PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-15:43:10
G01     84.4700        32.5050         14.1949 +/-  0.5765   23.6281 +/-  0.5765  0.070 / 0.120
G07     129.5087       37.8001         14.1677 +/-  0.4055   21.3831 +/-  0.4055  0.050 / 0.130
G11     61.9961        34.8341         11.4486 +/-  0.5542   18.2250 +/-  0.5542  0.040 / 0.040
G13     291.3150       36.0519         12.8199 +/-  1.0928   19.9568 +/-  1.0928  0.030 / 0.050
G17     218.0647       60.6880         15.5211 +/-  0.3276   17.5222 +/-  0.3276  0.060 / 0.120
G19     216.6656       33.1137         14.5172 +/-  1.3113   23.8787 +/-  1.3113  0.060 / 0.120
G28     357.7976       61.1686         13.3513 +/-  0.5079   15.0115 +/-  0.5079  0.040 / 0.080
G30     111.9417       75.0640         14.7593 +/-  0.8324   15.2205 +/-  0.8324  0.030 / 0.080