PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/07-18:13:10
G07     350.0          63.0               10.9 +/-    0.52      12.1 +/-    0.52  0.040 / 0.030
G08     90.6           51.9               11.9 +/-    1.04      14.6 +/-    1.04  0.030 / 0.040
G09     189.1          70.7               12.3 +/-    1.37      13.0 +/-    1.37  0.080 / 0.100
G11     142.0          16.6               15.0 +/-    2.23      35.9 +/-    2.23  0.080 / 0.090
G23     156.9          38.3               12.6 +/-    0.93      18.9 +/-    0.93  0.110 / 0.170
G27     53.1           31.0               10.3 +/-    1.23      17.7 +/-    1.23  0.070 / 0.170
G28     238.9          28.5               11.7 +/-    1.38      21.2 +/-    1.38  0.030 / 0.030
G30     305.7          38.7               10.4 +/-    1.32      15.5 +/-    1.32  0.030 / 0.030