PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-16:13:10
G07     354.3          63.9               10.3 +/-    0.62      11.3 +/-    0.62  0.070 / 0.080
G08     89.8           52.3               10.0 +/-    1.57      12.3 +/-    1.57  0.100 / 0.080
G09     188.4          69.5               10.9 +/-    0.80      11.6 +/-    0.80  0.050 / 0.040
G11     141.5          17.4               10.3 +/-    1.50      24.2 +/-    1.50  0.030 / 0.030
G23     156.8          35.8               10.9 +/-    0.96      17.1 +/-    0.96  0.100 / 0.190
G27     51.7           30.0                9.5 +/-    0.89      16.6 +/-    0.89  0.130 / 0.170
G28     239.7          29.0               12.6 +/-    1.82      22.6 +/-    1.82  0.070 / 0.070
G30     307.4          40.6               10.1 +/-    1.11      14.5 +/-    1.11  0.080 / 0.090