PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-03:13:00
G02     59.9           31.8                4.9 +/-    0.55       8.3 +/-    0.55  0.080 / 0.110
G05     57.1           59.9                5.0 +/-    0.56       5.7 +/-    0.56  0.090 / 0.090
G12     186.3          35.1                7.2 +/-    1.06      11.5 +/-    1.06  0.100 / 0.210
G13     127.3          14.9                7.9 +/-    1.95      19.7 +/-    1.95  0.090 / 0.210
G15     162.8          12.9                6.5 +/-    2.12      17.0 +/-    2.12  0.030 / 0.040
G21     272.2          18.7                6.8 +/-    1.68      15.4 +/-    1.68  0.030 / 0.040
G25     235.3          52.0                5.7 +/-    1.08       7.0 +/-    1.08  0.160 / 0.360
G29     332.9          58.5                5.2 +/-    1.38       6.0 +/-    1.38  0.170 / 0.280