PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/18-19:57:50
G01     243.2          33.6               14.5 +/-    2.04      23.6 +/-    2.04  0.040 / 0.030
G03     315.7          46.1               10.3 +/-    0.72      13.7 +/-    0.72  0.030 / 0.040
G14     60.5           41.9               10.6 +/-    0.76      15.0 +/-    0.76  0.050 / 0.070
G16     159.4          22.2               12.4 +/-    2.18      25.9 +/-    2.18  0.040 / 0.080
G22     299.1          68.4               11.3 +/-    0.85      12.0 +/-    0.85  0.120 / 0.360
G23     289.2          21.3               11.9 +/-    3.57      25.3 +/-    3.57  0.170 / 0.360
G26     133.4          41.0               14.6 +/-    0.82      21.0 +/-    0.82  0.040 / 0.060
G31     41.1           55.4               10.2 +/-    0.88      12.1 +/-    0.88  0.060 / 0.060
G32     80.8           19.0               11.0 +/-    1.15      24.8 +/-    1.15  0.130 / 0.230