PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-05:27:50
G01     68.2           32.5                4.7 +/-    1.44       7.9 +/-    1.44  0.040 / 0.040
G07     138.7          28.6                8.4 +/-    1.12      15.1 +/-    1.12  0.050 / 0.040
G11     52.9           29.6                4.9 +/-    1.33       8.7 +/-    1.33  0.110 / 0.230
G13     273.1          36.8                5.5 +/-    2.29       8.4 +/-    2.29  0.100 / 0.250
G15     300.0          16.1                2.5 +/-    2.43       6.0 +/-    2.43  0.020 / 0.030
G17     238.8          71.6                7.2 +/-    0.57       7.5 +/-    0.57  0.020 / 0.030
G19     226.2          45.3                7.8 +/-    1.94      10.5 +/-    1.94  0.060 / 0.080
G28     24.8           58.4                7.7 +/-    1.56       8.8 +/-    1.56  0.040 / 0.060
G30     137.2          57.4                7.9 +/-    0.72       9.2 +/-    0.72  0.140 / 0.150