PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/31-21:28:00
G01     81.5           32.8               10.4 +/-    0.86      17.2 +/-    0.86  0.050 / 0.070
G07     131.5          33.9               13.0 +/-    0.55      21.0 +/-    0.55  0.070 / 0.090
G11     59.8           35.8               11.5 +/-    0.77      18.1 +/-    0.77  0.040 / 0.040
G13     285.6          38.3               14.8 +/-    0.98      22.1 +/-    0.98  0.040 / 0.040
G15     309.7          13.1                8.6 +/-    3.07      22.3 +/-    3.07  0.110 / 0.110
G17     219.6          61.9               14.1 +/-    1.29      15.8 +/-    1.29  0.150 / 0.090
G18     54.6           20.5               10.4 +/-    2.73      22.6 +/-    2.73  0.070 / 0.110
G19     217.5          33.4               14.4 +/-    1.39      23.5 +/-    1.39  0.060 / 0.080
G28     353.9          61.6               11.2 +/-    0.67      12.6 +/-    0.67  0.040 / 0.030
G30     123.0          69.6               13.2 +/-    0.79      14.0 +/-    0.79  0.040 / 0.030