PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-20:43:00
G01     96.2           30.2               15.7 +/-    0.76      27.3 +/-    0.76  0.070 / 0.140
G07     120.2          50.5               15.3 +/-    0.69      19.2 +/-    0.69  0.070 / 0.140
G08     42.1           15.2               10.2 +/-    1.41      25.4 +/-    1.41  0.160 / 0.230
G11     77.0           42.4               14.4 +/-    1.10      20.2 +/-    1.10  0.090 / 0.250
G13     300.6          33.8               10.8 +/-    1.90      17.5 +/-    1.90  0.030 / 0.040
G17     212.1          43.3               16.4 +/-    0.75      22.7 +/-    0.75  0.030 / 0.030
G18     69.8           24.8               12.4 +/-    1.23      24.4 +/-    1.23  0.070 / 0.100
G19     212.6          21.5               16.7 +/-    1.80      35.5 +/-    1.80  0.060 / 0.100
G28     339.6          61.9               13.3 +/-    0.48      14.9 +/-    0.48  0.040 / 0.050
G30     87.8           77.5               14.6 +/-    0.53      14.9 +/-    0.53  0.040 / 0.050