PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/02-18:43:00
G01     99.7           28.4               12.1 +/-    1.95      22.0 +/-    1.95  0.040 / 0.080
G08     41.6           14.5                7.8 +/-    2.47      19.6 +/-    2.47  0.040 / 0.080
G11     78.2           42.4               11.7 +/-    0.45      16.4 +/-    0.45  0.060 / 0.060
G13     303.4          33.2               11.2 +/-    3.15      18.4 +/-    3.15  0.060 / 0.050
G17     208.0          44.7               13.3 +/-    0.78      17.9 +/-    0.78  0.090 / 0.200
G18     71.1           24.1               10.9 +/-    0.85      21.7 +/-    0.85  0.090 / 0.160
G19     210.4          19.3               11.8 +/-    2.76      26.5 +/-    2.76  0.110 / 0.360
G28     321.3          60.6               10.7 +/-    0.84      12.1 +/-    0.84  0.130 / 0.320
G30     70.9           78.9               10.3 +/-    0.51      10.4 +/-    0.51  0.030 / 0.070