PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/26-23:57:40
G03     199.2          40.2                8.8 +/-    0.57      12.7 +/-    0.57  0.090 / 0.130
G07     271.8          26.1                9.1 +/-    1.80      17.4 +/-    1.80  0.080 / 0.150
G08     154.2          12.1                8.0 +/-    4.27      21.2 +/-    4.27  0.190 / 0.270
G09     317.5          42.7                7.2 +/-    1.26      10.1 +/-    1.26  0.150 / 0.210
G16     59.9           60.0                7.6 +/-    0.48       8.6 +/-    0.48  0.040 / 0.030
G22     183.4          24.6                8.7 +/-    0.93      17.2 +/-    0.93  0.030 / 0.030
G23     352.7          75.2                7.0 +/-    0.41       7.2 +/-    0.41  0.070 / 0.140
G26     44.6           30.1                4.8 +/-    1.60       8.5 +/-    1.60  0.070 / 0.100
G27     118.9          22.9               10.0 +/-    1.31      20.4 +/-    1.31  0.040 / 0.050