PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/31-10:28:10
G01     39.8           13.9                1.8 +/-    1.46       4.7 +/-    1.46  0.060 / 0.070
G02     199.3          11.4                1.3 +/-    7.59       3.5 +/-    7.59  0.050 / 0.080
G06     176.7          40.3                8.7 +/-    1.09      12.6 +/-    1.09  0.160 / 0.340
G13     236.7          20.1                6.2 +/-    1.50      13.7 +/-    1.50  0.160 / 0.280
G15     268.3          11.4                5.6 +/-    2.61      15.1 +/-    2.61  0.030 / 0.030
G17     11.7           66.7                4.2 +/-    0.69       4.6 +/-    0.69  0.040 / 0.030
G19     292.2          71.4                5.8 +/-    0.99       6.1 +/-    0.99  0.170 / 0.360
G24     316.2          20.4                2.8 +/-    1.28       6.2 +/-    1.28  0.140 / 0.450
G28     76.3           44.8                5.3 +/-    0.52       7.2 +/-    0.52  0.050 / 0.070
G30     155.3          24.6                6.5 +/-    1.99      12.7 +/-    1.99  0.050 / 0.080