PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/26-09:57:50
G02     61.8           29.8                2.9 +/-    0.85       5.2 +/-    0.85  0.030 / 0.030
G05     56.1           59.3                4.1 +/-    0.72       4.7 +/-    0.72  0.020 / 0.030
G12     186.1          32.6                5.3 +/-    1.20       8.8 +/-    1.20  0.090 / 0.080
G13     128.2          15.9                5.0 +/-    2.44      12.1 +/-    2.44  0.060 / 0.100
G15     161.8          13.7                3.9 +/-    3.04      10.0 +/-    3.04  0.090 / 0.080
G20     210.9          56.7                8.1 +/-    0.67       9.5 +/-    0.67  0.080 / 0.100
G21     273.3          20.7                3.2 +/-    2.25       7.0 +/-    2.25  0.120 / 0.320
G25     236.0          51.1                7.3 +/-    3.36       9.0 +/-    3.36  0.110 / 0.390
G29     331.1          57.9                3.7 +/-    0.61       4.3 +/-    0.61  0.040 / 0.050