PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-17:58:10
G07     48.6           67.7               11.4 +/-    0.39      12.2 +/-    0.39  0.050 / 0.040
G08     56.6           44.3               11.1 +/-    0.38      15.1 +/-    0.38  0.040 / 0.070
G09     179.9          45.3               14.4 +/-    1.61      19.4 +/-    1.61  0.030 / 0.040
G11     124.3          31.7               12.6 +/-    1.31      21.4 +/-    1.31  0.030 / 0.040
G18     108.1          13.0               13.3 +/-    2.46      34.7 +/-    2.46  0.060 / 0.100
G23     160.4          14.5               11.7 +/-    1.45      29.4 +/-    1.45  0.060 / 0.100
G27     39.2           14.5                9.1 +/-    1.00      23.0 +/-    1.00  0.090 / 0.440
G28     261.7          44.9               11.8 +/-    0.93      15.9 +/-    0.93  0.110 / 0.480
G30     326.8          56.2               10.2 +/-    0.77      12.0 +/-    0.77  0.110 / 0.330