PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-18:43:10
G02     210.0          45.4               12.3 +/-    1.01      16.5 +/-    1.01  0.050 / 0.080
G06     102.6          79.3               10.7 +/-    0.38      10.9 +/-    0.38  0.040 / 0.070
G12     315.5          28.6                9.5 +/-    1.73      17.1 +/-    1.73  0.060 / 0.070
G17     51.1           36.6                9.3 +/-    1.25      14.3 +/-    1.25  0.050 / 0.060
G19     30.1           54.3               10.6 +/-    1.57      12.7 +/-    1.57  0.060 / 0.110
G24     281.8          41.8               16.1 +/-    1.72      22.7 +/-    1.72  0.090 / 0.110
G28     115.7          20.8                9.3 +/-    1.46      20.1 +/-    1.46  0.050 / 0.060