PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-18:42:50
G01     320.2          14.2                9.0 +/-    2.46      22.8 +/-    2.46  0.190 / 0.310
G08     261.9          15.3               10.7 +/-    1.75      26.5 +/-    1.75  0.270 / 0.320
G10     71.9           56.1               10.7 +/-    0.66      12.6 +/-    0.66  0.060 / 0.070
G11     307.6          20.2                8.1 +/-    1.66      17.7 +/-    1.66  0.060 / 0.080
G14     283.4          69.2               11.0 +/-    0.38      11.7 +/-    0.38  0.030 / 0.020
G18     98.7           30.4               11.7 +/-    1.92      20.3 +/-    1.92  0.020 / 0.020
G27     226.1          11.2               10.4 +/-    0.71      28.3 +/-    0.71  0.030 / 0.030
G31     178.2          36.1               13.4 +/-    1.36      20.8 +/-    1.36  0.040 / 0.040
G32     355.7          70.7               10.6 +/-    0.49      11.2 +/-    0.49  0.040 / 0.030