PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-19:27:40
G01     319.7          15.7                9.0 +/-    2.56      22.1 +/-    2.56  0.050 / 0.030
G08     259.9          14.4               10.1 +/-    1.82      25.5 +/-    1.82  0.040 / 0.040
G10     74.9           55.2                9.3 +/-    0.50      11.1 +/-    0.50  0.030 / 0.020
G11     305.9          21.4               11.4 +/-    1.56      24.3 +/-    1.56  0.030 / 0.030
G14     289.4          70.0                9.9 +/-    0.68      10.4 +/-    0.68  0.030 / 0.030
G18     100.3          29.3                9.5 +/-    0.74      16.8 +/-    0.74  0.030 / 0.030
G31     178.2          37.7               12.2 +/-    1.07      18.5 +/-    1.07  0.050 / 0.070
G32     359.4          69.7                9.4 +/-    0.34      10.0 +/-    0.34  0.050 / 0.060