PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-18:43:00
G01     99.0           29.2               15.7 +/-    1.45      28.0 +/-    1.45  0.120 / 0.390
G07     117.3          52.6               15.2 +/-    0.39      18.6 +/-    0.39  0.230 / 0.300
G08     41.9           15.9               10.7 +/-    3.11      26.0 +/-    3.11  0.030 / 0.040
G11     79.4           42.6               14.2 +/-    0.95      19.8 +/-    0.95  0.030 / 0.040
G13     302.9          32.8               13.8 +/-    0.91      22.8 +/-    0.91  0.030 / 0.030
G17     210.3          42.6               17.5 +/-    0.79      24.4 +/-    0.79  0.030 / 0.030
G18     72.3           24.9               14.3 +/-    1.09      28.1 +/-    1.09  0.100 / 0.140
G19     211.7          18.7               16.9 +/-    1.85      38.5 +/-    1.85  0.080 / 0.140
G28     334.1          61.8               13.3 +/-    0.40      14.8 +/-    0.40  0.060 / 0.040
G30     71.1           79.2               14.8 +/-    0.60      15.0 +/-    0.60  0.050 / 0.050