PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-11:12:40
G03     198.1944       34.5115          4.5149 +/-  0.9716    7.2307 +/-  0.9716  0.020 / 0.030
G07     280.3514       33.3396          3.3403 +/-  1.2232    5.4703 +/-  1.2232  0.020 / 0.030
G08     147.5956       18.8442          3.8109 +/-  2.2354    8.6260 +/-  2.2354  0.060 / 0.130
G09     320.6619       52.3853          4.0490 +/-  1.4475    4.9642 +/-  1.4475  0.120 / 0.170
G16     49.0380        51.3398          3.8570 +/-  0.6401    4.7864 +/-  0.6401  0.040 / 0.060
G22     179.7069       16.5733          2.1394 +/-  1.8904    5.1208 +/-  1.8904  0.040 / 0.060
G23     14.1709        80.8632          3.1471 +/-  0.6445    3.1833 +/-  0.6445  0.050 / 0.050
G26     43.1486        23.1875          2.5189 +/-  1.0845    5.1337 +/-  1.0845  0.060 / 0.070
G27     111.5153       27.5274          5.9585 +/-  0.7032   11.0008 +/-  0.7032  0.040 / 0.100