PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-10:42:30
G10     263.1          35.4                5.6 +/-    1.11       8.8 +/-    1.11  0.170 / 0.210
G13     44.1           21.7                2.7 +/-    2.25       5.7 +/-    2.25  0.200 / 0.190
G15     62.1           50.0                4.4 +/-    0.70       5.5 +/-    0.70  0.090 / 0.260
G16     283.5          12.8                4.8 +/-    1.80      12.6 +/-    1.80  0.170 / 0.290
G20     48.2           43.4                3.9 +/-    0.90       5.3 +/-    0.90  0.050 / 0.060
G21     359.4          70.5                3.8 +/-    0.47       4.0 +/-    0.47  0.070 / 0.050
G24     123.9          11.9                5.7 +/-    2.17      15.2 +/-    2.17  0.040 / 0.030
G27     319.7          16.8                4.2 +/-    2.23      10.1 +/-    2.23  0.040 / 0.030
G29     167.0          33.8                5.0 +/-    0.78       8.1 +/-    0.78  0.100 / 0.090