PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-23:43:00
G01     123.0          15.0               11.9 +/-    3.12      29.5 +/-    3.12  0.100 / 0.070
G07     67.2           68.5               10.2 +/-    0.36      10.9 +/-    0.36  0.110 / 0.060
G08     48.2           37.6                8.8 +/-    1.06      13.4 +/-    1.06  0.050 / 0.040
G09     178.4          31.7               11.6 +/-    1.05      19.7 +/-    1.05  0.040 / 0.050
G11     116.1          37.5               12.2 +/-    0.66      18.5 +/-    0.66  0.170 / 0.360
G13     319.9          15.0                6.7 +/-    1.68      16.6 +/-    1.68  0.150 / 0.270
G17     201.3          18.5               12.0 +/-    1.99      27.4 +/-    1.99  0.130 / 0.230
G28     285.6          55.8                9.6 +/-    2.87      11.3 +/-    2.87  0.160 / 0.210
G30     348.1          67.8                8.9 +/-    1.09       9.5 +/-    1.09  0.160 / 0.320