PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/25-02:13:00
G01     104.9          26.7                5.0 +/-    1.59       9.4 +/-    1.59  0.040 / 0.040
G07     109.9          56.7                6.5 +/-    0.69       7.6 +/-    0.69  0.040 / 0.040
G08     42.0           19.7                4.2 +/-    1.91       9.4 +/-    1.91  0.180 / 0.280
G09     175.1          12.6                8.0 +/-    1.26      21.0 +/-    1.26  0.150 / 0.140
G11     88.6           43.1                8.1 +/-    0.96      11.3 +/-    0.96  0.090 / 0.060
G13     308.7          29.1                5.5 +/-    0.71       9.7 +/-    0.71  0.060 / 0.060
G17     207.0          39.5                8.8 +/-    1.40      12.9 +/-    1.40  0.060 / 0.100
G19     209.6          15.5                8.7 +/-    2.54      21.3 +/-    2.54  0.070 / 0.140
G28     323.7          61.4                4.3 +/-    0.70       4.8 +/-    0.70  0.030 / 0.040
G30     53.3           78.3                4.7 +/-    1.29       4.8 +/-    1.29  0.030 / 0.040