PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-18:58:00
G05     47.8           21.1                6.7 +/-    0.80      14.4 +/-    0.80  0.240 / 0.430
G10     235.2          11.6                9.1 +/-   15.02      24.5 +/-   15.02  0.270 / 0.460
G13     77.4           36.2               10.6 +/-    0.43      16.5 +/-    0.43  0.110 / 0.350
G15     134.3          50.4               11.4 +/-    0.87      14.4 +/-    0.87  0.130 / 0.390
G16     314.9          12.2                7.6 +/-    4.15      20.3 +/-    4.15  0.040 / 0.080
G20     246.7          35.7               10.7 +/-    1.36      16.8 +/-    1.36  0.060 / 0.100
G21     312.1          46.2                9.3 +/-    0.71      12.3 +/-    0.71  0.080 / 0.120
G25     198.1          10.9               10.5 +/-   16.02      28.7 +/-   16.02  0.060 / 0.100
G26     288.9          20.4                8.7 +/-    1.89      18.9 +/-    1.89  0.060 / 0.140
G29     153.9          74.6               10.5 +/-    0.72      10.8 +/-    0.72  0.060 / 0.160