 +/-    0.61       8.5 +/-    0.61  0.070 / 0.250
G30     147.0          48.8                8.8 +/-    0.61      11.3 +/-    0.61  0.090 / 0.220