PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-19:27:50
G01     65.3           32.1               12.0 +/-    0.50      20.1 +/-    0.50  0.060 / 0.130
G07     140.1          27.1               13.3 +/-    1.88      24.8 +/-    1.88  0.060 / 0.110
G11     51.1           28.0                9.4 +/-    0.62      17.1 +/-    0.62  0.100 / 0.340
G13     268.6          36.6               14.0 +/-    1.25      21.6 +/-    1.25  0.120 / 0.320
G15     298.8          15.7               10.5 +/-    3.10      25.6 +/-    3.10  0.040 / 0.060
G17     241.3          70.0               13.1 +/-    0.67      13.8 +/-    0.67  0.040 / 0.050
G18     45.7           15.9                9.3 +/-    1.15      22.6 +/-    1.15  0.060 / 0.150
G19     228.0          44.8               14.8 +/-    3.08      20.0 +/-    3.08  0.080 / 0.180
G28     28.2           58.0               10.5 +/-    0.67      12.2 +/-    0.67  0.030 / 0.060
G30     140.0          56.4               13.2 +/-    1.05      15.5 +/-    1.05  0.040 / 0.050