PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/12-16:57:50
G02     205.2          35.4               13.9 +/-    3.06      21.9 +/-    3.06  0.100 / 0.100
G03     55.8           9.7                 9.7 +/-    2.10      27.1 +/-    2.10  0.070 / 0.090
G06     152.6          72.9               12.8 +/-    0.62      13.3 +/-    0.62  0.050 / 0.080
G12     310.1          18.9               10.3 +/-    1.80      23.3 +/-    1.80  0.060 / 0.060
G17     41.9           44.2                9.8 +/-    1.28      13.3 +/-    1.28  0.080 / 0.200
G19     13.7           61.7               10.7 +/-    0.84      11.9 +/-    0.84  0.130 / 0.140
G24     295.8          38.7                8.2 +/-    2.16      12.2 +/-    2.16  0.040 / 0.050
G28     106.5          28.4               11.4 +/-    1.16      20.6 +/-    1.16  0.030 / 0.060