PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-13:58:00
G03     225.7          68.6                9.0 +/-    0.79       9.6 +/-    0.79  0.120 / 0.240
G07     248.0          11.5                1.3 +/-   18.45       3.4 +/-   18.45  0.130 / 0.260
G09     302.1          16.1                6.1 +/-    3.01      14.8 +/-    3.01  0.040 / 0.040
G14     98.6           14.6                8.0 +/-    1.93      20.1 +/-    1.93  0.050 / 0.030
G16     135.6          56.5               10.9 +/-    0.86      12.8 +/-    0.86  0.040 / 0.040
G22     190.2          53.4               10.3 +/-    0.75      12.5 +/-    0.75  0.040 / 0.050
G23     318.3          48.2                8.0 +/-    0.96      10.3 +/-    0.96  0.170 / 0.340
G26     74.8           54.0                8.5 +/-    0.60      10.3 +/-    0.60  0.170 / 0.420
G31     51.5           21.1                8.0 +/-    3.20      17.1 +/-    3.20  0.130 / 0.340