PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-02:57:40
G10     294.2963       50.2430          8.0455 +/-  2.0433   10.1165 +/-  2.0433  0.080 / 0.080
G14     209.6572       12.2452          7.3228 +/- 19.5523   19.4423 +/- 19.5523  0.080 / 0.130
G15     46.8667        32.4999          3.9036 +/-  3.3060    6.4984 +/-  3.3060  0.080 / 0.110
G18     350.0171       66.4134        -11.8344 +/- 45.3419  -12.7901 +/- 45.3419  0.070 / 0.100
G20     70.9818        17.4932          5.7784 +/-  1.2369   13.5214 +/-  1.2369  0.100 / 0.070
G21     90.4599        75.1352          9.1051 +/-  3.3760    9.3869 +/-  3.3760  0.090 / 0.060
G24     100.5186       25.8789          8.0529 +/-  0.6777   15.4231 +/-  0.6777  0.120 / 0.490
G27     300.2615       34.5545          4.5519 +/- 11.3325    7.2840 +/- 11.3325  0.230 / 0.470
G32     210.3692       30.1939         13.5543 +/-  1.9591   23.6409 +/-  1.9591  0.070 / 0.090