PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-20:43:00
G01     69.0           32.7               13.3 +/-    0.68      22.0 +/-    0.68  0.110 / 0.330
G07     138.4          30.0               14.0 +/-    0.98      24.5 +/-    0.98  0.110 / 0.330
G11     53.4           30.7               12.0 +/-    0.95      20.7 +/-    0.95  0.050 / 0.080
G13     272.7          37.2               12.6 +/-    1.01      19.2 +/-    1.01  0.040 / 0.070
G15     301.3          15.5                7.9 +/-    1.64      19.4 +/-    1.64  0.060 / 0.130
G17     234.5          66.2               13.9 +/-    0.75      15.0 +/-    0.75  0.060 / 0.140
G18     48.2           17.7               10.2 +/-    0.77      23.8 +/-    0.77  0.070 / 0.150
G19     225.4          42.4               13.5 +/-    0.97      18.9 +/-    0.97  0.050 / 0.150
G28     23.0           58.8               11.7 +/-    0.29      13.5 +/-    0.29  0.040 / 0.040
G30     137.0          58.8               14.7 +/-    0.64      16.9 +/-    0.64  0.030 / 0.050