PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-17:42:40
G01     240.7          29.1               10.3 +/-    1.26      18.4 +/-    1.26  0.030 / 0.040
G03     310.9          57.0                8.6 +/-    1.50      10.1 +/-    1.50  0.030 / 0.030
G14     69.6           36.1                6.5 +/-    0.80      10.1 +/-    0.80  0.080 / 0.130
G16     158.5          27.7               12.9 +/-    2.02      23.8 +/-    2.02  0.090 / 0.200
G22     277.7          75.2                9.8 +/-    0.83      10.1 +/-    0.83  0.050 / 0.130
G23     295.1          27.0                8.1 +/-    2.25      15.1 +/-    2.25  0.060 / 0.130
G26     124.4          46.1               11.3 +/-    1.40      15.1 +/-    1.40  0.080 / 0.170
G31     40.7           47.5                6.8 +/-    0.30       8.9 +/-    0.30  0.090 / 0.180
G32     86.2           16.0                8.4 +/-    1.21      20.4 +/-    1.21  0.030 / 0.040