PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-13:43:10
G03     239.0          71.4               11.3 +/-    0.44      11.9 +/-    0.44  0.040 / 0.050
G09     299.5          13.0                4.0 +/-   22.46      10.4 +/-   22.46  0.040 / 0.050
G14     95.0           17.4               10.0 +/-    2.56      23.5 +/-    2.56  0.040 / 0.030
G16     141.4          52.5               11.2 +/-    0.68      13.7 +/-    0.68  0.030 / 0.040
G22     193.0          58.2               11.0 +/-    0.36      12.7 +/-    0.36  0.040 / 0.050
G23     314.9          44.8                9.2 +/-    0.73      12.5 +/-    0.73  0.040 / 0.050
G26     82.8           55.2                8.8 +/-    0.71      10.5 +/-    0.71  0.110 / 0.300
G31     49.4           24.5                8.6 +/-    1.79      17.1 +/-    1.79  0.100 / 0.300