PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-19:57:50
G05     52.5           10.9                7.1 +/-    1.72      19.4 +/-    1.72  0.030 / 0.050
G10     243.5          20.6                9.6 +/-    3.48      20.8 +/-    3.48  0.040 / 0.050
G13     62.3           33.7                8.4 +/-    1.34      13.7 +/-    1.34  0.120 / 0.310
G15     115.1          58.0                9.0 +/-    0.61      10.4 +/-    0.61  0.090 / 0.420
G16     303.7          15.3                5.9 +/-    1.52      14.7 +/-    1.52  0.160 / 0.170
G20     258.9          44.8                9.5 +/-    3.27      12.8 +/-    3.27  0.510 / 0.350
G21     324.0          54.1                8.5 +/-    0.47      10.2 +/-    0.47  0.090 / 0.100
G26     276.2          18.5                7.8 +/-    0.65      17.7 +/-    0.65  0.070 / 0.090
G29     161.8          60.6               10.5 +/-    0.48      11.8 +/-    0.48  0.030 / 0.030