PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-15:12:50
G01     316.7          22.6                7.1 +/-    2.09      14.6 +/-    2.09  0.130 / 0.300
G10     88.3           50.2                7.0 +/-    0.95       8.7 +/-    0.95  0.210 / 0.240
G11     300.1          23.7                6.3 +/-    0.94      12.7 +/-    0.94  0.210 / 0.220
G14     311.2          70.5                7.5 +/-    0.46       7.9 +/-    0.46  0.190 / 0.210
G22     304.0          16.2                5.3 +/-    2.82      12.8 +/-    2.82  0.050 / 0.050
G25     96.7           11.1               10.6 +/-    2.14      28.9 +/-    2.14  0.030 / 0.050
G31     173.7          49.4               11.2 +/-    0.91      14.2 +/-    0.91  0.040 / 0.040
G32     19.1           62.6                7.6 +/-    0.98       8.4 +/-    0.98  0.040 / 0.050