PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/23-13:42:40
G10     248.5          25.6                5.3 +/-    1.04      10.3 +/-    1.04  0.040 / 0.040
G13     55.7           30.8                3.7 +/-    1.54       6.4 +/-    1.54  0.040 / 0.040
G15     93.2           58.3                4.0 +/-    0.69       4.6 +/-    0.69  0.100 / 0.100
G16     300.1          14.8                1.5 +/-    2.43       3.7 +/-    2.43  0.060 / 0.120
G20     266.7          49.3                5.3 +/-    3.87       6.8 +/-    3.87  0.100 / 0.170
G21     336.4          61.0                2.2 +/-    0.41       2.4 +/-    0.41  0.110 / 0.190
G26     273.5          16.1                4.1 +/-    2.00      10.0 +/-    2.00  0.090 / 0.340
G29     162.3          50.9                6.0 +/-    1.00       7.4 +/-    1.00  0.130 / 0.380