PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/07-21:27:50
G01     41.4           16.8                8.9 +/-    2.91      21.2 +/-    2.91  0.150 / 0.300
G06     174.5          39.3               13.2 +/-    1.05      19.4 +/-    1.05  0.350 / 0.380
G13     238.3          22.3               15.1 +/-    1.01      31.4 +/-    1.01  0.120 / 0.230
G15     271.6          12.4               13.7 +/-    3.38      36.1 +/-    3.38  0.130 / 0.320
G17     349.5          72.6               12.3 +/-    0.70      12.9 +/-    0.70  0.030 / 0.030
G19     273.8          67.8               11.2 +/-    0.78      12.0 +/-    0.78  0.030 / 0.030
G24     316.7          19.0                8.8 +/-    1.33      19.8 +/-    1.33  0.060 / 0.060
G28     71.4           46.8               11.5 +/-    1.24      15.1 +/-    1.24  0.070 / 0.070
G30     154.2          27.0               12.7 +/-    1.05      23.7 +/-    1.05  0.050 / 0.070