PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/31-20:43:00
G01     128.8          10.3               -1.1 +/-   43.71      -2.9 +/-   43.71  0.040 / 0.070
G07     44.2           69.8               12.8 +/-    0.51      13.5 +/-    0.51  0.130 / 0.230
G08     55.1           45.3               11.3 +/-    0.48      15.1 +/-    0.48  0.240 / 0.310
G09     179.2          39.3               15.0 +/-    1.42      22.1 +/-    1.42  0.350 / 0.380
G11     123.3          33.4               14.7 +/-    1.84      24.1 +/-    1.84  0.150 / 0.250
G18     106.5          15.4               13.3 +/-    1.62      32.8 +/-    1.62  0.240 / 0.430
G28     273.5          52.1               13.5 +/-    2.45      16.6 +/-    2.45  0.030 / 0.030
G30     333.9          60.7               11.3 +/-    0.52      12.7 +/-    0.52  0.080 / 0.070