PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/07-18:27:50
G10     264.2          35.8               18.6 +/-    1.06      29.1 +/-    1.06  0.100 / 0.120
G13     43.8           21.5               13.4 +/-    0.71      28.5 +/-    0.71  0.090 / 0.140
G15     61.3           49.7               18.2 +/-    0.37      23.0 +/-    0.37  0.040 / 0.050
G16     287.5          11.5               15.5 +/-    2.04      41.9 +/-    2.04  0.040 / 0.050
G18     297.6          64.3               17.4 +/-    0.72      19.1 +/-    0.72  0.050 / 0.070
G20     52.1           37.9               15.5 +/-    0.41      23.3 +/-    0.41  0.040 / 0.100
G21     7.2            71.9               18.4 +/-    0.79      19.2 +/-    0.79  0.110 / 0.380
G24     123.6          12.4               16.1 +/-   32.09      42.7 +/-   32.09  0.100 / 0.370
G27     319.0          18.2               12.4 +/-    1.03      28.6 +/-    1.03  0.080 / 0.260
G29     165.0          28.0               23.1 +/-    2.14      42.2 +/-    2.14  0.080 / 0.260