PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/15-20:43:10
G07     336.2          59.1               19.1 +/-    0.49      21.9 +/-    0.49  0.090 / 0.070
G08     100.3          53.4               23.7 +/-    0.58      28.7 +/-    0.58  0.100 / 0.090
G09     191.0          71.7               21.3 +/-    0.70      22.3 +/-    0.70  0.040 / 0.040
G11     146.4          13.9               28.3 +/-    2.59      72.1 +/-    2.59  0.040 / 0.040
G23     155.5          36.4               22.4 +/-    0.41      34.7 +/-    0.41  0.030 / 0.030
G27     52.1           29.7               18.0 +/-    1.33      31.6 +/-    1.33  0.030 / 0.030
G28     239.8          32.2               25.5 +/-    2.16      42.7 +/-    2.16  0.070 / 0.150
G30     306.1          39.5               19.5 +/-    1.30      28.6 +/-    1.30  0.070 / 0.140