PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/12-10:27:50
G01     69.4           32.6                3.9 +/-    0.55       6.5 +/-    0.55  0.070 / 0.120
G07     137.9          28.4                5.6 +/-    0.77      10.2 +/-    0.77  0.070 / 0.120
G11     52.6           28.5                1.1 +/-    1.71       1.9 +/-    1.71  0.040 / 0.060
G13     275.4          36.7                7.1 +/-    1.72      10.9 +/-    1.72  0.040 / 0.050
G15     302.3          15.4                1.2 +/-    2.49       2.9 +/-    2.49  0.030 / 0.030
G17     237.3          72.4                5.4 +/-    0.39       5.6 +/-    0.39  0.030 / 0.040
G19     225.2          44.8                7.5 +/-    1.10      10.2 +/-    1.10  0.140 / 0.320
G28     22.4           58.8                3.3 +/-    0.54       3.8 +/-    0.54  0.110 / 0.420
G30     135.9          61.5                5.7 +/-    0.62       6.4 +/-    0.62  0.040 / 0.070