PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/07-20:12:50
G01     105.8          25.7               13.2 +/-    1.43      25.3 +/-    1.43  0.030 / 0.040
G07     111.4          51.9               13.4 +/-    0.52      16.5 +/-    0.52  0.030 / 0.050
G08     41.6           18.6                8.8 +/-    2.04      20.0 +/-    2.04  0.080 / 0.160
G09     175.3          14.0               14.1 +/-    1.82      36.0 +/-    1.82  0.090 / 0.140
G11     85.7           42.9               13.0 +/-    0.53      18.0 +/-    0.53  0.070 / 0.060
G13     308.6          29.9               11.2 +/-    1.11      19.6 +/-    1.11  0.050 / 0.050
G17     205.2          39.7               13.5 +/-    0.76      19.7 +/-    0.76  0.180 / 0.210
G18     76.7           23.7               11.2 +/-    1.84      22.5 +/-    1.84  0.200 / 0.270
G28     311.2          59.5               10.3 +/-    0.79      11.8 +/-    0.79  0.030 / 0.020
G30     33.7           78.8               11.7 +/-    0.80      11.9 +/-    0.80  0.030 / 0.020