PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-17:43:10
G08     299.9          21.9                5.6 +/-    2.46      11.7 +/-    2.46  0.050 / 0.100
G10     352.3          62.3                5.3 +/-    0.67       5.8 +/-    0.67  0.060 / 0.080
G14     225.0          40.8                7.1 +/-    2.30      10.2 +/-    2.30  0.040 / 0.060
G18     57.3           53.0                6.5 +/-    1.29       7.9 +/-    1.29  0.040 / 0.070
G21     141.9          41.1                9.6 +/-    1.15      13.8 +/-    1.15  0.060 / 0.070
G24     63.2           28.7                7.1 +/-    0.55      12.7 +/-    0.55  0.050 / 0.100
G27     259.9          34.4                5.9 +/-    1.06       9.4 +/-    1.06  0.030 / 0.030
G32     235.4          61.5                8.4 +/-    0.81       9.4 +/-    0.81  0.030 / 0.040