PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/02-14:12:40
G07     32.1           69.5                8.3 +/-    0.78       8.8 +/-    0.78  0.060 / 0.170
G08     56.4           44.6                8.6 +/-    0.75      11.7 +/-    0.75  0.140 / 0.170
G09     177.9          42.0                9.5 +/-    0.75      13.4 +/-    0.75  0.030 / 0.040
G11     124.7          31.4                9.2 +/-    1.73      15.6 +/-    1.73  0.030 / 0.040
G18     109.6          13.3                9.4 +/-    1.88      24.3 +/-    1.88  0.030 / 0.020
G23     159.9          12.1                7.6 +/-    2.55      20.2 +/-    2.55  0.020 / 0.030
G27     38.5           12.5                6.6 +/-    2.68      17.5 +/-    2.68  0.160 / 0.220
G28     266.6          49.2                9.4 +/-    4.63      12.0 +/-    4.63  0.200 / 0.280
G30     325.5          54.9                7.9 +/-    0.37       9.4 +/-    0.37  0.050 / 0.060