PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-19:12:40
G01     320.0          14.7                9.8 +/-    1.67      24.6 +/-    1.67  0.300 / 0.330
G08     261.1          15.0               11.2 +/-    1.38      27.9 +/-    1.38  0.280 / 0.330
G10     72.9           55.8               11.9 +/-    0.44      14.1 +/-    0.44  0.060 / 0.070
G11     307.0          20.7               10.1 +/-    2.14      21.8 +/-    2.14  0.100 / 0.070
G14     285.6          69.5               10.6 +/-    0.47      11.2 +/-    0.47  0.020 / 0.020
G18     99.2           30.1               12.6 +/-    1.47      22.0 +/-    1.47  0.020 / 0.020
G27     225.6          10.8               12.9 +/-    2.06      35.5 +/-    2.06  0.040 / 0.030
G31     178.3          36.5               14.3 +/-    0.56      22.2 +/-    0.56  0.030 / 0.040
G32     356.7          70.4               10.5 +/-    0.43      11.1 +/-    0.43  0.110 / 0.230