PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-21:12:30
G03     186.3          12.9               14.7 +/-    1.67      38.4 +/-    1.67  0.060 / 0.080
G07     297.4          41.2               11.5 +/-    2.44      16.4 +/-    2.44  0.060 / 0.100
G08     138.4          33.3               14.8 +/-    1.36      24.2 +/-    1.36  0.080 / 0.130
G09     317.3          69.1               11.9 +/-    0.74      12.6 +/-    0.74  0.050 / 0.130
G16     41.7           32.7                9.5 +/-    0.99      15.8 +/-    0.99  0.090 / 0.080
G23     133.7          70.9               12.0 +/-    0.57      12.7 +/-    0.57  0.060 / 0.060
G27     89.3           36.0               12.3 +/-    1.04      19.1 +/-    1.04  0.030 / 0.040
G30     280.9          20.4               10.7 +/-    1.57      23.3 +/-    1.57  0.030 / 0.030