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               -2.0 +/-   25.53      -5.5 +/-   25.53  0.030 / 0.040
G10     310.6          55.6                4.3 +/-    0.51       5.1 +/-    0.51  0.030 / 0.040
G14     213.6          15.4               10.4 +/-    3.77      25.7 +/-    3.77  0.250 / 0.510
G15     45.6           20.7                2.2 +/-    1.07       4.7 +/-    1.07  0.210 / 0.300
G20     46.6           54.0                5.7 +/-    0.55       6.8 +/-    0.55  0.050 / 0.070
G21     117.7          68.3                6.7 +/-    1.18       7.1 +/-    1.18  0.060 / 0.090
G24     87.5           29.0                5.7 +/-    0.40      10.2 +/-    0.40  0.080 / 0.140
G27     289.9          37.1                5.8 +/-    1.26       8.9 +/-    1.26  0.080 / 0.140
G32     214.6          42.4                9.6 +/-    0.76      13.5 +/-    0.76  0.040 / 0.040