PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/21-18:28:10
G02     221.6          63.8               10.6 +/-    1.11      11.7 +/-    1.11  0.070 / 0.090
G06     47.3           67.5                8.2 +/-    0.49       8.8 +/-    0.49  0.130 / 0.110
G12     321.1          44.6                7.9 +/-    0.98      10.8 +/-    0.98  0.040 / 0.060
G17     62.0           28.9                7.2 +/-    1.26      12.8 +/-    1.26  0.030 / 0.050
G19     42.4           48.0                7.9 +/-    1.04      10.2 +/-    1.04  0.030 / 0.030
G24     256.5          40.1               12.1 +/-    3.99      17.6 +/-    3.99  0.040 / 0.030
G28     126.0          9.6                10.9 +/-    2.28      30.7 +/-    2.28  0.040 / 0.050