PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-10:12:40
G02     350.0          78.5                3.0 +/-    0.68       3.0 +/-    0.68  0.040 / 0.080
G05     164.9          32.7                6.8 +/-    0.73      11.2 +/-    0.73  0.060 / 0.110
G12     312.9          68.8                0.6 +/-    1.09       0.7 +/-    1.09  0.120 / 0.230
G17     86.3           11.0                4.7 +/-    1.75      12.7 +/-    1.75  0.110 / 0.210
G19     75.4           26.6                4.3 +/-    0.58       8.0 +/-    0.58  0.070 / 0.310
G24     230.1          23.5                3.4 +/-    2.51       6.9 +/-    2.51  0.060 / 0.280
G25     317.4          28.5                0.1 +/-    1.17       0.2 +/-    1.17  0.030 / 0.040
G29     287.3          11.5                2.0 +/-    4.56       5.4 +/-    4.56  0.020 / 0.050