PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-18:42:50
G01     316.3          23.2                9.6 +/-    1.40      19.7 +/-    1.40  0.090 / 0.300
G10     89.0           49.9               10.3 +/-    0.81      13.0 +/-    0.81  0.090 / 0.280
G11     298.0          25.1                9.6 +/-    0.93      18.7 +/-    0.93  0.210 / 0.210
G14     317.7          70.9               10.4 +/-    0.49      11.0 +/-    0.49  0.190 / 0.220
G18     107.9          22.7               11.1 +/-    1.31      22.8 +/-    1.31  0.040 / 0.050
G22     303.7          15.0                8.5 +/-    2.54      21.1 +/-    2.54  0.040 / 0.040
G25     95.5           11.4               10.9 +/-   15.66      29.5 +/-   15.66  0.040 / 0.030
G31     175.5          48.5               13.1 +/-    0.65      16.8 +/-    0.65  0.030 / 0.020
G32     17.9           62.9               10.3 +/-    0.51      11.4 +/-    0.51  0.050 / 0.040