PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-18:58:10
G08     277.9          21.4               11.0 +/-    1.82      23.3 +/-    1.82  0.150 / 0.120
G10     38.9           62.1               10.2 +/-    0.98      11.4 +/-    0.98  0.070 / 0.080
G14     247.7          59.2               11.4 +/-    0.98      13.1 +/-    0.98  0.200 / 0.250
G18     82.3           41.4               10.0 +/-    0.68      14.3 +/-    0.68  0.140 / 0.180
G21     150.7          20.3               11.6 +/-    1.57      25.2 +/-    1.57  0.180 / 0.230
G24     45.5           18.4                9.6 +/-    2.93      22.1 +/-    2.93  0.150 / 0.300
G27     238.9          22.5               11.7 +/-    1.90      24.2 +/-    1.90  0.050 / 0.060
G31     181.7          18.4               12.4 +/-    1.57      28.4 +/-    1.57  0.040 / 0.050
G32     290.9          75.3               11.4 +/-    0.60      11.7 +/-    0.60  0.150 / 0.270