PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-05:12:50
G08     268.2540       19.2991          5.2852 +/-  2.0815   11.8303 +/-  2.0815  0.030 / 0.020
G10     54.0617        60.2497          1.0646 +/-  0.6476    1.2064 +/-  0.6476  0.030 / 0.010
G11     311.6111       17.7277          3.9565 +/-  2.3366    9.2049 +/-  2.3366  0.100 / 0.280
G14     263.4331       66.1012          3.5332 +/-  0.9978    3.8266 +/-  0.9978  0.100 / 0.270
G18     87.7743        39.9062          2.5701 +/-  1.6428    3.7438 +/-  1.6428  0.020 / 0.010
G21     153.7590       18.2533          4.8803 +/-  4.1003   11.2083 +/-  4.1003  0.020 / 0.010
G24     41.4721        13.4388          2.2452 +/-  3.5277    5.7975 +/-  3.5277  0.070 / 0.050
G27     232.5044       17.3061          6.0024 +/-  2.3253   14.1105 +/-  2.3253  0.080 / 0.050
G31     178.5949       27.7239          5.9641 +/-  1.5479   10.9639 +/-  1.5479  0.150 / 0.080
G32     325.8464       75.1755          0.3567 +/-  0.6516    0.3677 +/-  0.6516  0.120 / 0.240