PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-17:58:10
G01     113.7          21.8               10.8 +/-    2.35      22.8 +/-    2.35  0.070 / 0.080
G07     94.2           63.4               10.5 +/-    0.52      11.6 +/-    0.52  0.050 / 0.120
G08     43.5           28.2                8.1 +/-    2.61      14.8 +/-    2.61  0.030 / 0.020
G09     176.1          20.0               12.3 +/-    2.14      27.1 +/-    2.14  0.030 / 0.030
G11     99.7           42.0               10.9 +/-    0.82      15.4 +/-    0.82  0.110 / 0.150
G13     314.4          23.9                9.6 +/-    1.54      19.2 +/-    1.54  0.100 / 0.180
G17     204.3          28.1               13.8 +/-    1.26      25.2 +/-    1.26  0.040 / 0.040
G18     88.1           22.9                9.3 +/-    0.96      19.1 +/-    0.96  0.030 / 0.030
G28     304.8          59.5                9.5 +/-    0.99      10.9 +/-    0.99  0.080 / 0.050
G30     2.4            74.0               10.8 +/-    0.70      11.2 +/-    0.70  0.050 / 0.050