PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/03-21:43:00
G01     99.0           29.2               13.1 +/-    1.94      23.3 +/-    1.94  0.250 / 0.250
G07     117.2          52.6               12.5 +/-    0.94      15.3 +/-    0.94  0.170 / 0.250
G08     42.1           18.0                9.0 +/-    1.78      20.8 +/-    1.78  0.050 / 0.050
G11     81.0           43.1               12.0 +/-    1.01      16.6 +/-    1.01  0.050 / 0.060
G13     303.2          32.5               10.7 +/-    1.38      17.7 +/-    1.38  0.110 / 0.200
G17     210.6          41.8               15.9 +/-    1.21      22.4 +/-    1.21  0.090 / 0.200
G18     72.6           24.9               11.1 +/-    1.29      21.8 +/-    1.29  0.040 / 0.040
G19     211.6          19.5               16.1 +/-    2.25      35.9 +/-    2.25  0.030 / 0.040
G28     334.6          61.8               11.2 +/-    0.41      12.5 +/-    0.41  0.040 / 0.040
G30     77.9           78.1               12.9 +/-    0.74      13.2 +/-    0.74  0.030 / 0.040