PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/09-19:43:00
G01     84.3           32.9               14.4 +/-    1.28      23.9 +/-    1.28  0.180 / 0.330
G07     129.8          41.6               15.9 +/-    0.81      22.5 +/-    0.81  0.230 / 0.250
G11     64.2           38.3               13.1 +/-    1.22      19.6 +/-    1.22  0.110 / 0.100
G13     288.9          37.1               16.4 +/-    1.87      25.1 +/-    1.87  0.110 / 0.100
G15     312.0          11.9               11.6 +/-    1.85      30.9 +/-    1.85  0.030 / 0.060
G17     219.1          54.8               17.5 +/-    1.06      20.9 +/-    1.06  0.040 / 0.060
G18     59.2           22.9               11.8 +/-    0.95      24.2 +/-    0.95  0.070 / 0.160
G19     217.2          30.4               18.3 +/-    1.78      31.8 +/-    1.78  0.080 / 0.170
G28     359.5          61.2               13.9 +/-    0.94      15.7 +/-    0.94  0.040 / 0.050
G30     118.9          71.0               16.6 +/-    1.01      17.4 +/-    1.01  0.040 / 0.050