PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/28-18:27:50
G01     82.7           33.1               16.1 +/-    0.69      26.6 +/-    0.69  0.090 / 0.220
G07     130.8          40.4               17.4 +/-    0.73      25.1 +/-    0.73  0.120 / 0.280
G11     62.5           37.3               14.9 +/-    0.49      22.7 +/-    0.49  0.040 / 0.070
G13     287.1          37.4               16.5 +/-    1.20      25.2 +/-    1.20  0.040 / 0.070
G15     311.4          12.0               14.1 +/-    1.40      37.7 +/-    1.40  0.030 / 0.040
G17     220.2          57.1               20.0 +/-    0.97      23.3 +/-    0.97  0.040 / 0.030
G18     57.9           22.4               12.3 +/-    1.22      25.5 +/-    1.22  0.050 / 0.100
G19     217.9          31.2               21.6 +/-    1.89      36.8 +/-    1.89  0.050 / 0.100
G28     1.7            61.1               15.7 +/-    0.55      17.6 +/-    0.55  0.030 / 0.050
G30     121.2          70.5               17.0 +/-    0.29      17.9 +/-    0.29  0.040 / 0.040