PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-00:12:50
G10     245.3          22.1               14.4 +/-    2.12      30.0 +/-    2.12  0.040 / 0.050
G13     60.0           33.0               11.5 +/-    1.43      18.9 +/-    1.43  0.040 / 0.060
G15     104.5          58.3               14.1 +/-    0.58      16.3 +/-    0.58  0.150 / 0.460
G16     300.7          15.9                7.5 +/-    3.17      18.3 +/-    3.17  0.140 / 0.410
G20     254.1          30.4               11.1 +/-    3.73      19.3 +/-    3.73  0.090 / 0.120
G21     325.2          55.0               11.4 +/-    0.40      13.6 +/-    0.40  0.080 / 0.110
G26     272.6          18.1               10.9 +/-    0.87      25.2 +/-    0.87  0.030 / 0.030
G29     163.2          58.5               14.0 +/-    0.95      16.1 +/-    0.95  0.030 / 0.040