PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-16:58:00
G01     248.1          33.7               10.7 +/-    1.63      17.4 +/-    1.63  0.040 / 0.040
G03     314.9          50.4                9.2 +/-    1.17      11.5 +/-    1.17  0.040 / 0.040
G11     238.0          11.3               12.1 +/-    4.58      32.8 +/-    4.58  0.050 / 0.080
G14     61.9           40.6                8.3 +/-    1.10      11.9 +/-    1.10  0.060 / 0.080
G16     161.8          20.9               -0.5 +/-   19.22      -1.1 +/-   19.22  0.040 / 0.030
G22     298.2          70.6                9.1 +/-    0.43       9.6 +/-    0.43  0.040 / 0.030
G23     289.6          22.7                9.8 +/-    2.06      20.3 +/-    2.06  0.110 / 0.280
G26     132.5          40.6               11.6 +/-    0.93      16.7 +/-    0.93  0.110 / 0.250
G31     40.6           54.5                9.0 +/-    0.43      10.7 +/-    0.43  0.130 / 0.160
G32     80.2           20.3                9.6 +/-    1.37      21.0 +/-    1.37  0.080 / 0.140