PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-15:13:10
G03     192.9          34.8                8.8 +/-    1.27      14.0 +/-    1.27  0.070 / 0.110
G07     276.5          32.8                8.1 +/-    0.95      13.4 +/-    0.95  0.050 / 0.090
G08     152.3          13.8               10.1 +/-    3.29      26.0 +/-    3.29  0.080 / 0.110
G09     318.0          44.2                5.1 +/-    1.43       7.0 +/-    1.43  0.050 / 0.140
G16     58.0           58.2                8.9 +/-    0.64      10.3 +/-    0.64  0.090 / 0.330
G22     179.9          18.7                9.3 +/-    0.93      21.1 +/-    0.93  0.090 / 0.310
G23     360.0          77.5                8.8 +/-    0.37       9.0 +/-    0.37  0.100 / 0.150
G26     44.7           29.0                7.1 +/-    1.18      12.6 +/-    1.18  0.110 / 0.170
G27     120.1          23.3               10.6 +/-    0.90      21.5 +/-    0.90  0.030 / 0.050