PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-17:13:10
G01     127.5          11.3               -3.6 +/-   48.59      -9.8 +/-   48.59  0.030 / 0.040
G07     49.7           69.8               12.2 +/-    0.37      12.9 +/-    0.37  0.030 / 0.040
G08     52.1           41.9               10.8 +/-    0.46      15.3 +/-    0.46  0.040 / 0.060
G09     178.3          36.7               14.6 +/-    1.26      22.5 +/-    1.26  0.050 / 0.050
G11     119.9          34.8               13.9 +/-    1.24      22.1 +/-    1.24  0.030 / 0.040
G13     321.3          11.0               -3.4 +/-   24.20      -9.3 +/-   24.20  0.030 / 0.040
G17     200.8          11.9               13.8 +/-   25.98      36.9 +/-   25.98  0.080 / 0.120
G18     104.7          16.3               12.1 +/-    1.62      29.2 +/-    1.62  0.080 / 0.130
G28     275.6          52.7               14.0 +/-    1.14      17.1 +/-    1.14  0.070 / 0.090
G30     333.3          60.6               11.1 +/-    0.99      12.6 +/-    0.99  0.070 / 0.110