PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/14-14:27:50
G02     51.2           39.5                5.5 +/-    0.69       8.1 +/-    0.69  0.030 / 0.040
G05     87.1           69.6                7.4 +/-    0.37       7.9 +/-    0.37  0.020 / 0.030
G12     189.1          46.2               10.2 +/-    1.30      13.5 +/-    1.30  0.170 / 0.340
G20     203.5          45.9               11.1 +/-    1.46      14.8 +/-    1.46  0.210 / 0.260
G21     263.3          13.4                6.5 +/-    3.05      16.8 +/-    3.05  0.050 / 0.060
G25     255.6          57.8                7.6 +/-    1.02       8.8 +/-    1.02  0.030 / 0.060
G29     324.8          49.3                6.2 +/-    1.38       7.9 +/-    1.38  0.040 / 0.080