PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-03:57:50
G10     251.3          27.1               13.7 +/-    2.37      25.5 +/-    2.37  0.080 / 0.240
G13     52.9           29.6                8.7 +/-    1.50      15.4 +/-    1.50  0.090 / 0.240
G15     85.4           57.5               11.3 +/-    0.74      13.2 +/-    0.74  0.040 / 0.050
G16     294.0          15.6               11.1 +/-    0.91      27.2 +/-    0.91  0.040 / 0.040
G20     284.6          62.3               10.0 +/-    1.04      11.2 +/-    1.04  0.080 / 0.510
G21     333.9          60.3                9.8 +/-    0.69      11.1 +/-    0.69  0.110 / 0.150
G26     265.6          15.3               14.9 +/-    1.62      36.8 +/-    1.62  0.030 / 0.040
G29     165.4          49.8               11.4 +/-    0.72      14.5 +/-    0.72  0.030 / 0.030