PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/08-14:27:50
G01     117.9          18.8               10.1 +/-    1.46      22.9 +/-    1.46  0.040 / 0.040
G07     84.0           65.9               10.3 +/-    0.25      11.1 +/-    0.25  0.030 / 0.040
G08     44.3           30.1                6.5 +/-    0.94      11.4 +/-    0.94  0.140 / 0.250
G09     175.9          23.4               11.0 +/-    2.16      22.4 +/-    2.16  0.110 / 0.240
G11     104.5          40.5               10.1 +/-    0.58      14.5 +/-    0.58  0.050 / 0.060
G13     316.9          20.6                7.1 +/-    2.26      15.4 +/-    2.26  0.040 / 0.060
G17     202.2          25.5                9.7 +/-    1.23      18.7 +/-    1.23  0.030 / 0.040
G18     92.6           21.4                8.7 +/-    0.91      18.5 +/-    0.91  0.020 / 0.040
G28     295.2          57.9                9.3 +/-    1.01      10.8 +/-    1.01  0.050 / 0.080
G30     347.9          69.4                9.0 +/-    0.84       9.5 +/-    0.84  0.050 / 0.080