PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-10:57:40
G02     17.6           68.0                5.6 +/-    0.62       6.0 +/-    0.62  0.040 / 0.040
G05     158.2          45.6               11.0 +/-    0.61      14.7 +/-    0.61  0.040 / 0.040
G06     44.1           34.6                4.7 +/-    1.06       7.5 +/-    1.06  0.030 / 0.020
G12     272.2          78.6                7.5 +/-    1.17       7.6 +/-    1.17  0.030 / 0.020
G19     86.8           19.0                5.7 +/-    2.20      12.9 +/-    2.20  0.060 / 0.050
G24     220.7          14.6                6.8 +/-    1.94      17.1 +/-    1.94  0.080 / 0.050
G25     313.2          40.3                5.0 +/-    1.67       7.2 +/-    1.67  0.050 / 0.070
G29     297.0          19.7                6.5 +/-    1.14      14.4 +/-    1.14  0.050 / 0.070