PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/08-14:57:50
G05     47.8           19.9                4.7 +/-    1.89      10.3 +/-    1.89  0.220 / 0.240
G13     81.2           37.2                7.7 +/-    1.40      11.8 +/-    1.40  0.170 / 0.140
G15     126.3          50.3                8.5 +/-    0.69      10.7 +/-    0.69  0.040 / 0.040
G18     243.3          41.5                7.3 +/-    1.90      10.3 +/-    1.90  0.040 / 0.030
G20     19.7           71.7                6.6 +/-    0.30       6.9 +/-    0.30  0.100 / 0.170
G21     314.4          49.2                5.4 +/-    0.55       6.8 +/-    0.55  0.070 / 0.200
G25     200.7          12.9                7.7 +/-    3.27      20.2 +/-    3.27  0.040 / 0.070
G26     293.3          19.6                4.2 +/-    0.99       9.4 +/-    0.99  0.050 / 0.070
G29     149.9          70.8                7.0 +/-    0.76       7.4 +/-    0.76  0.060 / 0.050