PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-10:28:10
G02     349.0          78.7                5.1 +/-    0.96       5.2 +/-    0.96  0.050 / 0.080
G05     165.1          32.5                9.4 +/-    0.63      15.6 +/-    0.63  0.040 / 0.080
G06     39.8           46.5                4.1 +/-    0.69       5.4 +/-    0.69  0.020 / 0.040
G12     313.1          68.6                3.7 +/-    1.27       4.0 +/-    1.27  0.030 / 0.030
G17     86.2           11.0                5.4 +/-    1.59      14.8 +/-    1.59  0.090 / 0.130
G19     75.3           26.7                5.3 +/-    0.96      10.0 +/-    0.96  0.090 / 0.130
G24     230.3          23.6                6.6 +/-    1.01      13.4 +/-    1.01  0.030 / 0.040
G25     317.4          28.4                3.9 +/-    1.38       7.1 +/-    1.38  0.030 / 0.040
G29     287.2          11.5                4.4 +/-    9.38      11.8 +/-    9.38  0.120 / 0.190