PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/22-17:12:50
G01     252.9          36.0               11.3 +/-    2.36      17.7 +/-    2.36  0.040 / 0.040
G03     316.1          45.9               10.2 +/-    0.64      13.5 +/-    0.64  0.030 / 0.030
G11     241.2          13.5                9.0 +/-    1.54      23.2 +/-    1.54  0.050 / 0.080
G14     57.5           43.0                8.4 +/-    1.55      11.7 +/-    1.55  0.040 / 0.080
G22     305.4          66.7                9.8 +/-    0.48      10.6 +/-    0.48  0.030 / 0.030
G23     286.3          19.8                9.8 +/-    1.55      21.7 +/-    1.55  0.030 / 0.030
G25     41.3           11.4                9.2 +/-    2.64      25.0 +/-    2.64  0.230 / 0.290
G26     136.8          37.1               11.6 +/-    1.06      17.7 +/-    1.06  0.190 / 0.190
G31     41.3           59.1                9.8 +/-    0.42      11.2 +/-    0.42  0.090 / 0.160
G32     76.6           23.1                8.7 +/-    0.93      17.8 +/-    0.93  0.090 / 0.230