PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/23-20:57:50
G01     319.7          15.8               11.6 +/-    1.28      28.3 +/-    1.28  0.160 / 0.210
G08     259.3          14.4               12.8 +/-    2.29      32.3 +/-    2.29  0.150 / 0.320
G10     74.9           55.3               11.1 +/-    0.52      13.2 +/-    0.52  0.050 / 0.060
G11     305.4          21.9               12.3 +/-    0.92      25.7 +/-    0.92  0.050 / 0.090
G14     290.6          70.3               12.8 +/-    0.57      13.5 +/-    0.57  0.030 / 0.020
G18     100.1          29.7               12.6 +/-    1.21      22.1 +/-    1.21  0.030 / 0.030
G31     179.0          36.8               14.9 +/-    0.59      22.9 +/-    0.59  0.050 / 0.030
G32     357.4          70.0               11.9 +/-    0.37      12.6 +/-    0.37  0.040 / 0.040