PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-09:28:10
G02     358.1          76.7                4.4 +/-    0.36       4.5 +/-    0.36  0.090 / 0.080
G05     163.5          35.3                7.0 +/-    1.52      11.0 +/-    1.52  0.090 / 0.080
G06     40.6           43.7                3.1 +/-    1.31       4.2 +/-    1.31  0.040 / 0.020
G12     309.4          71.0                4.0 +/-    0.60       4.2 +/-    0.60  0.030 / 0.020
G17     87.9           10.0                6.7 +/-    3.01      18.6 +/-    3.01  0.190 / 0.280
G19     77.4           25.4                5.0 +/-    2.37       9.7 +/-    2.37  0.140 / 0.270
G24     228.2          21.9                5.8 +/-    1.69      12.2 +/-    1.69  0.120 / 0.110
G25     317.0          30.4                4.9 +/-    1.75       8.6 +/-    1.75  0.100 / 0.090
G29     288.8          12.4                6.1 +/-    3.24      16.2 +/-    3.24  0.030 / 0.050