PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-17:57:50
G01     234.7          24.6               11.3 +/-    1.27      22.3 +/-    1.27  0.030 / 0.040
G03     303.6          63.1                9.1 +/-    0.62      10.1 +/-    0.62  0.030 / 0.030
G14     76.1           32.0                8.2 +/-    0.63      13.8 +/-    0.63  0.080 / 0.130
G16     154.9          34.3               12.9 +/-    0.64      20.8 +/-    0.64  0.070 / 0.120
G22     247.9          76.2               10.2 +/-    0.90      10.5 +/-    0.90  0.090 / 0.300
G23     300.2          31.3                8.9 +/-    0.92      15.2 +/-    0.92  0.100 / 0.200
G26     115.0          50.3               10.4 +/-    1.10      13.1 +/-    1.10  0.080 / 0.170
G31     42.0           41.1                7.3 +/-    0.78      10.4 +/-    0.78  0.080 / 0.150
G32     91.5           11.9                9.9 +/-    1.41      26.5 +/-    1.41  0.030 / 0.040