PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-18:43:10
G01     125.0          12.6               13.0 +/-    2.56      34.2 +/-    2.56  0.040 / 0.030
G07     72.4           65.4               10.8 +/-    0.64      11.8 +/-    0.64  0.040 / 0.030
G08     48.8           37.3               10.2 +/-    1.44      15.6 +/-    1.44  0.070 / 0.080
G09     178.6          35.4               11.0 +/-    1.42      17.3 +/-    1.42  0.070 / 0.110
G11     114.7          37.0               12.4 +/-    1.27      18.9 +/-    1.27  0.170 / 0.160
G13     320.3          13.9                9.3 +/-    1.55      23.7 +/-    1.55  0.100 / 0.090
G17     199.5          17.3               11.3 +/-    2.76      26.6 +/-    2.76  0.190 / 0.350
G18     99.6           17.5               10.8 +/-    1.61      25.3 +/-    1.61  0.110 / 0.350
G28     274.1          50.5               11.6 +/-    4.15      14.5 +/-    4.15  0.030 / 0.030
G30     337.3          63.5               10.0 +/-    0.62      11.0 +/-    0.62  0.030 / 0.050