PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-15:43:10
G08     295.9          22.1                7.0 +/-    1.38      14.6 +/-    1.38  0.110 / 0.130
G10     3.3            63.0               23.3 +/-    0.74      25.8 +/-    0.74  0.070 / 0.090
G14     228.9          44.5                9.5 +/-    2.19      12.9 +/-    2.19  0.040 / 0.070
G18     64.3           50.0                8.5 +/-    1.11      10.7 +/-    1.11  0.050 / 0.070
G21     145.0          38.0               11.7 +/-    0.70      17.6 +/-    0.70  0.090 / 0.140
G24     58.0           26.8                6.3 +/-    1.04      11.8 +/-    1.04  0.100 / 0.090
G27     254.4          32.1                7.1 +/-    2.52      12.0 +/-    2.52  0.090 / 0.120
G32     243.9          66.8                8.9 +/-    0.49       9.5 +/-    0.49  0.120 / 0.110