PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/20-21:43:00
G01     97.9           29.2               11.2 +/-    1.21      19.9 +/-    1.21  0.040 / 0.040
G07     119.7          46.4               11.4 +/-    1.58      15.0 +/-    1.58  0.040 / 0.050
G08     41.6           11.9                7.8 +/-    2.28      20.8 +/-    2.28  0.110 / 0.190
G11     75.4           41.7               10.3 +/-    1.39      14.6 +/-    1.39  0.110 / 0.140
G13     301.8          34.0                8.8 +/-    1.59      14.2 +/-    1.59  0.080 / 0.110
G17     208.7          48.0               13.1 +/-    1.15      16.9 +/-    1.15  0.070 / 0.110
G18     68.2           23.6                8.7 +/-    1.48      17.6 +/-    1.48  0.060 / 0.050
G19     211.2          20.4               14.1 +/-    1.59      30.7 +/-    1.59  0.040 / 0.050
G28     326.5          61.1                8.9 +/-    0.72      10.1 +/-    0.72  0.030 / 0.030
G30     73.8           79.3               10.1 +/-    0.72      10.2 +/-    0.72  0.030 / 0.030