PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-01:28:10
G10     250.3029       25.4922         13.7555 +/-  2.5512   26.5769 +/-  2.5512  0.090 / 0.160
G13     54.7250        31.3386         10.0877 +/-  0.9224   17.1868 +/-  0.9224  0.090 / 0.130
G15     92.3829        58.8246         11.8015 +/-  0.3993   13.5443 +/-  0.3993  0.040 / 0.060
G16     297.1945       14.7560          8.8209 +/-  3.5578   22.0708 +/-  3.5578  0.020 / 0.060
G18     267.1495       54.3285         13.2752 +/-  1.7258   15.9303 +/-  1.7258  0.160 / 0.350
G20     43.5942        47.2751          8.6278 +/-  0.8719   11.2672 +/-  0.8719  0.130 / 0.420
G21     332.4990       59.8797         10.6976 +/-  1.1955   12.1617 +/-  1.1955  0.040 / 0.040
G26     269.4243       15.6423         11.7315 +/-  1.6778   28.7277 +/-  1.6778  0.050 / 0.060
G29     164.3070       48.4565         12.3942 +/-  0.6721   15.9373 +/-  0.6721  0.050 / 0.070