PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/16-21:42:50
G01     105.9          25.7               14.3 +/-    1.52      27.5 +/-    1.52  0.030 / 0.050
G07     110.9          52.7               14.1 +/-    1.03      17.2 +/-    1.03  0.030 / 0.040
G08     41.5           18.1                9.8 +/-    2.20      22.7 +/-    2.20  0.050 / 0.050
G09     175.1          13.7               16.7 +/-    1.16      42.7 +/-    1.16  0.040 / 0.040
G11     85.6           42.8               14.5 +/-    1.12      20.2 +/-    1.12  0.110 / 0.150
G13     308.6          29.8               11.4 +/-    0.82      20.0 +/-    0.82  0.090 / 0.120
G17     205.0          40.2               17.2 +/-    0.91      24.9 +/-    0.91  0.150 / 0.150
G18     76.2           23.5               11.9 +/-    1.50      24.0 +/-    1.50  0.190 / 0.210
G28     311.9          59.7               11.3 +/-    0.64      12.9 +/-    0.64  0.030 / 0.020
G30     29.6           78.7               13.2 +/-    1.03      13.5 +/-    1.03  0.030 / 0.020