PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-01:58:00
G10     267.9          37.9               11.1 +/-    1.49      16.8 +/-    1.49  0.070 / 0.070
G13     41.9           18.8                8.2 +/-    1.05      18.5 +/-    1.05  0.070 / 0.070
G15     60.3           50.5               11.3 +/-    0.39      14.2 +/-    0.39  0.080 / 0.250
G16     279.4          11.1                9.1 +/-    2.19      24.8 +/-    2.19  0.080 / 0.210
G18     299.9          63.7                9.5 +/-    0.80      10.4 +/-    0.80  0.050 / 0.040
G20     56.0           32.5                9.1 +/-    0.65      15.1 +/-    0.65  0.040 / 0.050
G21     4.5            72.5               11.6 +/-    0.77      12.1 +/-    0.77  0.160 / 0.440
G24     120.6          14.5               11.5 +/-    1.44      29.1 +/-    1.44  0.130 / 0.520
G27     317.2          21.1                6.4 +/-    5.50      13.6 +/-    5.50  0.100 / 0.090
G29     167.6          28.3               11.9 +/-    0.60      21.7 +/-    0.60  0.050 / 0.110