PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/12-04:58:00
G01     82.2           33.0                6.3 +/-    0.94      10.4 +/-    0.94  0.050 / 0.080
G07     131.2          37.4                7.7 +/-    0.76      11.8 +/-    0.76  0.040 / 0.080
G11     59.9           35.5                5.1 +/-    0.44       8.1 +/-    0.44  0.090 / 0.100
G13     286.1          38.0                5.8 +/-    1.32       8.8 +/-    1.32  0.080 / 0.140
G15     311.7          11.6                2.0 +/-    1.56       5.5 +/-    1.56  0.070 / 0.120
G17     219.6          63.1               10.0 +/-    0.64      11.1 +/-    0.64  0.070 / 0.100
G18     54.3           20.2                4.5 +/-    1.60       9.9 +/-    1.60  0.080 / 0.280
G19     217.8          31.0                9.7 +/-    1.28      16.7 +/-    1.28  0.090 / 0.240
G28     357.5          61.4                6.3 +/-    0.98       7.0 +/-    0.98  0.030 / 0.040
G30     120.9          72.3                8.4 +/-    0.58       8.8 +/-    0.58  0.030 / 0.040