PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-05:27:40
G10     267.2          38.1                6.1 +/-    1.38       9.2 +/-    1.38  0.260 / 0.460
G13     41.9           18.4                5.4 +/-    2.90      12.3 +/-    2.90  0.310 / 0.460
G15     59.0           48.7                7.7 +/-    0.50       9.9 +/-    0.50  0.040 / 0.030
G16     278.1          12.0                6.6 +/-    1.80      17.6 +/-    1.80  0.040 / 0.040
G20     346.6          68.3                5.3 +/-    0.45       5.7 +/-    0.45  0.120 / 0.140
G21     2.0            71.8                6.3 +/-    0.66       6.5 +/-    0.66  0.120 / 0.200
G24     120.0          14.3                7.1 +/-    2.11      18.0 +/-    2.11  0.230 / 0.300
G27     318.4          19.3                4.4 +/-    0.96       9.9 +/-    0.96  0.150 / 0.270
G29     168.3          31.5                8.7 +/-    1.52      14.7 +/-    1.52  0.120 / 0.220
G32     204.0          10.8              -14.1 +/-   20.19     -38.6 +/-   20.19  0.120 / 0.170