PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-07:28:10
G08     319.4          12.5                4.9 +/-    4.04      13.0 +/-    4.04  0.030 / 0.040
G10     310.0          55.9                5.7 +/-    1.54       6.7 +/-    1.54  0.040 / 0.040
G14     211.9          19.0                4.2 +/-    2.12       9.4 +/-    2.12  0.060 / 0.080
G15     45.5           20.5                4.5 +/-    2.50       9.7 +/-    2.50  0.070 / 0.090
G20     10.2           64.3                5.6 +/-    0.66       6.2 +/-    0.66  0.050 / 0.080
G21     116.3          67.2                7.7 +/-    0.97       8.2 +/-    0.97  0.060 / 0.050
G24     88.4           28.5                7.0 +/-    0.91      12.6 +/-    0.91  0.090 / 0.090
G27     293.9          36.0                7.9 +/-    1.34      12.3 +/-    1.34  0.090 / 0.110
G32     214.4          34.3                7.3 +/-    1.42      11.8 +/-    1.42  0.350 / 0.590