PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-18:58:00
G01     91.1           31.7               14.8 +/-    0.76      25.1 +/-    0.76  0.210 / 0.240
G07     124.8          46.6               15.7 +/-    0.75      20.6 +/-    0.75  0.100 / 0.410
G08     42.5           10.2               10.4 +/-    3.00      28.9 +/-    3.00  0.030 / 0.050
G11     70.5           40.6               13.6 +/-    0.78      19.5 +/-    0.78  0.040 / 0.050
G13     295.6          35.7               15.4 +/-    3.13      24.2 +/-    3.13  0.030 / 0.030
G17     214.6          49.6               17.0 +/-    0.75      21.6 +/-    0.75  0.030 / 0.030
G18     64.9           24.2               13.2 +/-    1.89      26.3 +/-    1.89  0.130 / 0.160
G19     214.5          25.0               18.1 +/-    1.94      35.4 +/-    1.94  0.080 / 0.130
G28     348.1          61.8               13.9 +/-    0.48      15.5 +/-    0.48  0.040 / 0.050
G30     103.0          75.8               14.8 +/-    0.67      15.2 +/-    0.67  0.040 / 0.060