PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-15:43:10
G02     201.7          22.9               12.0 +/-    2.36      24.6 +/-    2.36  0.110 / 0.250
G06     168.9          58.8               10.0 +/-    0.71      11.4 +/-    0.71  0.150 / 0.190
G17     30.1           54.1                9.5 +/-    1.10      11.4 +/-    1.10  0.030 / 0.040
G19     344.5          69.5               10.4 +/-    0.60      11.1 +/-    0.60  0.040 / 0.030
G24     308.2          31.3                8.4 +/-    1.52      14.4 +/-    1.52  0.030 / 0.030
G28     93.4           36.7                9.2 +/-    1.01      14.2 +/-    1.01  0.040 / 0.030
G30     158.1          12.1               10.9 +/-    1.55      29.2 +/-    1.55  0.080 / 0.110