PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/16-09:57:50
G10     273.1          41.3                4.3 +/-    1.57       6.1 +/-    1.57  0.030 / 0.040
G13     39.9           14.5                2.8 +/-    3.41       7.1 +/-    3.41  0.030 / 0.030
G15     53.3           43.1                3.6 +/-    1.07       5.0 +/-    1.07  0.130 / 0.150
G20     52.4           40.6                2.3 +/-    0.80       3.3 +/-    0.80  0.080 / 0.170
G21     23.8           75.2                3.6 +/-    0.67       3.7 +/-    0.67  0.130 / 0.200
G24     116.1          17.3                6.0 +/-    1.45      14.0 +/-    1.45  0.090 / 0.180
G27     315.3          23.8                3.9 +/-    1.08       7.8 +/-    1.08  0.120 / 0.060
G29     168.1          24.6                5.3 +/-    1.61      10.4 +/-    1.61  0.120 / 0.080
G32     205.0          15.3                5.9 +/-    3.50      14.7 +/-    3.50  0.050 / 0.070