PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/23-03:28:00
G01     128.7          10.4               -5.3 +/-   33.87     -14.7 +/-   33.87  0.110 / 0.100
G07     46.9           69.5                3.8 +/-    0.54       4.0 +/-    0.54  0.090 / 0.050
G08     52.3           41.3                2.3 +/-    0.95       3.3 +/-    0.95  0.050 / 0.050
G09     178.9          39.0                6.8 +/-    0.96      10.1 +/-    0.96  0.050 / 0.050
G11     121.4          33.3                5.5 +/-    0.76       9.0 +/-    0.76  0.110 / 0.420
G17     199.6          13.5                2.9 +/-    2.29       7.4 +/-    2.29  0.210 / 0.280
G23     160.8          10.1                4.7 +/-    5.14      13.1 +/-    5.14  0.340 / 0.420
G28     273.9          52.3                3.7 +/-    2.86       4.6 +/-    2.86  0.170 / 0.340
G30     333.4          60.3                2.2 +/-    0.48       2.5 +/-    0.48  0.070 / 0.060