PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-23:57:50
G01     120.5          17.0               10.9 +/-    0.94      25.9 +/-    0.94  0.040 / 0.070
G07     75.8           67.4                9.5 +/-    0.69      10.2 +/-    0.69  0.040 / 0.070
G08     46.4           35.0                8.4 +/-    0.41      13.4 +/-    0.41  0.040 / 0.060
G09     178.0          28.6               13.0 +/-    3.33      23.5 +/-    3.33  0.040 / 0.060
G11     112.4          39.0               11.2 +/-    0.54      16.6 +/-    0.54  0.060 / 0.130
G13     318.8          17.4                6.5 +/-    1.61      15.2 +/-    1.61  0.070 / 0.130
G17     201.9          21.6               10.0 +/-    3.01      21.2 +/-    3.01  0.070 / 0.200
G28     291.0          57.1               10.1 +/-    1.03      11.8 +/-    1.03  0.080 / 0.210
G30     354.5          70.2                9.6 +/-    0.65      10.1 +/-    0.65  0.030 / 0.040