PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/29-18:27:40
G01     320.0          14.7                9.1 +/-    1.73      22.9 +/-    1.73  0.030 / 0.030
G08     261.4          15.0                8.4 +/-    1.61      20.9 +/-    1.61  0.030 / 0.030
G10     72.9           55.8                9.4 +/-    0.44      11.1 +/-    0.44  0.080 / 0.090
G11     307.2          20.4                8.0 +/-    1.28      17.4 +/-    1.28  0.050 / 0.060
G14     285.0          69.4                9.7 +/-    0.49      10.3 +/-    0.49  0.340 / 0.310
G18     99.3           29.9               10.5 +/-    0.95      18.4 +/-    0.95  0.310 / 0.260
G27     225.7          10.8                9.4 +/-    2.08      25.6 +/-    2.08  0.030 / 0.030
G31     177.9          36.9               11.8 +/-    1.34      18.1 +/-    1.34  0.040 / 0.040
G32     357.6          70.3                9.2 +/-    0.38       9.7 +/-    0.38  0.020 / 0.030