PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/24-05:27:50
G01     70.4           32.9                3.8 +/-    1.15       6.3 +/-    1.15  0.030 / 0.040
G07     137.6          30.3                8.1 +/-    1.10      14.1 +/-    1.10  0.030 / 0.040
G11     54.2           30.9                4.3 +/-    1.53       7.4 +/-    1.53  0.030 / 0.020
G13     275.5          37.0                4.2 +/-    2.89       6.4 +/-    2.89  0.030 / 0.020
G15     301.7          15.8                0.5 +/-    1.12       1.3 +/-    1.12  0.080 / 0.200
G17     234.8          70.1                5.2 +/-    0.31       5.5 +/-    0.31  0.090 / 0.210
G19     224.6          43.5                5.7 +/-    2.37       7.8 +/-    2.37  0.060 / 0.070
G28     21.5           58.9                2.2 +/-    2.08       2.6 +/-    2.08  0.040 / 0.060
G30     135.4          59.3                7.4 +/-    0.52       8.4 +/-    0.52  0.060 / 0.100