PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-06:42:30
G10     275.3          43.5                6.1 +/-    1.89       8.3 +/-    1.89  0.040 / 0.030
G13     38.9           12.1                3.8 +/-    2.69      10.0 +/-    2.69  0.040 / 0.030
G15     52.3           42.0                4.5 +/-    0.82       6.4 +/-    0.82  0.090 / 0.070
G20     312.5          63.0                5.7 +/-    0.73       6.3 +/-    0.73  0.090 / 0.070
G21     31.9           75.5                6.4 +/-    0.73       6.6 +/-    0.73  0.180 / 0.360
G24     113.5          18.3                6.4 +/-    1.22      14.6 +/-    1.22  0.580 / 0.540
G27     316.0          22.7                4.3 +/-    1.46       8.8 +/-    1.46  0.160 / 0.260
G29     166.0          20.2                5.0 +/-    1.89      10.9 +/-    1.89  0.180 / 0.430
G32     206.5          11.1              -12.1 +/-   27.01     -33.0 +/-   27.01  0.100 / 0.150