PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-10:28:00
G10     245.7          21.9                5.0 +/-    2.19      10.5 +/-    2.19  0.030 / 0.050
G13     60.2           33.6                3.1 +/-    0.54       5.1 +/-    0.54  0.040 / 0.050
G15     96.1           57.0                4.8 +/-    0.49       5.6 +/-    0.49  0.090 / 0.410
G16     302.9          14.7                1.8 +/-    2.80       4.4 +/-    2.80  0.110 / 0.390
G20     32.4           59.5                3.7 +/-    0.67       4.2 +/-    0.67  0.060 / 0.100
G21     329.1          57.6                2.2 +/-    0.74       2.5 +/-    0.74  0.060 / 0.110
G26     273.7          17.7                4.7 +/-    1.65      10.9 +/-    1.65  0.090 / 0.190
G29     162.1          55.3                5.4 +/-    1.01       6.5 +/-    1.01  0.100 / 0.210