PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/12-06:57:40
G10     243.8          20.3                6.6 +/-    3.27      14.3 +/-    3.27  0.080 / 0.310
G13     62.5           34.2                5.3 +/-    1.23       8.6 +/-    1.23  0.110 / 0.300
G15     102.2          57.0                6.5 +/-    0.95       7.6 +/-    0.95  0.040 / 0.030
G16     303.9          15.1                1.8 +/-    1.87       4.4 +/-    1.87  0.040 / 0.040
G20     337.0          74.4                6.0 +/-    0.34       6.2 +/-    0.34  0.040 / 0.050
G21     324.5          54.7                4.8 +/-    0.37       5.7 +/-    0.37  0.060 / 0.050
G26     275.0          18.6                3.8 +/-    1.70       8.6 +/-    1.70  0.040 / 0.050
G29     162.0          59.5                7.5 +/-    0.42       8.6 +/-    0.42  0.030 / 0.040