PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/17-08:57:40
G02     26.0           62.0                4.3 +/-    0.44       4.8 +/-    0.44  0.030 / 0.040
G05     151.5          53.0                7.0 +/-    0.75       8.5 +/-    0.75  0.040 / 0.040
G06     47.6           27.5                1.6 +/-    1.48       3.0 +/-    1.48  0.090 / 0.500
G12     233.7          77.7                2.9 +/-    0.42       3.0 +/-    0.42  0.100 / 0.420
G19     92.3           15.3                4.2 +/-    1.36      10.4 +/-    1.36  0.160 / 0.370
G20     199.4          13.2                2.0 +/-    3.13       5.3 +/-    3.13  0.230 / 0.550
G24     215.9          10.0                2.5 +/-    2.29       7.1 +/-    2.29  0.030 / 0.060
G25     308.9          45.5                2.1 +/-    2.75       2.7 +/-    2.75  0.020 / 0.030
G29     301.3          22.9                3.5 +/-    1.36       7.2 +/-    1.36  0.070 / 0.090