PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-19:12:40
G02     83.2           16.2                8.5 +/-    1.26      20.5 +/-    1.26  0.040 / 0.080
G05     44.6           33.9                7.0 +/-    0.72      11.3 +/-    0.72  0.050 / 0.080
G13     96.9           33.5               11.1 +/-    0.70      18.1 +/-    0.70  0.090 / 0.260
G15     150.1          36.9               10.9 +/-    1.03      16.8 +/-    1.03  0.100 / 0.200
G20     235.0          23.6               12.9 +/-    1.60      26.1 +/-    1.60  0.090 / 0.120
G21     298.1          36.4                8.7 +/-    1.33      13.4 +/-    1.33  0.060 / 0.120
G25     206.4          23.8                8.7 +/-    3.27      17.5 +/-    3.27  0.070 / 0.140
G26     303.9          18.9                8.0 +/-    1.95      18.0 +/-    1.95  0.080 / 0.140
G29     21.1           86.3                7.8 +/-    0.66       7.8 +/-    0.66  0.040 / 0.080