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          4.9423 +/-  0.7348    8.8951 +/-  0.7348  0.040 / 0.010
G10     97.6358        46.0102          3.8921 +/-  0.7747    5.1708 +/-  0.7747  0.030 / 0.020
G11     286.9640       29.4413          4.3765 +/-  0.9808    7.7545 +/-  0.9808  0.070 / 0.160
G14     344.6077       69.3681          3.9061 +/-  0.8838    4.1441 +/-  0.8838  0.090 / 0.190
G18     111.7555       21.4098          3.5933 +/-  1.0747    7.6406 +/-  1.0747  0.100 / 0.050
G22     307.0298       21.6575          3.7034 +/-  3.2575    7.8279 +/-  3.2575  0.110 / 0.040
G25     84.6826        13.8887          4.4291 +/-  0.9772   11.3154 +/-  0.9772  0.100 / 0.200
G31     171.1249       57.4466          7.4472 +/-  1.4159    8.6581 +/-  1.4159  0.070 / 0.170
G32     27.1979        57.9755          1.6584 +/-  0.5794    1.9184 +/-  0.5794  0.030 / 0.020