PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-18:13:10
G01     126.9          11.0                3.1 +/-   41.38       8.4 +/-   41.38  0.030 / 0.030
G07     66.7           66.1               13.1 +/-    0.61      14.2 +/-    0.61  0.030 / 0.040
G08     50.6           39.4               11.6 +/-    1.28      17.0 +/-    1.28  0.030 / 0.040
G09     179.0          38.0               13.9 +/-    0.71      21.0 +/-    0.71  0.030 / 0.040
G11     117.5          35.7               14.8 +/-    1.18      23.2 +/-    1.18  0.110 / 0.080
G13     320.9          12.0               -6.0 +/-   17.72     -16.2 +/-   17.72  0.090 / 0.090
G17     199.2          14.7               11.6 +/-    3.33      28.9 +/-    3.33  0.110 / 0.340
G18     102.0          16.3               13.8 +/-    2.59      33.1 +/-    2.59  0.100 / 0.260
G28     270.5          49.0               14.4 +/-    3.28      18.3 +/-    3.28  0.150 / 0.380
G30     334.5          61.6               11.7 +/-    1.05      13.1 +/-    1.05  0.260 / 0.460