PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/18-16:27:50
G08     307.3          20.6                6.4 +/-    2.04      13.8 +/-    2.04  0.060 / 0.060
G10     334.7          60.4                5.1 +/-    0.61       5.7 +/-    0.61  0.040 / 0.050
G14     218.2          32.2                8.5 +/-    1.05      14.2 +/-    1.05  0.030 / 0.030
G15     47.1           10.8                7.1 +/-    1.41      19.4 +/-    1.41  0.030 / 0.030
G20     39.4           60.0                6.9 +/-    1.13       7.9 +/-    1.13  0.070 / 0.100
G21     135.1          52.8                9.0 +/-    1.23      11.0 +/-    1.23  0.070 / 0.100
G24     68.7           27.9                6.0 +/-    1.16      10.9 +/-    1.16  0.070 / 0.160
G27     277.0          36.6                8.6 +/-    1.05      13.3 +/-    1.05  0.060 / 0.180
G32     223.7          52.0                8.0 +/-    0.95       9.8 +/-    0.95  0.070 / 0.080