PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-17:28:10
G01     126.6          12.1               15.6 +/-    2.67      41.6 +/-    2.67  0.030 / 0.040
G07     53.4           69.7               15.6 +/-    0.40      16.5 +/-    0.40  0.040 / 0.040
G08     51.2           41.1               13.8 +/-    0.82      19.7 +/-    0.82  0.050 / 0.050
G09     178.2          35.4               17.3 +/-    1.59      27.2 +/-    1.59  0.050 / 0.060
G11     118.7          35.5               16.3 +/-    0.79      25.7 +/-    0.79  0.070 / 0.090
G13     321.0          12.0                9.9 +/-   19.18      26.5 +/-   19.18  0.060 / 0.070
G17     201.0          12.9               14.6 +/-    6.08      38.1 +/-    6.08  0.070 / 0.120
G18     103.6          16.9               14.1 +/-    1.00      33.6 +/-    1.00  0.060 / 0.130
G28     277.6          53.4               16.7 +/-    1.06      20.3 +/-    1.06  0.030 / 0.050
G30     334.9          61.7               14.9 +/-    0.69      16.7 +/-    0.69  0.030 / 0.040