PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-16:43:10
G02     232.9          70.2                6.8 +/-    0.64       7.2 +/-    0.64  0.170 / 0.270
G05     173.4          13.2                8.4 +/-    3.20      21.9 +/-    3.20  0.210 / 0.290
G06     41.9           59.0                7.7 +/-    0.45       8.9 +/-    0.45  0.070 / 0.100
G12     322.9          54.0                7.4 +/-    0.43       8.9 +/-    0.43  0.100 / 0.080
G17     69.3           22.7                7.1 +/-    1.64      14.6 +/-    1.64  0.050 / 0.050
G19     50.9           43.5                7.8 +/-    1.29      10.8 +/-    1.29  0.040 / 0.040
G24     246.3          36.3                9.4 +/-    1.08      14.5 +/-    1.08  0.310 / 0.340
G25     316.0          10.6              -13.5 +/-   25.18     -37.1 +/-   25.18  0.030 / 0.030