PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/23-19:42:50
G01     308.4          32.1                9.4 +/-    1.99      15.8 +/-    1.99  0.060 / 0.120
G10     104.3          41.7               11.5 +/-    0.64      16.3 +/-    0.64  0.070 / 0.130
G11     284.6          27.9                9.8 +/-    1.00      17.9 +/-    1.00  0.090 / 0.170
G14     353.3          67.6                8.5 +/-    0.31       9.1 +/-    0.31  0.080 / 0.150
G18     116.7          13.9               11.9 +/-    1.59      30.5 +/-    1.59  0.020 / 0.020
G22     309.0          24.2                9.5 +/-    0.84      18.9 +/-    0.84  0.030 / 0.030
G25     83.6           16.2               10.8 +/-    2.31      26.0 +/-    2.31  0.040 / 0.030
G31     170.6          62.3               12.8 +/-    0.36      14.3 +/-    0.36  0.050 / 0.030
G32     33.7           54.1                9.7 +/-    1.24      11.7 +/-    1.24  0.030 / 0.030