PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-08:12:40
G08     318.9          12.1                3.6 +/-    5.12       9.6 +/-    5.12  0.070 / 0.080
G10     315.6          56.8                4.9 +/-    1.11       5.8 +/-    1.11  0.060 / 0.070
G14     214.6          18.9                3.7 +/-    2.55       8.3 +/-    2.55  0.110 / 0.400
G15     45.7           17.5                3.3 +/-    2.67       7.7 +/-    2.67  0.260 / 0.440
G20     63.4           40.8                4.9 +/-    0.95       7.1 +/-    0.95  0.090 / 0.040
G21     123.2          65.2                7.2 +/-    0.69       7.9 +/-    0.69  0.080 / 0.050
G24     84.3           29.7                8.3 +/-    1.20      14.6 +/-    1.20  0.050 / 0.040
G27     285.8          37.7                8.8 +/-    0.61      13.3 +/-    0.61  0.050 / 0.040
G32     216.5          45.3                6.3 +/-    1.04       8.4 +/-    1.04  0.060 / 0.040