PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/13-20:12:40
G05     50.8           13.9                6.8 +/-    3.16      17.4 +/-    3.16  0.250 / 0.240
G10     240.4          17.5               14.3 +/-    1.67      33.6 +/-    1.67  0.160 / 0.270
G13     67.4           35.1               11.2 +/-    1.84      17.7 +/-    1.84  0.090 / 0.410
G15     123.8          55.8               11.9 +/-    0.69      14.1 +/-    0.69  0.090 / 0.430
G16     307.7          14.6                5.9 +/-    2.27      14.7 +/-    2.27  0.040 / 0.060
G20     254.3          41.7               11.2 +/-    2.60      15.9 +/-    2.60  0.060 / 0.070
G21     319.4          51.1                9.7 +/-    0.59      12.1 +/-    0.59  0.070 / 0.120
G26     280.4          19.5                9.1 +/-    1.89      20.1 +/-    1.89  0.070 / 0.090
G29     159.9          65.7               11.2 +/-    0.52      12.2 +/-    0.52  0.030 / 0.040