PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-22:57:20
G02     205.0          41.7               14.4 +/-    1.02      20.4 +/-    1.02  0.050 / 0.070
G06     156.9          73.4               12.6 +/-    0.56      13.0 +/-    0.56  0.070 / 0.080
G12     309.6          17.6               10.4 +/-    2.50      24.3 +/-    2.50  0.290 / 0.170
G17     42.0           44.0                9.1 +/-    1.69      12.5 +/-    1.69  0.100 / 0.170
G19     13.3           61.4                9.6 +/-    0.57      10.8 +/-    0.57  0.060 / 0.040
G24     289.2          41.2                8.9 +/-    8.46      12.7 +/-    8.46  0.050 / 0.040
G28     106.1          30.9               12.5 +/-    1.48      21.5 +/-    1.48  0.040 / 0.020