PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/28-17:43:00
G01     319.1          18.3               10.5 +/-    0.75      24.2 +/-    0.75  0.120 / 0.170
G08     255.2          13.1               12.8 +/-    2.20      33.3 +/-    2.20  0.100 / 0.200
G10     80.5           52.4               12.2 +/-    1.04      15.0 +/-    1.04  0.110 / 0.230
G11     301.7          24.0               11.7 +/-    1.66      23.4 +/-    1.66  0.100 / 0.230
G14     299.5          71.3               12.8 +/-    0.64      13.4 +/-    0.64  0.040 / 0.040
G18     301.9          43.7               13.4 +/-    1.40      18.4 +/-    1.40  0.060 / 0.050
G20     105.7          28.8               13.9 +/-    0.85      25.1 +/-    0.85  0.040 / 0.040
G22     301.0          10.5                1.4 +/-   12.87       3.8 +/-   12.87  0.030 / 0.040
G31     179.7          38.3               15.1 +/-    1.54      22.6 +/-    1.54  0.110 / 0.300
G32     4.7            68.2               13.4 +/-    0.67      14.3 +/-    0.67  0.130 / 0.370