PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-12:12:50
G01     272.9          41.1                7.3 +/-    2.09      10.4 +/-    2.09  0.070 / 0.060
G03     315.8          30.5                5.3 +/-    1.30       9.2 +/-    1.30  0.070 / 0.040
G10     128.9          18.2                6.1 +/-    2.45      14.1 +/-    2.45  0.180 / 0.290
G11     253.4          20.9                7.2 +/-    4.97      15.5 +/-    4.97  0.190 / 0.240
G14     36.9           53.8                6.2 +/-    1.38       7.5 +/-    1.38  0.050 / 0.080
G18     236.9          40.2                6.9 +/-    1.44      10.0 +/-    1.44  0.060 / 0.080
G22     314.7          56.4                3.9 +/-    0.86       4.6 +/-    0.86  0.200 / 0.340
G25     54.3           17.5                5.4 +/-    5.89      12.6 +/-    5.89  0.220 / 0.420
G31     56.1           72.9                5.4 +/-    0.35       5.6 +/-    0.35  0.060 / 0.060
G32     64.0           31.9                5.1 +/-    1.31       8.5 +/-    1.31  0.060 / 0.040