PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-06:43:10
G10     263.4          36.9                7.4 +/-    1.28      11.3 +/-    1.28  0.040 / 0.040
G13     43.5           20.3                4.3 +/-    2.12       9.4 +/-    2.12  0.040 / 0.040
G15     62.2           50.3                4.5 +/-    0.80       5.7 +/-    0.80  0.090 / 0.080
G16     286.8          12.7                4.8 +/-    1.40      12.5 +/-    1.40  0.060 / 0.060
G20     291.4          58.8                5.5 +/-    1.11       6.3 +/-    1.11  0.210 / 0.360
G21     0.9            70.4                4.8 +/-    1.06       5.0 +/-    1.06  0.230 / 0.280
G24     122.4          12.3                4.6 +/-    2.00      12.1 +/-    2.00  0.110 / 0.220
G27     320.8          14.5                1.6 +/-    3.54       4.0 +/-    3.54  0.120 / 0.250
G29     164.6          30.8                5.7 +/-    1.51       9.8 +/-    1.51  0.030 / 0.040