PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/23-17:42:50
G02     200.2          18.0               11.4 +/-    1.91      26.4 +/-    1.91  0.050 / 0.070
G06     171.5          51.1               12.4 +/-    0.55      15.4 +/-    0.55  0.050 / 0.080
G13     227.6          14.7               13.3 +/-    3.21      33.4 +/-    3.21  0.210 / 0.380
G17     16.6           62.8                8.9 +/-    0.72       9.9 +/-    0.72  0.130 / 0.310
G19     318.8          71.8                9.2 +/-    0.41       9.7 +/-    0.41  0.070 / 0.150
G24     311.1          28.0                7.4 +/-    1.95      13.5 +/-    1.95  0.080 / 0.120
G28     81.1           45.3               10.2 +/-    1.49      13.6 +/-    1.49  0.030 / 0.030
G30     156.1          14.3               11.3 +/-    2.28      28.6 +/-    2.28  0.040 / 0.030