PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/21-22:42:50
G01     62.8           31.2                9.6 +/-    1.10      16.4 +/-    1.10  0.130 / 0.170
G07     140.4          20.1               10.7 +/-    1.90      23.5 +/-    1.90  0.090 / 0.210
G11     48.7           24.9                8.6 +/-    2.17      16.9 +/-    2.17  0.070 / 0.110
G13     265.2          36.8               11.1 +/-    1.58      17.1 +/-    1.58  0.120 / 0.120
G15     295.9          16.4                9.4 +/-    1.47      22.6 +/-    1.47  0.040 / 0.040
G17     251.0          76.3               10.6 +/-    0.26      10.8 +/-    0.26  0.040 / 0.040
G18     42.2           12.5                7.6 +/-    2.11      19.9 +/-    2.11  0.130 / 0.090
G19     229.1          47.9               10.2 +/-    2.09      13.2 +/-    2.09  0.080 / 0.060
G28     24.2           59.2                9.1 +/-    0.66      10.4 +/-    0.66  0.040 / 0.040
G30     141.6          54.6               11.1 +/-    0.69      13.3 +/-    0.69  0.040 / 0.040