PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/25-21:57:40
G02     211.7          54.8               14.3 +/-    0.60      17.0 +/-    0.60  0.080 / 0.120
G06     75.3           77.7               12.3 +/-    0.26      12.6 +/-    0.26  0.100 / 0.090
G12     316.9          31.9               10.9 +/-    1.11      18.4 +/-    1.11  0.050 / 0.070
G17     51.0           38.2               11.1 +/-    1.40      16.7 +/-    1.40  0.050 / 0.070
G19     30.3           54.1               11.4 +/-    1.77      13.7 +/-    1.77  0.030 / 0.020
G24     272.6          42.5               12.2 +/-    3.30      17.1 +/-    3.30  0.040 / 0.020
G28     118.8          17.6               12.7 +/-    1.80      29.6 +/-    1.80  0.050 / 0.050