PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/10-16:57:50
G02     52.9           38.3                8.9 +/-    0.28      13.3 +/-    0.28  0.040 / 0.090
G05     81.9           69.8                9.9 +/-    0.46      10.4 +/-    0.46  0.040 / 0.080
G12     187.8          42.4               11.5 +/-    1.56      16.0 +/-    1.56  0.060 / 0.060
G20     203.9          50.4               12.3 +/-    2.40      15.5 +/-    2.40  0.050 / 0.060
G21     265.0          13.9               10.5 +/-    4.64      26.8 +/-    4.64  0.030 / 0.040
G25     247.3          56.7               11.6 +/-    0.68      13.6 +/-    0.68  0.020 / 0.030
G29     326.4          51.4                8.2 +/-    0.70      10.2 +/-    0.70  0.160 / 0.240