PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-21:58:10
G02     202.8          34.5               17.5 +/-    2.41      28.0 +/-    2.41  0.110 / 0.260
G06     158.8          68.9               14.1 +/-    1.20      15.0 +/-    1.20  0.100 / 0.290
G12     307.4          15.2               10.7 +/-    1.95      26.4 +/-    1.95  0.080 / 0.110
G17     32.0           52.4               11.9 +/-    0.96      14.5 +/-    0.96  0.090 / 0.130
G19     356.0          66.2               11.6 +/-    0.91      12.6 +/-    0.91  0.060 / 0.110
G24     298.6          37.9               12.9 +/-    1.60      19.5 +/-    1.60  0.070 / 0.110
G28     102.0          31.5               13.7 +/-    0.61      23.3 +/-    0.61  0.060 / 0.090