PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-20:12:50
G01     63.2           31.6               13.4 +/-    1.66      22.8 +/-    1.66  0.120 / 0.230
G07     141.0          25.3               19.5 +/-    1.16      37.7 +/-    1.16  0.140 / 0.250
G11     50.2           26.8               11.3 +/-    2.01      21.3 +/-    2.01  0.040 / 0.030
G13     266.3          36.1               20.9 +/-    1.38      32.5 +/-    1.38  0.050 / 0.040
G15     296.9          16.1               14.0 +/-    1.62      33.9 +/-    1.62  0.100 / 0.110
G17     245.1          71.0               19.3 +/-    0.43      20.3 +/-    0.43  0.080 / 0.120
G18     44.5           14.9               10.9 +/-    1.98      27.3 +/-    1.98  0.080 / 0.250
G19     229.7          46.8               21.0 +/-    2.21      27.7 +/-    2.21  0.090 / 0.260
G28     31.5           57.4               18.3 +/-    1.02      21.3 +/-    1.02  0.050 / 0.080
G30     141.4          54.1               19.3 +/-    0.33      23.3 +/-    0.33  0.090 / 0.070