PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-04:12:30
G08     298.4263       22.8195          5.4655 +/-  0.9035   11.2364 +/-  0.9035  0.030 / 0.040
G10     350.4541       62.2043          2.8876 +/-  0.5467    3.2192 +/-  0.5467  0.030 / 0.040
G14     224.8126       42.2072          6.3191 +/-  1.2914    8.8747 +/-  1.2914  0.040 / 0.080
G18     51.6794        56.0656          4.0848 +/-  0.7076    4.8141 +/-  0.7076  0.040 / 0.070
G21     142.1377       47.2757          6.2539 +/-  0.8231    8.1670 +/-  0.8231  0.060 / 0.110
G24     63.9737        28.9593          3.8815 +/-  0.4690    6.9480 +/-  0.4690  0.060 / 0.090
G27     260.0289       34.5152          5.3628 +/-  1.2699    8.5880 +/-  1.2699  0.040 / 0.040
G32     234.8945       61.4742          6.3739 +/-  0.4530    7.1483 +/-  0.4530  0.030 / 0.030