PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/20-17:57:40
G03     188.6          19.9               10.7 +/-    1.57      23.6 +/-    1.57  0.130 / 0.180
G07     292.8          41.3               11.6 +/-    2.82      16.5 +/-    2.82  0.160 / 0.150
G08     140.6          27.7               11.7 +/-    1.15      21.6 +/-    1.15  0.030 / 0.020
G09     320.5          61.1               10.9 +/-    0.76      12.2 +/-    0.76  0.030 / 0.030
G16     44.4           44.9                9.6 +/-    0.67      12.9 +/-    0.67  0.060 / 0.080
G23     107.1          81.2               10.5 +/-    0.35      10.6 +/-    0.35  0.050 / 0.090
G26     43.8           15.8                9.5 +/-    2.76      23.1 +/-    2.76  0.200 / 0.260
G27     103.4          33.2               11.9 +/-    1.06      19.5 +/-    1.06  0.110 / 0.250
G30     273.3          12.6                8.8 +/-   18.77      23.2 +/-   18.77  0.300 / 0.310