PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/28-07:58:10
G02     208.6          52.2                4.3 +/-    0.51       5.3 +/-    0.51  0.110 / 0.230
G06     135.5          80.5                4.0 +/-    0.30       4.1 +/-    0.30  0.090 / 0.240
G12     314.7          26.1                1.8 +/-    1.45       3.4 +/-    1.45  0.040 / 0.050
G17     50.0           38.1                1.8 +/-    0.80       2.7 +/-    0.80  0.050 / 0.050
G19     29.1           54.7                1.9 +/-    1.46       2.3 +/-    1.46  0.140 / 0.130
G24     280.3          41.9                5.6 +/-    1.94       7.9 +/-    1.94  0.150 / 0.140
G28     116.2          20.0                6.1 +/-    1.76      13.4 +/-    1.76  0.020 / 0.010