PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-01:58:00
G10     260.4008       33.1495          9.0199 +/-  0.8474   14.8261 +/-  0.8474  0.070 / 0.100
G13     45.9121        24.2293          8.4013 +/-  1.3519   16.7101 +/-  1.3519  0.080 / 0.120
G15     70.6956        55.4146          9.5133 +/-  0.7730   11.2864 +/-  0.7730  0.040 / 0.050
G16     286.2171       13.2589          6.9082 +/-  1.0922   17.9144 +/-  1.0922  0.040 / 0.040
G18     285.1968       60.5668          9.7988 +/-  0.7755   11.0736 +/-  0.7755  0.170 / 0.290
G20     51.0805        38.0700          8.3815 +/-  0.9290   12.5913 +/-  0.9290  0.170 / 0.340
G21     348.6541       67.6806          9.1950 +/-  0.5168    9.8558 +/-  0.5168  0.150 / 0.300
G26     259.2198       10.8176          9.0952 +/-  1.0890   24.9308 +/-  1.0890  0.120 / 0.280
G27     320.2654       15.3496          7.6082 +/-  1.6336   18.7642 +/-  1.6336  0.140 / 0.360
G29     166.7095       36.1801         10.6824 +/-  1.1744   16.5908 +/-  1.1744  0.120 / 0.370