PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-14:27:30
G08     271.7          18.4                6.5 +/-    1.12      14.8 +/-    1.12  0.100 / 0.170
G10     57.5           59.4                3.7 +/-    0.84       4.2 +/-    0.84  0.290 / 0.130
G11     314.4          13.8                3.4 +/-    2.28       8.8 +/-    2.28  0.030 / 0.040
G14     261.5          63.6                5.5 +/-    0.75       6.0 +/-    0.75  0.040 / 0.040
G21     153.7          15.0                6.2 +/-    2.15      15.5 +/-    2.15  0.230 / 0.340
G24     40.6           11.8                4.2 +/-    2.84      11.2 +/-    2.84  0.210 / 0.360
G27     232.2          16.7                5.8 +/-    2.40      13.8 +/-    2.40  0.080 / 0.080
G31     178.1          29.3                5.0 +/-    1.36       8.8 +/-    1.36  0.070 / 0.110
G32     336.0          74.7                4.0 +/-    0.46       4.1 +/-    0.46  0.160 / 0.170