PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/16-04:57:40
G10     250.7          26.6                8.4 +/-    1.10      15.9 +/-    1.10  0.090 / 0.290
G13     53.6           30.0                6.6 +/-    2.25      11.6 +/-    2.25  0.120 / 0.300
G15     85.9           57.4                8.8 +/-    1.22      10.3 +/-    1.22  0.030 / 0.040
G16     294.8          15.6                4.2 +/-    1.21      10.2 +/-    1.21  0.030 / 0.040
G20     300.0          68.3                5.6 +/-    0.37       6.0 +/-    0.37  0.060 / 0.130
G21     333.4          60.1                5.3 +/-    0.82       6.1 +/-    0.82  0.070 / 0.130
G26     266.3          15.6                7.2 +/-    1.34      17.7 +/-    1.34  0.040 / 0.040
G29     165.2          50.3                9.9 +/-    0.43      12.5 +/-    0.43  0.040 / 0.050