PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/27-21:42:50
G02     64.6           29.4                7.2 +/-    1.07      12.8 +/-    1.07  0.030 / 0.060
G05     50.5           54.6                7.1 +/-    0.66       8.5 +/-    0.66  0.030 / 0.040
G12     181.0          22.5               11.5 +/-    1.11      23.9 +/-    1.11  0.160 / 0.140
G13     122.0          20.1               11.5 +/-    1.32      25.3 +/-    1.32  0.070 / 0.110
G15     162.0          16.8               14.4 +/-    2.40      34.2 +/-    2.40  0.060 / 0.120
G21     276.8          20.9                8.6 +/-    1.36      18.4 +/-    1.36  0.050 / 0.120
G25     226.6          46.2               10.2 +/-    0.75      13.5 +/-    0.75  0.050 / 0.070
G29     332.0          60.4                9.0 +/-    0.53      10.2 +/-    0.53  0.060 / 0.080