PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-21:43:10
G07     335.3          58.7               10.6 +/-    0.42      12.2 +/-    0.42  0.130 / 0.170
G08     100.1          53.0               12.6 +/-    0.38      15.3 +/-    0.38  0.070 / 0.140
G09     192.0          72.4               11.9 +/-    0.41      12.4 +/-    0.41  0.070 / 0.080
G11     147.2          13.4               18.5 +/-    3.11      47.8 +/-    3.11  0.120 / 0.080
G23     155.5          37.7               14.0 +/-    0.77      21.2 +/-    0.77  0.030 / 0.040
G27     52.6           30.0               10.9 +/-    1.94      19.0 +/-    1.94  0.030 / 0.040
G28     239.3          31.7               13.2 +/-    1.86      22.2 +/-    1.86  0.060 / 0.080
G30     306.0          39.6               10.5 +/-    1.34      15.4 +/-    1.34  0.060 / 0.080