PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/16-13:12:40
G08     313.7          16.1                3.9 +/-    2.88       9.3 +/-    2.88  0.070 / 0.080
G10     326.0          58.9                5.3 +/-    1.23       6.1 +/-    1.23  0.090 / 0.060
G14     217.0          26.8                5.1 +/-    0.92       9.7 +/-    0.92  0.150 / 0.650
G15     46.4           11.5                3.0 +/-    1.50       8.2 +/-    1.50  0.140 / 0.650
G20     82.4           11.7                5.2 +/-    3.28      13.9 +/-    3.28  0.030 / 0.050
G21     131.5          57.3                3.6 +/-    0.43       4.2 +/-    0.43  0.040 / 0.050
G24     77.9           30.4                5.1 +/-    0.61       8.9 +/-    0.61  0.080 / 0.180
G27     277.2          37.9                8.0 +/-    1.72      12.1 +/-    1.72  0.080 / 0.190
G32     221.1          50.3                5.9 +/-    1.67       7.4 +/-    1.67  0.030 / 0.040