PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-22:12:30
G02     209.1          50.5               19.7 +/-    0.64      24.7 +/-    0.64  0.110 / 0.150
G06     99.3           79.2               17.0 +/-    0.43      17.3 +/-    0.43  0.070 / 0.100
G12     315.1          27.9               12.7 +/-    1.57      23.3 +/-    1.57  0.100 / 0.200
G17     46.9           41.3               13.5 +/-    0.90      19.3 +/-    0.90  0.110 / 0.220
G19     24.4           56.8               15.2 +/-    0.81      17.8 +/-    0.81  0.020 / 0.020
G24     278.8          42.5               15.5 +/-    1.17      21.7 +/-    1.17  0.030 / 0.020
G28     115.6          20.7               17.2 +/-    0.99      37.1 +/-    0.99  0.060 / 0.050