PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-08:57:40
G02     210.2          54.7               10.7 +/-    1.14      12.8 +/-    1.14  0.100 / 0.400
G06     120.1          81.8                8.0 +/-    0.94       8.1 +/-    0.94  0.090 / 0.360
G12     315.8          28.3                5.0 +/-    1.02       9.0 +/-    1.02  0.060 / 0.120
G17     52.5           36.0                4.2 +/-    0.67       6.5 +/-    0.67  0.070 / 0.110
G19     32.7           52.8                4.3 +/-    0.53       5.3 +/-    0.53  0.030 / 0.030
G24     276.8          42.0                7.1 +/-    1.92      10.0 +/-    1.92  0.030 / 0.030
G28     118.2          18.0                8.1 +/-    0.86      18.8 +/-    0.86  0.080 / 0.070