PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-15:13:10
G01     319.8          15.5                7.4 +/-    2.81      18.3 +/-    2.81  0.050 / 0.060
G08     262.3          14.5                6.9 +/-    1.03      17.4 +/-    1.03  0.040 / 0.060
G10     74.9           55.1                6.2 +/-    0.96       7.4 +/-    0.96  0.040 / 0.040
G11     307.6          19.8                6.7 +/-    1.90      14.8 +/-    1.90  0.030 / 0.040
G14     285.0          68.8                6.7 +/-    0.63       7.1 +/-    0.63  0.160 / 0.270
G31     176.2          39.5                8.9 +/-    1.20      13.1 +/-    1.20  0.180 / 0.440
G32     3.3            69.0                6.4 +/-    0.50       6.8 +/-    0.50  0.030 / 0.030