PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/29-12:57:50
G10     268.8          38.8                4.2 +/-    1.61       6.2 +/-    1.61  0.170 / 0.210
G13     41.4           17.7                3.9 +/-    1.98       9.0 +/-    1.98  0.180 / 0.180
G15     56.2           45.8                4.2 +/-    1.07       5.6 +/-    1.07  0.120 / 0.230
G16     279.5          11.0                5.1 +/-    2.54      13.8 +/-    2.54  0.160 / 0.220
G20     53.3           37.8                3.5 +/-    1.06       5.2 +/-    1.06  0.130 / 0.220
G21     18.5           73.9                4.9 +/-    0.74       5.1 +/-    0.74  0.150 / 0.260
G24     119.6          15.1                5.1 +/-    1.47      12.6 +/-    1.47  0.040 / 0.040
G27     317.2          21.3                4.7 +/-    2.54      10.1 +/-    2.54  0.030 / 0.040
G29     167.2          27.1                4.8 +/-    1.81       8.9 +/-    1.81  0.050 / 0.060
G32     204.7          11.1              -11.3 +/-   23.92     -30.7 +/-   23.92  0.050 / 0.070