PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/17-21:12:30
G07     9.3            67.3               12.8 +/-    1.01      13.7 +/-    1.01  0.310 / 0.160
G08     70.2           51.9               11.7 +/-    0.52      14.4 +/-    0.52  0.270 / 0.380
G09     181.4          52.9               16.6 +/-    0.69      20.3 +/-    0.69  0.040 / 0.050
G11     134.5          25.2               16.9 +/-    2.52      32.8 +/-    2.52  0.040 / 0.040
G23     158.9          19.1               15.2 +/-    1.04      34.2 +/-    1.04  0.150 / 0.080
G27     41.1           18.1               10.1 +/-    2.12      23.2 +/-    2.12  0.160 / 0.110
G28     256.9          44.6               12.9 +/-    3.75      17.5 +/-    3.75  0.030 / 0.030
G30     321.3          51.6               11.8 +/-    0.84      14.6 +/-    0.84  0.030 / 0.040