PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/19-16:13:00
G02     203.0          28.3               14.2 +/-    1.90      25.7 +/-    1.90  0.100 / 0.280
G06     164.3          65.2               13.3 +/-    1.12      14.5 +/-    1.12  0.110 / 0.250
G12     306.0          13.0                7.1 +/-    1.76      18.5 +/-    1.76  0.070 / 0.120
G17     35.5           49.7               10.1 +/-    0.60      12.8 +/-    0.60  0.050 / 0.110
G19     359.0          66.4               11.2 +/-    0.44      12.2 +/-    0.44  0.030 / 0.060
G24     303.4          35.0                8.2 +/-    1.13      13.0 +/-    1.13  0.030 / 0.050
G28     99.4           33.2               10.0 +/-    1.00      16.5 +/-    1.00  0.090 / 0.140