PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-11:12:40
G10     267.6          38.1                4.1 +/-    1.64       6.2 +/-    1.64  0.130 / 0.230
G13     41.9           18.5                3.2 +/-    2.51       7.4 +/-    2.51  0.330 / 0.310
G15     57.4           46.8                3.9 +/-    0.73       5.1 +/-    0.73  0.290 / 0.500
G16     279.7          11.5                4.4 +/-    2.42      12.0 +/-    2.42  0.320 / 0.400
G20     51.6           39.9                3.5 +/-    1.41       5.1 +/-    1.41  0.040 / 0.030
G21     10.9           73.1                6.2 +/-    0.66       6.5 +/-    0.66  0.030 / 0.030
G24     120.4          14.4                5.6 +/-    1.89      14.1 +/-    1.89  0.050 / 0.080
G27     317.9          20.2                2.8 +/-    1.80       6.1 +/-    1.80  0.060 / 0.100
G29     167.5          29.1                6.1 +/-    1.04      10.8 +/-    1.04  0.180 / 0.260
G32     204.4          10.4              -15.9 +/-   11.80     -44.1 +/-   11.80  0.160 / 0.210