PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/07-08:42:40
G02     201.6          32.2                6.2 +/-    1.75      10.4 +/-    1.75  0.060 / 0.100
G06     172.9          61.4                7.9 +/-    0.58       8.8 +/-    0.58  0.050 / 0.120
G12     305.3          11.2               -3.7 +/-   13.79     -10.0 +/-   13.79  0.120 / 0.150
G17     33.8           51.1                3.5 +/-    1.06       4.3 +/-    1.06  0.240 / 0.250
G19     356.7          66.8                2.8 +/-    0.49       3.0 +/-    0.49  0.030 / 0.030
G24     303.0          35.1                4.7 +/-    1.36       7.5 +/-    1.36  0.040 / 0.040
G28     99.4           32.9                5.1 +/-    0.89       8.4 +/-    0.89  0.050 / 0.070