PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-20:42:50
G01     78.1           33.3               15.2 +/-    0.95      25.0 +/-    0.95  0.090 / 0.250
G07     133.6          37.0               17.2 +/-    1.37      26.3 +/-    1.37  0.070 / 0.180
G11     59.5           35.7               13.1 +/-    0.89      20.6 +/-    0.89  0.070 / 0.120
G13     282.6          37.6               15.1 +/-    1.05      22.8 +/-    1.05  0.070 / 0.130
G15     307.8          13.8               10.6 +/-    1.64      27.2 +/-    1.64  0.030 / 0.040
G17     224.2          59.0               20.1 +/-    0.68      23.0 +/-    0.68  0.030 / 0.040
G18     54.5           21.2               10.5 +/-    1.71      22.4 +/-    1.71  0.060 / 0.130
G19     220.1          35.4               19.9 +/-    0.81      31.4 +/-    0.81  0.070 / 0.130
G28     9.3            60.4               12.4 +/-    0.56      14.0 +/-    0.56  0.040 / 0.100
G30     128.0          66.0               17.1 +/-    0.39      18.5 +/-    0.39  0.040 / 0.100