PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-06:28:00
G08     320.1          11.2               -6.7 +/-   29.78     -18.3 +/-   29.78  0.270 / 0.290
G10     310.6          55.6                3.8 +/-    1.83       4.5 +/-    1.83  0.160 / 0.330
G14     213.6          15.4                7.6 +/-    3.01      18.6 +/-    3.01  0.050 / 0.080
G15     45.6           20.7                3.6 +/-    2.15       7.7 +/-    2.15  0.070 / 0.080
G20     46.6           54.0                5.7 +/-    0.84       6.8 +/-    0.84  0.030 / 0.040
G21     117.7          68.3                6.2 +/-    0.70       6.7 +/-    0.70  0.030 / 0.030
G24     87.5           29.0                5.6 +/-    1.06      10.1 +/-    1.06  0.190 / 0.270
G27     289.9          37.1                7.8 +/-    1.91      11.9 +/-    1.91  0.220 / 0.330
G32     214.6          42.4                8.8 +/-    1.45      12.3 +/-    1.45  0.090 / 0.120