PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-21:13:10
G01     37.8           10.7               12.3 +/-    2.52      33.9 +/-    2.52  0.090 / 0.200
G02     199.4          14.7               17.7 +/-    2.06      44.4 +/-    2.06  0.080 / 0.180
G06     175.0          44.4               13.7 +/-    0.87      18.7 +/-    0.87  0.040 / 0.060
G13     231.2          17.8               16.6 +/-    3.45      38.5 +/-    3.45  0.050 / 0.090
G17     14.2           64.8               11.9 +/-    0.62      13.0 +/-    0.62  0.130 / 0.310
G19     300.1          71.5               12.3 +/-    0.47      12.9 +/-    0.47  0.150 / 0.290
G24     313.2          25.4               12.9 +/-    1.33      25.0 +/-    1.33  0.190 / 0.350
G28     76.2           46.9               12.0 +/-    0.60      15.7 +/-    0.60  0.240 / 0.370
G30     155.5          19.1               16.2 +/-    1.19      36.5 +/-    1.19  0.150 / 0.480