PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/25-17:27:50
G01     117.9          18.9               13.6 +/-    0.88      30.8 +/-    0.88  0.050 / 0.080
G07     83.5           66.2               13.0 +/-    0.23      14.0 +/-    0.23  0.040 / 0.080
G08     44.9           32.1               11.0 +/-    0.41      18.5 +/-    0.41  0.020 / 0.040
G09     176.7          24.5               13.6 +/-    1.20      27.0 +/-    1.20  0.030 / 0.040
G11     105.9          40.5               13.9 +/-    0.74      20.0 +/-    0.74  0.030 / 0.030
G13     317.0          20.4               11.9 +/-    3.99      25.9 +/-    3.99  0.040 / 0.040
G17     202.9          23.6               13.5 +/-    2.48      27.3 +/-    2.48  0.050 / 0.090
G18     93.1           21.4               12.0 +/-    0.99      25.6 +/-    0.99  0.050 / 0.080
G28     295.7          58.0               12.1 +/-    1.08      14.0 +/-    1.08  0.090 / 0.160
G30     350.8          70.2               12.8 +/-    0.56      13.5 +/-    0.56  0.080 / 0.190