PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-22:57:40
G02     215.3          60.3               13.9 +/-    0.55      15.7 +/-    0.55  0.060 / 0.090
G06     58.6           74.3               12.6 +/-    0.38      13.1 +/-    0.38  0.060 / 0.100
G12     318.5          36.0               10.6 +/-    1.49      16.5 +/-    1.49  0.170 / 0.370
G17     54.9           35.5                9.7 +/-    1.19      15.3 +/-    1.19  0.130 / 0.360
G19     37.1           50.7                9.9 +/-    0.52      12.4 +/-    0.52  0.030 / 0.050
G24     266.0          41.8               12.6 +/-    1.30      17.8 +/-    1.30  0.040 / 0.060
G28     122.3          13.9               13.9 +/-    1.09      35.6 +/-    1.09  0.070 / 0.080