PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-20:27:50
G03     192.1          28.0               13.5 +/-    3.09      24.7 +/-    3.09  0.090 / 0.370
G07     281.0          31.7               12.3 +/-    1.65      20.8 +/-    1.65  0.090 / 0.380
G08     150.0          19.3               16.1 +/-    1.85      36.0 +/-    1.85  0.050 / 0.060
G09     320.0          52.2               11.9 +/-    1.54      14.7 +/-    1.54  0.040 / 0.090
G16     47.0           48.3               10.7 +/-    1.01      13.7 +/-    1.01  0.060 / 0.130
G22     179.0          13.6               14.4 +/-    2.72      37.0 +/-    2.72  0.060 / 0.110
G23     57.5           82.6                9.9 +/-    0.67      10.0 +/-    0.67  0.070 / 0.130
G26     42.9           19.0                8.9 +/-    0.64      20.1 +/-    0.64  0.040 / 0.100
G27     109.1          29.2               13.3 +/-    0.84      23.8 +/-    0.84  0.110 / 0.150
G30     267.9          10.3              -11.8 +/-   31.73     -32.7 +/-   31.73  0.100 / 0.120