PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-06:12:40
G01     312.0974       28.7042          2.3375 +/-  1.2831    4.2070 +/-  1.2831  0.040 / 0.020
G10     97.6358        46.0102          3.2732 +/-  0.5790    4.3485 +/-  0.5790  0.030 / 0.010
G11     286.9640       29.4413          4.3669 +/-  1.3994    7.7373 +/-  1.3994  0.090 / 0.040
G14     344.6077       69.3681          2.1730 +/-  0.5258    2.3054 +/-  0.5258  0.130 / 0.050
G18     111.7555       21.4098          3.1735 +/-  1.7285    6.7479 +/-  1.7285  0.050 / 0.020
G22     307.0298       21.6575          4.7917 +/-  1.8723   10.1283 +/-  1.8723  0.040 / 0.010
G25     84.6826        13.8887          3.8675 +/-  3.4772    9.8807 +/-  3.4772  0.030 / 0.040
G31     171.1249       57.4466          5.0042 +/-  0.5493    5.8179 +/-  0.5493  0.030 / 0.040
G32     27.1979        57.9755          0.4452 +/-  0.8574    0.5150 +/-  0.8574  0.200 / 0.180