PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/22-16:27:40
G02     206.8          41.0               11.9 +/-    1.51      17.0 +/-    1.51  0.090 / 0.150
G06     138.7          77.0               11.2 +/-    0.62      11.5 +/-    0.62  0.070 / 0.110
G12     312.4          22.5                8.3 +/-    1.28      17.2 +/-    1.28  0.080 / 0.090
G17     46.1           40.7                9.6 +/-    1.17      13.8 +/-    1.17  0.070 / 0.080
G19     21.5           58.4               11.1 +/-    1.03      12.8 +/-    1.03  0.040 / 0.060
G24     289.8          40.5                7.2 +/-    4.14      10.3 +/-    4.14  0.090 / 0.060
G28     110.8          24.9               10.7 +/-    1.56      20.9 +/-    1.56  0.050 / 0.080