PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/10-18:27:50
G01     118.4          18.5               15.1 +/-    1.32      34.5 +/-    1.32  0.060 / 0.070
G07     81.8           66.5               13.6 +/-    0.53      14.7 +/-    0.53  0.040 / 0.080
G08     45.4           33.3               11.0 +/-    0.64      18.0 +/-    0.64  0.050 / 0.080
G09     177.1          25.4               15.5 +/-    1.91      30.0 +/-    1.91  0.050 / 0.110
G11     107.2          40.3               15.2 +/-    0.93      22.0 +/-    0.93  0.110 / 0.310
G13     317.4          19.9               12.4 +/-    4.02      27.4 +/-    4.02  0.120 / 0.250
G17     203.0          22.2               16.0 +/-    1.75      33.4 +/-    1.75  0.060 / 0.070
G18     93.9           21.2               13.5 +/-    0.63      28.8 +/-    0.63  0.050 / 0.060
G28     294.7          57.8               12.7 +/-    1.03      14.8 +/-    1.03  0.030 / 0.040
G30     350.8          70.1               13.6 +/-    1.37      14.4 +/-    1.37  0.020 / 0.040