PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/20-16:58:10
G08     289.6          23.9                9.1 +/-    0.97      18.1 +/-    0.97  0.040 / 0.090
G10     12.5           62.9                6.1 +/-    0.72       6.8 +/-    0.72  0.060 / 0.070
G14     231.2          48.6                9.2 +/-    2.19      11.8 +/-    2.19  0.110 / 0.080
G18     317.5          14.2                8.9 +/-    2.80      22.5 +/-    2.80  0.070 / 0.080
G20     67.8           51.2                8.3 +/-    0.80      10.3 +/-    0.80  0.040 / 0.030
G21     146.8          35.3                9.8 +/-    1.13      15.5 +/-    1.13  0.030 / 0.030
G24     51.5           21.8                8.2 +/-    3.66      17.2 +/-    3.66  0.180 / 0.230
G27     255.6          31.0                8.5 +/-    2.82      14.5 +/-    2.82  0.140 / 0.140
G32     248.1          68.0                8.8 +/-    0.39       9.4 +/-    0.39  0.090 / 0.160