PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-19:57:50
G01     67.5           32.2               11.1 +/-    2.05      18.6 +/-    2.05  0.040 / 0.040
G07     138.2          22.7               13.4 +/-    0.98      27.6 +/-    0.98  0.050 / 0.050
G11     51.2           28.5                9.1 +/-    2.15      16.5 +/-    2.15  0.100 / 0.120
G13     270.5          37.9               11.8 +/-    3.06      17.8 +/-    3.06  0.090 / 0.120
G15     299.7          16.0                9.2 +/-    1.64      22.4 +/-    1.64  0.030 / 0.030
G17     237.0          71.7               12.6 +/-    0.44      13.2 +/-    0.44  0.030 / 0.030
G18     45.6           15.7                8.0 +/-    1.13      19.6 +/-    1.13  0.090 / 0.120
G19     225.3          44.5               12.8 +/-    2.41      17.3 +/-    2.41  0.050 / 0.130
G28     14.8           60.3               10.7 +/-    1.42      12.1 +/-    1.42  0.120 / 0.370
G30     137.9          57.5               13.1 +/-    0.45      15.2 +/-    0.45  0.160 / 0.320