PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-18:28:10
G01     123.1          15.0               14.8 +/-    1.00      36.9 +/-    1.00  0.040 / 0.050
G07     66.8           68.7               11.6 +/-    0.78      12.4 +/-    0.78  0.040 / 0.060
G08     48.4           38.1                9.1 +/-    0.43      13.7 +/-    0.43  0.020 / 0.040
G09     177.8          31.0               13.3 +/-    0.98      22.9 +/-    0.98  0.030 / 0.050
G11     114.1          37.8               13.4 +/-    0.78      20.2 +/-    0.78  0.120 / 0.320
G13     319.7          15.5               10.2 +/-    2.04      25.0 +/-    2.04  0.120 / 0.220
G17     201.9          16.7               18.3 +/-    1.31      43.7 +/-    1.31  0.050 / 0.060
G18     99.4           18.9               11.4 +/-    0.67      25.7 +/-    0.67  0.040 / 0.060
G28     285.0          55.6               13.3 +/-    0.49      15.8 +/-    0.49  0.050 / 0.120
G30     341.6          65.6               10.4 +/-    0.75      11.3 +/-    0.75  0.040 / 0.120