PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-19:28:00
G03     197.6          41.9               15.1 +/-    0.88      21.3 +/-    0.88  0.120 / 0.130
G07     268.3          23.4               12.5 +/-    2.59      25.3 +/-    2.59  0.100 / 0.150
G09     316.1          38.9               11.2 +/-    1.19      16.6 +/-    1.19  0.080 / 0.170
G16     63.1           59.9               14.9 +/-    0.77      17.0 +/-    0.77  0.080 / 0.180
G22     182.8          26.4               14.3 +/-    2.63      27.0 +/-    2.63  0.030 / 0.040
G23     351.7          73.7               13.7 +/-    0.36      14.2 +/-    0.36  0.030 / 0.040
G26     45.3           31.1               10.5 +/-    0.60      17.9 +/-    0.60  0.030 / 0.030
G27     122.4          20.3               16.4 +/-    1.66      35.8 +/-    1.66  0.030 / 0.030