PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-17:43:10
G01     122.7          15.3               14.7 +/-    3.47      36.3 +/-    3.47  0.070 / 0.090
G07     68.2           68.6               11.3 +/-    0.82      12.0 +/-    0.82  0.090 / 0.120
G08     47.8           37.2                9.2 +/-    0.48      14.0 +/-    0.48  0.050 / 0.130
G09     177.6          30.4               12.9 +/-    2.50      22.5 +/-    2.50  0.040 / 0.090
G11     113.2          38.0               13.4 +/-    1.03      20.2 +/-    1.03  0.030 / 0.040
G13     319.5          16.0                7.0 +/-    2.04      17.0 +/-    2.04  0.030 / 0.040
G17     201.8          17.6               15.3 +/-    1.34      35.7 +/-    1.34  0.030 / 0.040
G18     98.9           19.1               12.4 +/-    1.28      27.8 +/-    1.28  0.030 / 0.040
G28     285.7          55.7               11.3 +/-    1.01      13.4 +/-    1.01  0.130 / 0.270
G30     341.6          65.8               10.8 +/-    0.64      11.7 +/-    0.64  0.120 / 0.270