PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-18:27:50
G01     75.8           33.3               11.2 +/-    0.83      18.4 +/-    0.83  0.080 / 0.220
G07     134.9          35.2               12.3 +/-    1.46      19.5 +/-    1.46  0.080 / 0.190
G11     57.2           33.9                9.6 +/-    0.66      15.6 +/-    0.66  0.040 / 0.080
G13     279.8          37.8               13.1 +/-    0.82      19.8 +/-    0.82  0.040 / 0.080
G15     306.9          13.8               10.6 +/-    0.90      27.2 +/-    0.90  0.040 / 0.040
G17     226.6          62.7               13.9 +/-    1.23      15.4 +/-    1.23  0.040 / 0.040
G18     52.6           20.3               10.2 +/-    1.29      22.3 +/-    1.29  0.050 / 0.050
G19     221.3          36.4               14.7 +/-    1.22      22.8 +/-    1.22  0.040 / 0.060
G28     12.4           60.1                9.6 +/-    0.68      10.9 +/-    0.68  0.030 / 0.040
G30     130.6          65.4               12.7 +/-    0.70      13.8 +/-    0.70  0.030 / 0.040