PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-16:27:50
G02     17.4           67.4               10.2 +/-    0.78      11.0 +/-    0.78  0.030 / 0.030
G05     160.6          46.4               18.3 +/-    1.15      24.2 +/-    1.15  0.030 / 0.040
G06     46.8           28.1               10.3 +/-    0.75      18.8 +/-    0.75  0.110 / 0.410
G12     247.6          79.2               11.5 +/-    1.05      11.7 +/-    1.05  0.090 / 0.390
G19     89.7           16.6               16.4 +/-    1.95      39.3 +/-    1.95  0.050 / 0.080
G20     197.6          13.2               20.5 +/-    2.95      53.2 +/-    2.95  0.070 / 0.080
G24     218.8          12.7               15.7 +/-    3.39      41.2 +/-    3.39  0.050 / 0.060
G25     310.3          45.4               11.6 +/-    2.91      15.6 +/-    2.91  0.030 / 0.060
G29     299.4          21.9               11.5 +/-    2.23      24.2 +/-    2.23  0.050 / 0.090