PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-15:43:10
G01     43.5           19.5                9.3 +/-    0.64      20.8 +/-    0.64  0.060 / 0.110
G06     174.2          36.2               11.8 +/-    1.88      18.3 +/-    1.88  0.060 / 0.110
G13     241.2          24.8               10.5 +/-    2.80      20.6 +/-    2.80  0.120 / 0.210
G15     277.7          13.1                8.5 +/-    1.73      22.2 +/-    1.73  0.110 / 0.140
G17     352.9          73.4               10.9 +/-    1.11      11.3 +/-    1.11  0.060 / 0.080
G19     261.3          63.8                8.8 +/-    0.95       9.7 +/-    0.95  0.060 / 0.080
G24     317.3          17.0                7.9 +/-    3.52      18.8 +/-    3.52  0.180 / 0.320
G28     65.7           49.0               10.3 +/-    0.38      13.2 +/-    0.38  0.140 / 0.240
G30     153.7          33.0               12.3 +/-    1.04      20.3 +/-    1.04  0.070 / 0.220