PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-21:27:50
G02     202.1          31.3               16.6 +/-    1.12      28.3 +/-    1.12  0.150 / 0.310
G06     162.3          65.9               12.4 +/-    0.76      13.4 +/-    0.76  0.170 / 0.240
G12     305.8          13.2               10.4 +/-    1.97      26.9 +/-    1.97  0.040 / 0.020
G17     29.3           54.3               11.0 +/-    1.17      13.2 +/-    1.17  0.030 / 0.030
G19     348.5          67.7               10.8 +/-    0.67      11.5 +/-    0.67  0.080 / 0.110
G24     301.5          36.4               10.5 +/-    2.20      16.3 +/-    2.20  0.090 / 0.090
G28     99.1           33.4               12.0 +/-    1.13      19.6 +/-    1.13  0.060 / 0.120