PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-17:13:00
G01     43.6593        19.2878         11.7383 +/-  3.4430   26.2820 +/-  3.4430  0.140 / 0.200
G06     175.5466       34.7397         13.4481 +/-  0.9232   21.4457 +/-  0.9232  0.110 / 0.160
G13     243.5540       25.0818         13.1926 +/-  3.5533   25.7291 +/-  3.5533  0.170 / 0.400
G15     279.0259       13.4616         12.9004 +/-  0.9366   33.2937 +/-  0.9366  0.190 / 0.200
G17     359.0446       72.4953         12.8022 +/-  0.3332   13.3566 +/-  0.3332  0.080 / 0.260
G19     268.8043       68.5970         11.6577 +/-  0.5629   12.4247 +/-  0.5629  0.080 / 0.270
G24     318.4489       13.9686         12.0721 +/-  4.7374   30.7828 +/-  4.7374  0.200 / 0.320
G28     65.6177        48.9681         13.3193 +/-  1.0806   17.0152 +/-  1.0806  0.130 / 0.160
G30     153.5545       34.5651         13.7683 +/-  1.0887   22.0282 +/-  1.0887  0.060 / 0.080