PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-23:58:10
G07     322.6          53.7                8.3 +/-    1.44      10.1 +/-    1.44  0.090 / 0.330
G08     112.7          49.1               10.3 +/-    0.75      13.1 +/-    0.75  0.110 / 0.340
G09     219.7          81.0                9.9 +/-    1.06      10.0 +/-    1.06  0.020 / 0.060
G16     44.4           14.8                4.3 +/-    2.44      10.9 +/-    2.44  0.030 / 0.050
G23     152.4          49.2               10.2 +/-    0.52      13.0 +/-    0.52  0.040 / 0.050
G27     61.8           34.3                6.9 +/-    0.85      11.2 +/-    0.85  0.040 / 0.050
G28     232.1          24.3               12.6 +/-    2.67      25.1 +/-    2.67  0.110 / 0.470
G30     297.9          33.1                6.6 +/-    1.10      10.8 +/-    1.10  0.100 / 0.390