PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/13-13:42:50
G01     101.7          27.2                7.8 +/-    0.72      14.5 +/-    0.72  0.040 / 0.060
G07     114.5          51.1               10.5 +/-    0.56      13.0 +/-    0.56  0.060 / 0.060
G08     41.8           19.2                7.7 +/-    1.74      17.3 +/-    1.74  0.060 / 0.080
G09     174.5          11.0                7.0 +/-    1.64      19.0 +/-    1.64  0.060 / 0.070
G11     82.7           43.5                9.6 +/-    0.68      13.3 +/-    0.68  0.060 / 0.050
G13     305.5          32.2                7.7 +/-    2.04      12.9 +/-    2.04  0.030 / 0.050
G17     207.5          39.1                9.4 +/-    0.51      13.8 +/-    0.51  0.050 / 0.080
G18     74.7           24.4                9.4 +/-    1.44      18.7 +/-    1.44  0.050 / 0.070
G28     314.0          59.5                7.5 +/-    1.09       8.5 +/-    1.09  0.260 / 0.430
G30     53.9           79.5                8.3 +/-    0.73       8.5 +/-    0.73  0.310 / 0.490