PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-06:12:50
G01     48.0           23.8                3.4 +/-    1.69       6.9 +/-    1.69  0.030 / 0.040
G06     180.8          23.8                4.8 +/-    1.57       9.7 +/-    1.57  0.040 / 0.050
G11     44.3           13.4                2.2 +/-    1.72       5.6 +/-    1.72  0.150 / 0.250
G13     249.1          28.8                7.0 +/-    2.16      12.5 +/-    2.16  0.130 / 0.400
G15     280.4          15.6                4.4 +/-    1.60      10.9 +/-    1.60  0.030 / 0.020
G17     330.7          77.5                6.0 +/-    0.41       6.2 +/-    0.41  0.030 / 0.020
G19     252.8          63.3                6.1 +/-    0.68       6.7 +/-    0.68  0.080 / 0.180
G28     57.4           51.3                6.1 +/-    0.89       7.6 +/-    0.89  0.080 / 0.080
G30     150.2          36.6                8.8 +/-    1.08      13.6 +/-    1.08  0.120 / 0.170