PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-20:43:00
G01     78.1           33.3               14.7 +/-    1.37      24.1 +/-    1.37  0.040 / 0.040
G07     133.6          37.0               17.1 +/-    0.62      26.1 +/-    0.62  0.030 / 0.040
G11     59.5           35.7               14.0 +/-    0.64      22.0 +/-    0.64  0.110 / 0.190
G13     282.6          37.6               13.4 +/-    1.20      20.2 +/-    1.20  0.100 / 0.230
G15     307.8          13.8               10.2 +/-    2.49      26.0 +/-    2.49  0.050 / 0.050
G17     224.2          59.0               18.0 +/-    2.14      20.7 +/-    2.14  0.060 / 0.050
G18     54.5           21.2               12.5 +/-    4.19      26.8 +/-    4.19  0.200 / 0.170
G19     220.1          35.4               20.9 +/-    2.65      32.9 +/-    2.65  0.300 / 0.330
G28     9.3            60.4               14.3 +/-    1.64      16.2 +/-    1.64  0.040 / 0.060
G30     128.0          66.0               16.9 +/-    0.43      18.3 +/-    0.43  0.050 / 0.060