PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/21-16:57:40
G08     288.1          23.9                9.0 +/-    1.43      18.0 +/-    1.43  0.050 / 0.090
G10     15.7           62.9                7.2 +/-    0.49       8.0 +/-    0.49  0.050 / 0.110
G14     232.6          49.9               11.9 +/-    1.01      15.1 +/-    1.01  0.030 / 0.030
G18     317.4          15.4                6.0 +/-    2.40      14.8 +/-    2.40  0.030 / 0.050
G20     69.8           50.4                8.4 +/-    0.40      10.5 +/-    0.40  0.100 / 0.150
G21     147.4          33.9                9.4 +/-    0.72      15.3 +/-    0.72  0.120 / 0.180
G24     50.4           21.1                6.4 +/-    0.69      13.6 +/-    0.69  0.060 / 0.080
G27     254.1          30.3                9.4 +/-    1.54      16.3 +/-    1.54  0.060 / 0.070
G32     251.2          69.1                9.4 +/-    0.67      10.0 +/-    0.67  0.080 / 0.130