PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-08:28:10
G02     214.0          60.5                4.7 +/-    0.96       5.3 +/-    0.96  0.190 / 0.270
G06     77.8           81.0                4.6 +/-    0.60       4.7 +/-    0.60  0.140 / 0.320
G12     317.7          33.1                2.5 +/-    1.45       4.1 +/-    1.45  0.070 / 0.120
G17     56.8           32.8                2.7 +/-    1.42       4.6 +/-    1.42  0.090 / 0.100
G19     39.1           49.3                2.8 +/-    1.26       3.5 +/-    1.26  0.060 / 0.070
G24     269.2          41.6                4.0 +/-    2.82       5.7 +/-    2.82  0.050 / 0.080
G28     122.0          14.0                8.3 +/-    3.29      21.0 +/-    3.29  0.030 / 0.020