PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-19:57:40
G01     308.9          31.7                7.4 +/-    1.80      12.4 +/-    1.80  0.120 / 0.160
G10     103.6          42.2                9.9 +/-    0.69      14.0 +/-    0.69  0.090 / 0.170
G11     285.1          28.0                6.2 +/-    0.74      11.3 +/-    0.74  0.070 / 0.120
G14     352.1          67.8                6.4 +/-    0.72       6.9 +/-    0.72  0.080 / 0.100
G18     116.3          14.4               10.6 +/-    0.90      26.8 +/-    0.90  0.040 / 0.040
G22     308.7          23.6                6.8 +/-    1.04      13.8 +/-    1.04  0.040 / 0.030
G25     84.1           16.0                8.9 +/-    1.04      21.7 +/-    1.04  0.070 / 0.240
G31     171.3          61.4               10.8 +/-    0.86      12.1 +/-    0.86  0.070 / 0.260
G32     32.8           54.6                7.7 +/-    0.71       9.2 +/-    0.71  0.030 / 0.050