PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/22-00:57:40
G10     265.3          37.2               12.1 +/-    1.39      18.4 +/-    1.39  0.170 / 0.220
G13     42.7           19.5                7.5 +/-    3.26      16.6 +/-    3.26  0.250 / 0.120
G15     63.0           52.1                8.6 +/-    0.80      10.6 +/-    0.80  0.050 / 0.040
G16     279.1          12.8                9.5 +/-    1.59      24.8 +/-    1.59  0.040 / 0.040
G20     276.0          44.6               15.1 +/-    0.91      20.4 +/-    0.91  0.210 / 0.330
G21     356.4          70.4                9.5 +/-    0.61      10.0 +/-    0.61  0.170 / 0.280
G24     120.5          13.4               12.1 +/-    2.19      31.4 +/-    2.19  0.160 / 0.380
G27     319.4          17.5                8.1 +/-   12.22      19.0 +/-   12.22  0.180 / 0.340
G29     168.2          33.9               10.6 +/-    1.86      17.2 +/-    1.86  0.150 / 0.340