PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/16-19:42:40
G01     126.9          11.8               16.8 +/-    2.67      45.1 +/-    2.67  0.040 / 0.020
G07     51.8           69.7               12.3 +/-    0.28      13.0 +/-    0.28  0.050 / 0.020
G08     52.6           43.1               10.8 +/-    0.93      15.0 +/-    0.93  0.270 / 0.180
G09     178.7          36.5               12.7 +/-    0.65      19.5 +/-    0.65  0.290 / 0.240
G11     120.2          35.0               13.9 +/-    0.54      22.1 +/-    0.54  0.160 / 0.250
G13     321.2          11.4                1.4 +/-   23.10       3.7 +/-   23.10  0.170 / 0.230
G17     201.5          11.0               -1.6 +/-   30.09      -4.4 +/-   30.09  0.030 / 0.020
G18     104.2          16.7               13.3 +/-    2.38      31.9 +/-    2.38  0.030 / 0.010
G28     277.1          53.3               13.0 +/-    3.08      15.8 +/-    3.08  0.040 / 0.010
G30     336.1          62.2               11.3 +/-    0.64      12.5 +/-    0.64  0.040 / 0.010