PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/22-08:57:30
G10     286.9          48.5                3.2 +/-    2.72       4.1 +/-    2.72  0.040 / 0.030
G15     47.9           34.2                3.9 +/-    1.61       6.3 +/-    1.61  0.040 / 0.030
G20     333.7          65.1                3.6 +/-    0.56       4.0 +/-    0.56  0.150 / 0.110
G21     75.1           75.2                4.8 +/-    0.45       4.9 +/-    0.45  0.080 / 0.100
G24     104.2          23.0                5.0 +/-    1.48      10.1 +/-    1.48  0.190 / 0.240
G27     309.8          28.7                2.3 +/-    1.36       4.1 +/-    1.36  0.080 / 0.150
G32     208.5          19.9                4.7 +/-    2.23      10.4 +/-    2.23  0.090 / 0.110