PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-16:42:30
G01     315.8          24.1                6.9 +/-    1.89      13.9 +/-    1.89  0.250 / 0.380
G10     90.8           49.1                7.0 +/-    1.08       8.9 +/-    1.08  0.210 / 0.190
G11     297.6          24.9                6.2 +/-    1.47      12.2 +/-    1.47  0.040 / 0.040
G14     319.0          70.7                6.6 +/-    0.43       6.9 +/-    0.43  0.040 / 0.040
G22     304.6          16.8                6.5 +/-    2.97      15.4 +/-    2.97  0.160 / 0.230
G25     94.8           12.0                9.2 +/-    1.22      24.7 +/-    1.22  0.140 / 0.210
G31     173.8          50.9                9.2 +/-    0.93      11.4 +/-    0.93  0.040 / 0.050
G32     21.0           61.5                6.9 +/-    0.54       7.7 +/-    0.54  0.030 / 0.050