PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-06:12:40
G10     294.6          50.7                5.4 +/-    1.00       6.8 +/-    1.00  0.060 / 0.040
G15     46.4           29.9                3.0 +/-    1.47       5.2 +/-    1.47  0.040 / 0.040
G20     32.5           59.1                4.4 +/-    0.36       5.1 +/-    0.36  0.040 / 0.040
G21     88.9           75.5                6.0 +/-    0.57       6.2 +/-    0.57  0.050 / 0.040
G24     99.2           25.8                6.7 +/-    0.51      12.9 +/-    0.51  0.050 / 0.060
G27     302.0          33.6                5.1 +/-    1.72       8.2 +/-    1.72  0.060 / 0.090
G32     209.6          31.9                5.2 +/-    1.33       8.7 +/-    1.33  0.070 / 0.110