PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/17-20:27:50
G07     330.8          57.1               13.2 +/-    0.54      15.4 +/-    0.54  0.060 / 0.100
G08     106.8          52.2               14.0 +/-    0.39      17.2 +/-    0.39  0.060 / 0.070
G09     196.8          75.4               15.1 +/-    0.93      15.6 +/-    0.93  0.030 / 0.040
G11     148.6          11.7               17.3 +/-    1.52      46.4 +/-    1.52  0.040 / 0.050
G23     154.3          40.0               15.0 +/-    0.99      21.9 +/-    0.99  0.090 / 0.150
G27     55.4           31.7               11.2 +/-    1.15      19.0 +/-    1.15  0.110 / 0.150
G28     236.8          29.3               15.9 +/-    1.38      28.3 +/-    1.38  0.040 / 0.040
G30     303.0          37.0               12.4 +/-    1.69      18.9 +/-    1.69  0.040 / 0.050