PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/02-07:57:50
G08     317.1          13.6                4.1 +/-    1.47      10.6 +/-    1.47  0.100 / 0.300
G10     319.9          57.8                3.9 +/-    0.93       4.5 +/-    0.93  0.100 / 0.230
G14     215.6          21.0                7.0 +/-    1.45      15.0 +/-    1.45  0.070 / 0.090
G15     45.9           15.5                2.5 +/-    1.83       6.2 +/-    1.83  0.080 / 0.090
G20     63.8           41.7                5.6 +/-    0.69       7.9 +/-    0.69  0.040 / 0.080
G21     126.8          63.1                7.0 +/-    0.64       7.7 +/-    0.64  0.050 / 0.090
G24     81.3           29.9                6.1 +/-    0.42      10.7 +/-    0.42  0.030 / 0.040
G27     282.6          37.8                6.0 +/-    1.03       9.0 +/-    1.03  0.030 / 0.040
G32     218.2          47.8                8.9 +/-    1.13      11.6 +/-    1.13  0.060 / 0.130