PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-17:57:40
G01     123.5          14.6               13.4 +/-    2.01      33.6 +/-    2.01  0.040 / 0.070
G07     65.1           68.9               10.8 +/-    0.64      11.5 +/-    0.64  0.040 / 0.070
G08     48.6           38.3                8.1 +/-    0.50      12.1 +/-    0.50  0.030 / 0.040
G09     177.8          31.5               12.3 +/-    2.32      20.9 +/-    2.32  0.030 / 0.040
G11     114.6          37.5               12.1 +/-    0.69      18.4 +/-    0.69  0.040 / 0.060
G13     319.9          15.1                8.0 +/-    2.33      19.9 +/-    2.33  0.040 / 0.060
G17     201.7          16.4               13.3 +/-    2.50      31.8 +/-    2.50  0.060 / 0.110
G18     100.0          18.7               11.8 +/-    1.40      26.8 +/-    1.40  0.050 / 0.120
G28     283.9          55.3               10.9 +/-    0.81      13.0 +/-    0.81  0.030 / 0.030
G30     340.3          65.0               10.1 +/-    0.67      11.0 +/-    0.67  0.030 / 0.040