PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-19:27:40
G02     25.7           61.4               13.5 +/-    0.94      15.1 +/-    0.94  0.030 / 0.040
G05     154.6          55.3               14.4 +/-    0.44      17.1 +/-    0.44  0.030 / 0.040
G06     51.5           19.6                9.1 +/-    0.85      20.2 +/-    0.85  0.040 / 0.060
G12     206.0          72.3               12.0 +/-    0.64      12.5 +/-    0.64  0.040 / 0.060
G19     97.3           11.0               10.9 +/-    1.53      29.9 +/-    1.53  0.060 / 0.130
G20     197.4          22.6               15.9 +/-    1.64      32.8 +/-    1.64  0.050 / 0.170
G25     299.4          54.3               11.8 +/-    1.23      14.2 +/-    1.23  0.030 / 0.050
G29     305.2          26.7               11.1 +/-    1.21      21.0 +/-    1.21  0.040 / 0.050