PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-19:12:50
G01     78.1           33.3               14.7 +/-    1.04      24.1 +/-    1.04  0.110 / 0.090
G07     133.6          36.9               17.1 +/-    0.78      26.2 +/-    0.78  0.110 / 0.090
G11     59.1           35.3               14.3 +/-    1.30      22.5 +/-    1.30  0.020 / 0.030
G13     282.4          37.7               13.9 +/-    1.36      21.0 +/-    1.36  0.030 / 0.040
G15     308.2          13.5               10.9 +/-    2.70      28.1 +/-    2.70  0.030 / 0.040
G17     224.2          60.3               16.6 +/-    1.74      18.8 +/-    1.74  0.050 / 0.050
G18     54.4           21.1               13.3 +/-    4.39      28.5 +/-    4.39  0.290 / 0.220
G19     220.1          34.9               17.7 +/-    2.03      28.1 +/-    2.03  0.230 / 0.260
G28     9.0            60.5               14.3 +/-    1.68      16.2 +/-    1.68  0.090 / 0.100
G30     127.9          66.8               16.9 +/-    0.62      18.2 +/-    0.62  0.090 / 0.100