PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-16:28:10
G07     338.0          59.8               11.7 +/-    0.64      13.3 +/-    0.64  0.030 / 0.050
G08     96.1           53.3               11.2 +/-    0.71      13.6 +/-    0.71  0.030 / 0.060
G09     187.2          69.6               13.1 +/-    0.71      13.9 +/-    0.71  0.050 / 0.080
G11     144.1          15.4               14.9 +/-    2.14      36.7 +/-    2.14  0.070 / 0.090
G23     155.3          33.3               13.0 +/-    0.78      21.3 +/-    0.78  0.080 / 0.140
G27     51.4           29.3               10.5 +/-    1.31      18.7 +/-    1.31  0.090 / 0.110
G28     240.7          32.8               15.5 +/-    1.25      25.6 +/-    1.25  0.030 / 0.040
G30     305.6          38.4                9.8 +/-    1.01      14.7 +/-    1.01  0.030 / 0.050