PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-06:13:00
G02     359.5          76.3                2.9 +/-    0.91       3.0 +/-    0.91  0.160 / 0.330
G05     162.4          36.2                8.7 +/-    1.10      13.5 +/-    1.10  0.120 / 0.340
G06     41.5           40.9                2.5 +/-    0.69       3.6 +/-    0.69  0.040 / 0.060
G12     309.0          71.4                2.9 +/-    1.33       3.1 +/-    1.33  0.040 / 0.070
G17     87.3           11.5                5.0 +/-    2.23      13.5 +/-    2.23  0.040 / 0.080
G19     77.1           25.9                4.5 +/-    1.66       8.6 +/-    1.66  0.040 / 0.090
G24     227.7          21.6                6.1 +/-    2.10      12.9 +/-    2.10  0.030 / 0.040
G25     317.1          29.9                3.6 +/-    2.96       6.3 +/-    2.96  0.030 / 0.030
G29     288.1          11.0               -1.1 +/-   17.03      -3.0 +/-   17.03  0.110 / 0.130