PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-01:57:40
G02     60.5           31.6                9.2 +/-    0.99      15.6 +/-    0.99  0.070 / 0.140
G05     56.3           59.2               10.5 +/-    0.56      12.0 +/-    0.56  0.070 / 0.120
G12     184.2          31.4               13.5 +/-    1.67      22.9 +/-    1.67  0.030 / 0.040
G13     127.8          15.6               15.2 +/-    2.46      37.3 +/-    2.46  0.040 / 0.040
G15     163.6          12.6               15.6 +/-    2.38      41.0 +/-    2.38  0.150 / 0.340
G20     219.0          12.8               13.6 +/-    3.51      35.6 +/-    3.51  0.100 / 0.360
G21     271.6          17.3               13.9 +/-    3.61      32.7 +/-    3.61  0.060 / 0.110
G25     236.9          51.5               11.5 +/-    0.83      14.2 +/-    0.83  0.050 / 0.110
G29     328.1          54.4                9.4 +/-    0.69      11.3 +/-    0.69  0.100 / 0.290