PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-16:57:30
G01     315.1          25.1                6.0 +/-    1.80      11.7 +/-    1.80  0.180 / 0.170
G10     92.4           48.3                8.6 +/-    1.08      11.1 +/-    1.08  0.130 / 0.160
G11     296.3          25.3                6.4 +/-    0.97      12.4 +/-    0.97  0.040 / 0.040
G14     323.1          70.6                7.3 +/-    0.53       7.7 +/-    0.53  0.040 / 0.040
G22     305.1          17.6                7.1 +/-    2.95      16.5 +/-    2.95  0.170 / 0.210
G25     93.6           12.5                9.7 +/-    1.53      25.6 +/-    1.53  0.230 / 0.210
G31     173.5          52.2               11.0 +/-    0.73      13.5 +/-    0.73  0.030 / 0.040
G32     22.7           60.6                7.2 +/-    0.50       8.2 +/-    0.50  0.030 / 0.040