PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/17-21:58:00
G01     122.5          15.4               14.4 +/-    2.73      35.5 +/-    2.73  0.180 / 0.290
G07     68.6           68.5               13.3 +/-    0.41      14.2 +/-    0.41  0.160 / 0.280
G08     48.3           38.3                9.4 +/-    0.61      14.0 +/-    0.61  0.210 / 0.290
G09     178.3          31.0               16.0 +/-    1.24      27.4 +/-    1.24  0.200 / 0.310
G11     115.2          37.9               14.2 +/-    0.84      21.4 +/-    0.84  0.040 / 0.050
G13     319.6          15.7                9.1 +/-    1.77      22.2 +/-    1.77  0.040 / 0.060
G17     201.8          17.9               17.6 +/-    1.61      40.9 +/-    1.61  0.090 / 0.070
G28     286.5          56.0               11.9 +/-    2.33      14.0 +/-    2.33  0.050 / 0.070
G30     346.6          67.5               12.3 +/-    0.29      13.2 +/-    0.29  0.030 / 0.030