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                9.2 +/-    2.24      13.9 +/-    2.24  0.240 / 0.370
G13     41.9           18.8                8.0 +/-    2.29      18.1 +/-    2.29  0.170 / 0.240
G15     60.3           50.5               11.0 +/-    0.76      13.8 +/-    0.76  0.160 / 0.220
G16     279.4          11.1                8.5 +/-    3.10      23.0 +/-    3.10  0.170 / 0.250
G18     299.9          63.7               10.6 +/-    0.86      11.6 +/-    0.86  0.070 / 0.060
G20     56.0           32.5                8.1 +/-    1.13      13.4 +/-    1.13  0.070 / 0.060
G21     4.5            72.5               10.5 +/-    0.64      10.9 +/-    0.64  0.040 / 0.030
G24     120.6          14.5               10.2 +/-    2.18      25.7 +/-    2.18  0.040 / 0.040
G27     317.2          21.1               10.0 +/-    2.08      21.4 +/-    2.08  0.160 / 0.230
G29     167.6          28.3               12.7 +/-    1.57      23.1 +/-    1.57  0.190 / 0.180