PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-17:42:40
G08     289.1          22.7                7.0 +/-    0.89      14.4 +/-    0.89  0.080 / 0.090
G10     16.0           63.2                9.2 +/-    0.61      10.2 +/-    0.61  0.090 / 0.090
G14     234.5          50.3                9.3 +/-    2.14      11.7 +/-    2.14  0.120 / 0.160
G18     70.9           47.2                8.9 +/-    0.58      11.7 +/-    0.58  0.120 / 0.160
G21     147.4          30.9                9.9 +/-    1.72      17.0 +/-    1.72  0.030 / 0.020
G24     53.0           24.3                8.0 +/-    1.90      15.9 +/-    1.90  0.030 / 0.020
G27     248.3          29.0                8.8 +/-    1.82      15.8 +/-    1.82  0.100 / 0.060
G32     256.0          70.5                9.1 +/-    0.65       9.6 +/-    0.65  0.100 / 0.070