PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/21-14:58:00
G01     236.6          27.0                7.9 +/-    1.11      14.8 +/-    1.11  0.150 / 0.140
G03     307.9          60.8                6.6 +/-    0.94       7.5 +/-    0.94  0.120 / 0.130
G14     74.2           31.8                5.6 +/-    1.38       9.4 +/-    1.38  0.060 / 0.130
G16     160.6          28.0                8.0 +/-    2.16      14.7 +/-    2.16  0.070 / 0.110
G18     209.1          15.6                8.0 +/-    1.94      19.6 +/-    1.94  0.050 / 0.040
G22     252.7          77.1                8.3 +/-    0.40       8.5 +/-    0.40  0.050 / 0.040
G23     296.7          27.4                6.2 +/-    2.64      11.4 +/-    2.64  0.090 / 0.150
G26     126.7          47.7                9.7 +/-    1.08      12.6 +/-    1.08  0.100 / 0.170
G31     41.0           46.6                5.9 +/-    0.89       7.7 +/-    0.89  0.030 / 0.030
G32     86.7           18.3                6.6 +/-    1.81      15.2 +/-    1.81  0.040 / 0.030