PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-19:58:00
G01     94.0           30.9               13.5 +/-    0.68      23.2 +/-    0.68  0.070 / 0.150
G07     122.2          48.9               14.6 +/-    0.69      18.7 +/-    0.69  0.080 / 0.170
G08     42.2           13.1                8.4 +/-    1.78      21.8 +/-    1.78  0.080 / 0.100
G11     74.1           41.7               13.0 +/-    0.63      18.4 +/-    0.63  0.080 / 0.120
G13     298.5          34.7               11.6 +/-    1.21      18.5 +/-    1.21  0.030 / 0.050
G17     213.1          46.2               15.7 +/-    1.04      20.8 +/-    1.04  0.040 / 0.060
G18     67.7           24.6               11.0 +/-    0.58      21.8 +/-    0.58  0.050 / 0.080
G19     213.3          23.0               14.1 +/-    2.72      28.9 +/-    2.72  0.040 / 0.090
G28     343.3          61.9               11.0 +/-    0.60      12.3 +/-    0.60  0.040 / 0.050
G30     94.7           76.9               12.8 +/-    0.98      13.1 +/-    0.98  0.040 / 0.050