PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-20:12:50
G01     71.9           33.1               10.4 +/-    1.37      17.0 +/-    1.37  0.080 / 0.220
G07     136.9          32.3               13.4 +/-    1.45      22.4 +/-    1.45  0.100 / 0.240
G11     55.1           32.3                9.0 +/-    1.20      15.0 +/-    1.20  0.050 / 0.100
G13     276.0          37.6               13.2 +/-    2.11      20.0 +/-    2.11  0.040 / 0.090
G15     303.6          15.0                7.9 +/-    1.96      19.6 +/-    1.96  0.060 / 0.040
G17     230.7          64.3               14.2 +/-    1.00      15.6 +/-    1.00  0.030 / 0.030
G18     50.1           19.0               10.2 +/-    1.89      23.1 +/-    1.89  0.100 / 0.220
G19     223.5          39.9               14.9 +/-    1.29      21.7 +/-    1.29  0.130 / 0.170
G28     18.4           59.4               11.9 +/-    1.12      13.5 +/-    1.12  0.030 / 0.050
G30     134.4          61.5               13.2 +/-    0.47      14.8 +/-    0.47  0.040 / 0.060